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Legend - object IDs

Data compiled at 2022 UTC on 28 Dec. 2020 for 70 known objects during a period of seven days from 25 to 31 Dec. 2020. White type highlights objects with just announced discovery, and orange is for objects with a new JPL orbit solution (usually from new observation).

Chart
ID

Full ID
Period
Closest
Passage
Uncertainty

Status
AF22016 AF27.3 LD+/- 1.405 daysoutbound
CL502011 CL505.63 LDpassing
FK2013 FK43.5 LD  distant
OK52020 OK515.05 LD  departed
RM451999 RM45325.25 LDapproaching
SD224501647 2014 SD2247.86 LDoutbound
TB122020 TB1259.77 LD+/- 3 minutesapproaching
UK1712012 UK17115.5 LD  distant
VV2020 VV66.42 LD  departed
WG52020 WG542.16 LD  departed intruder
WW52020 WW57.40 LDoutbound
WZ42020 WZ499.23 LD  departed
WZ52020 WZ523.65 LD  departed
XB2020 XB65.89 LD  departed
XB12020 XB130.40 LD  departed
XB32020 XB322.54 LD  departed
XB72020 XB740.5 LD+/- 6.0167 hoursapproaching
XC42020 XC413.19 LD  departed
XE42018 XE45.6 LD  distant
XF2020 XF16.15 LD  departed intruder
XF42020 XF412.89 LD  departed intruder
XF52020 XF542.48 LD  departed
XG52020 XG525.78 LD+/- 5 minutes  departed
XH2020 XH41.65 LD  departed
XH12020 XH160.87 LD  departed
XH62020 XH68.71 LD  departed
XJ32020 XJ35.71 LDoutbound
XJ62020 XJ634.29 LD+/- 2 minutes  departed
XN2020 XN36.85 LD  departed
XO2020 XO39.06 LD  departed
XS52020 XS526.91 LD  departed
XU42020 XU433.33 LD+/- 2 minutes  departed
XV42020 XV446.22 LD  departed
XX32020 XX37.12 LD  departed intruder
XY42020 XY49.01 LD  departed
XZ42020 XZ45.39 LDinbound
YA12020 YA14.52 LD+/- one minuteinbound
YA22020 YA210.7 LD+/- 10 minutes  departed
YA32020 YA319.48 LD+/- one minute  departed
YA42020 YA47.56 LD  departed
YB2020 YB4.46 LDoutbound
YB12020 YB19.20 LD  departed
YB22020 YB235.9 LD+/- 4.3833 hours  departed
YE42020 YE413.4 LD+/- 14 minutes  departed
YF2020 YF4.66 LDoutbound
YG2020 YG9.26 LD  departed
YG32020 YG31.95 LDoutbound
YG42020 YG42.77 LDpassing
YJ12020 YJ138.50 LD  departed
YJ22020 YJ212.20 LD  departed intruder
YK32020 YK310.31 LD+/- 7 minutes  departed
YL22020 YL219.49 LD  departed
YM12020 YM11.65 LD+/- 2 minutesoutbound
YM32020 YM37.75 LDpassing
YM42020 YM45.03 LDoutbound
YN2020 YN35.26 LD  departed
YN12020 YN17.63 LD+/- 2 minutes  departed
YN22020 YN26.50 LD  departed Moon buzzer
YN42020 YN45.6 LD> +/- 10 dayspassing
YO2020 YO19.48 LD+/- 5 minutes  departed
YO32020 YO38.64 LD  departed
YP42020 YP46.9 LD+/- 42 minutesapproaching
YR22020 YR28.26 LD  departed intruder
YS12020 YS131.17 LD+/- 2 minutes  departed
YS22020 YS23.11 LDoutbound intruder
YS42020 YS40.25 LDpassing intruder
YU2020 YU19.18 LD  departed
YW32020 YW331.7 LD+/- 29 minutes  departed
YY32020 YY320.1 LD+/- 10 minutes  departed
YZ32020 YZ31.61 LD+/- 2 minutesoutbound
DateTfc.Time
25 Dec. '20Rept. Line
26 Dec. '20Rept. Line
27 Dec. '20Rept. Line
28 Dec. '20Rept. Line
29 Dec. '20Rept. Line
30 Dec. '20 Line
31 Dec. '20 Line

Object Details - Skychart objects presented in reverse designation order, newest first
  ("designation assigned to" indicates unofficial discovery credit)

2020 YS4   -   passing intruder
Approximate diameter10 meters (H=27.689)
Closest Earth approach0.25 LD at 2226 UTC on 28 Dec. 2020
Inside Earth-Moon system0728 on 28 Dec. until 1324 UTC on 29 Dec. 2020
Inside Earth SOI27 to 30 Dec. 2020
Inside ten LD of Earth22 Dec. until 4 Jan. 2021
Closest Moon approach0.78 LD at 1643 UTC on 28 Dec. 2020
Inside one LD of Moon0601 on 28 Dec. until 0232 UTC on 29 Dec. 2020
Data based onJPL SSD orbit solution #1 downloaded from JPL on 28 Dec. 2020 UTC
based on 36 observations spanning one day
Optical observation  
  • reported from 7 observing codes during 22.025 hours: 595, G96, I52, J95, L01, Z80, Z99
  • designation assigned to Mt. Lemmon Survey observation at 0329 UTC 27 Dec. 2020
  • last observed at 0130 UTC on 28 Dec. 2020 by Steward Obs. Mt. Lemmon Station
Links  
2020 YP4   -   approaching
Approximate diameter21 meters (H=26.024)
Closest Earth approach5.70 LD at 1159 UTC on 3 Jan. 2021 - Note: JPL reports an approach uncertainty of +/- 42 minutes
Inside ten LD of Earth29 Dec. until 8 Jan. 2021
Data based onJPL SSD orbit solution #2 downloaded from JPL on 27 Dec. 2020 UTC
based on 23 observations spanning one day
Optical observation  
  • reported from 6 observing codes during 24.926 hours: 204, G96, H21, H36, I52, L01
  • designation assigned to Mt. Lemmon Survey observation at 0718 UTC 26 Dec. 2020
  • last observed at 0813 UTC on 27 Dec. 2020 by Steward Obs. Mt. Lemmon Station
NotesNHATS target
Links  
2020 YN4   -   passing
Approximate diameter14 meters (H=26.99)
Closest Earth approach5.63 LD at 0952 UTC on 28 Dec. 2020 - Note: JPL indicates an approach uncertainty greater than +/- 10 days
Inside ten LD of Earth16 Dec. until 8 Jan. 2021
Data based onJPL SSD orbit solution #1 downloaded from JPL on 27 Dec. 2020 UTC
based on 25 observations spanning 3 days
Optical observation  
  • reported from 6 observing codes during 2.6354 days: 203, 595, G96, H21, I52, L01
  • first observed at 1026 UTC on 24 Dec. 2020 by the Mt. Lemmon Survey
  • designation assigned to Mt. Lemmon Survey observation at 0814 UTC 26 Dec. 2020
  • last observed at 0141 UTC on 27 Dec. 2020 by Farra d'Isonzo Obs.
Notesrisk
Links  
2020 YM4   -   outbound
Approximate diameter23 meters (H=25.825)
Closest Earth approach3.94 LD at 0223 UTC on 23 Dec. 2020
Inside ten LD of Earth17 to 28 Dec. 2020
Data based onJPL SSD orbit solution #2 downloaded from JPL on 27 Dec. 2020 UTC
based on 30 observations spanning 4 days
Optical observation  
  • reported from 8 observing codes during 3.9000 days: 203, 595, 703, G96, H21, H36, I52, L01
  • first observed at 1244 UTC on 23 Dec. 2020 by the Catalina Sky Survey
  • designation assigned to Mt. Lemmon Survey observation at 0916 UTC 26 Dec. 2020
  • last observed at 1020 UTC on 27 Dec. 2020 by Steward Obs. Mt. Lemmon Station
Links  
2020 YG4   -   passing
Approximate diameter26 meters (H=25.603)
Closest Earth approach2.77 LD at 0703 UTC on 28 Dec. 2020
Inside ten LD of Earth25 to 31 Dec. 2020
Data based onJPL SSD orbit solution #2 downloaded from JPL on 27 Dec. 2020 UTC
based on 49 observations spanning 2 days
Optical observation  
  • reported from 12 observing codes during 2.4846 days: 204, 595, 703, 858, F51, F52, H21, H36, J95, K74, L01, T05
  • first observed at 1001 UTC on 24 Dec. 2020 by Pan-STARRS 1
  • designation assigned to ATLAS Haleakala observation at 1151 UTC 25 Dec. 2020
  • last observed at 2139 UTC on 26 Dec. 2020 by Farra d'Isonzo Obs.
Links  
2020 YE4   -     departed
Approximate diameter20 meters (H=26.167)
Closest Earth approach2.63 LD at 1613 UTC on 19 Dec. 2020 - Note: JPL reports an approach uncertainty of +/- 14 minutes
Inside ten LD of Earth15 to 23 Dec. 2020
Data based onJPL SSD orbit solution #1 downloaded from JPL on 26 Dec. 2020 UTC
based on 21 observations spanning 2 days
Optical observation  
  • reported from 6 observing codes during 1.6943 days: 204, F51, H21, H36, J95, L01
  • designation assigned to Pan-STARRS 1 observation at 1253 UTC 24 Dec. 2020
  • last observed at 0533 UTC on 26 Dec. 2020 by ARO Westfield
Links  
2020 YA4   -     departed
Approximate diameter17 meters (H=26.505)
Closest Earth approach2.82 LD at 0323 UTC on 19 Dec. 2020
Inside ten LD of Earth11 to 27 Dec. 2020
Data based onJPL SSD orbit solution #3 downloaded from JPL on 28 Dec. 2020 UTC
based on 34 observations spanning 4 days
Optical observation  
  • reported from 5 observing codes during 3.9493 days: G96, H36, I52, J95, V06
  • designation assigned to Mt. Lemmon Survey observation at 1207 UTC 23 Dec. 2020
  • last observed at 1054 UTC on 27 Dec. 2020 by the Mt. Lemmon Survey
NotesNHATS target
Links  
2020 YZ3   -   outbound
Approximate diameter10 meters (H=27.732)
Closest Earth approach1.61 LD at 2145 UTC on 25 Dec. 2020 - Note: JPL reports an approach uncertainty of +/- 2 minutes
Inside Earth SOI25 to 26 Dec. 2020
Inside ten LD of Earth21 to 30 Dec. 2020
Closest Moon approach1.82 LD at 1017 UTC on 25 Dec. 2020
Data based onJPL SSD orbit solution #2 downloaded from JPL on 27 Dec. 2020 UTC
based on 16 observations spanning 2 days
Optical observation  
  • reported from 4 observing codes during 2.0391 days: 807, F51, G96, I52
  • designation assigned to Mt. Lemmon Survey observation at 0405 UTC 22 Dec. 2020
  • last observed at 0502 UTC on 24 Dec. 2020 by the Mt. Lemmon Survey
Links  
2020 YY3   -     departed
Approximate diameter18 meters (H=26.419)
Closest Earth approach5.22 LD at 1908 UTC on 14 Dec. 2020 - Note: JPL reports an approach uncertainty of +/- 10 minutes
Inside ten LD of Earth10 to 19 Dec. 2020
Data based onJPL SSD orbit solution #2 downloaded from JPL on 26 Dec. 2020 UTC
based on 19 observations spanning 4 days
Optical observation  
  • reported from 3 observing codes during 4.0533 days: 807, G96, I52
  • designation assigned to Mt. Lemmon Survey observation at 0724 UTC 22 Dec. 2020
  • last observed at 0841 UTC on 26 Dec. 2020 by Steward Obs. Mt. Lemmon Station
NotesNHATS target
Links  
2020 YW3   -     departed
Approximate diameter25 meters (H=25.675)
Closest Earth approach7.52 LD at 1109 UTC on 14 Dec. 2020 - Note: JPL reports an approach uncertainty of +/- 29 minutes
Inside ten LD of Earth12 to 16 Dec. 2020
Data based onJPL SSD orbit solution #1 downloaded from JPL on 25 Dec. 2020 UTC
based on 19 observations spanning 2 days
Optical observation  
  • reported from 4 observing codes during 2.0740 days: 807, F51, G96, I52
  • designation assigned to Mt. Lemmon Survey observation at 0518 UTC 22 Dec. 2020
  • last observed at 0704 UTC on 24 Dec. 2020 by Steward Obs. Mt. Lemmon Station
Links  
2020 YO3   -     departed
Approximate diameter40 meters (H=24.621)
Closest Earth approach3.25 LD at 2024 UTC on 22 Dec. 2020
Inside ten LD of Earth20 to 25 Dec. 2020
Data based onJPL SSD orbit solution #4 downloaded from JPL on 27 Dec. 2020 UTC
based on 97 observations spanning 4 days
Optical observation  
  • reported from 13 observing codes during 3.6273 days: 204, 381, 658, 718, H06, I52, J95, K62, T05, T08, U55, X31, Z80
  • first observed at 1235 UTC on 23 Dec. 2020 by Kiso Obs.
  • designation assigned to Kiso Obs. observation at 1349 UTC 23 Dec. 2020
  • last observed at 0338 UTC on 27 Dec. 2020 by Steward Obs. Mt. Lemmon Station
Links  
2020 YM3   -   passing
Approximate diameter21 meters (H=26.08)
Closest Earth approach7.75 LD at 1939 UTC on 28 Dec. 2020
Inside ten LD of Earth22 Dec. until 3 Jan. 2021
Data based onJPL SSD orbit solution #1 downloaded from JPL on 24 Dec. 2020 UTC
based on 23 observations spanning 13 days
Optical observation  
  • reported from 6 observing codes during 12.8750 days: 291, 807, F51, F52, G96, I52
  • first observed at 1336 UTC on 11 Dec. 2020 by Pan-STARRS 1
  • designation assigned to Mt. Lemmon Survey observation at 1039 UTC 22 Dec. 2020
  • last observed at 1036 UTC on 24 Dec. 2020 by Steward Obs. Mt. Lemmon Station
Notesrisk, NHATS target
Links  
2020 YK3   -     departed
Approximate diameter13 meters (H=27.109)
Closest Earth approach7.93 LD at 0330 UTC on 18 Dec. 2020 - Note: JPL reports an approach uncertainty of +/- 7 minutes
Inside ten LD of Earth11 to 24 Dec. 2020
Data based onJPL SSD orbit solution #1 downloaded from JPL on 24 Dec. 2020 UTC
based on 19 observations spanning 2 days
Optical observation  
  • reported from 5 observing codes during 1.9843 days: 807, 858, G96, H21, I52
  • designation assigned to Mt. Lemmon Survey observation at 0444 UTC 22 Dec. 2020
  • last observed at 0421 UTC on 24 Dec. 2020 by Steward Obs. Mt. Lemmon Station
Notesrisk, NHATS target
Links  
2020 YG3   -   outbound
Approximate diameter13 meters (H=27.037)
Closest Earth approach1.95 LD at 0201 UTC on 26 Dec. 2020
Inside Earth SOI25 to 26 Dec. 2020
Inside ten LD of Earth20 to 31 Dec. 2020
Closest Moon approach1.99 LD at 1700 UTC on 25 Dec. 2020
Data based onJPL SSD orbit solution #2 downloaded from JPL on 25 Dec. 2020 UTC
based on 23 observations spanning one day
Optical observation  
  • reported from 7 observing codes during 1.6503 days: 807, 858, F51, G96, H21, I52, K91
  • designation assigned to Mt. Lemmon Survey observation at 0439 UTC 22 Dec. 2020
  • last observed at 2015 UTC on 23 Dec. 2020 by LCO Sutherland A
Links  
2020 YA3   -     departed
Approximate diameter22 meters (H=25.972)
Closest Earth approach3.38 LD at 1622 UTC on 17 Dec. 2020
Inside ten LD of Earth14 to 21 Dec. 2020
Data based onJPL SSD orbit solution #4 downloaded from JPL on 27 Dec. 2020 UTC
based on 34 observations spanning 6 days
Optical observation  
  • reported from 5 observing codes during 5.9821 days: 291, 703, H21, I52, V06
  • designation assigned to Catalina Sky Survey observation at 0832 UTC 21 Dec. 2020
  • last observed at 0806 UTC on 27 Dec. 2020 by Steward Obs. Mt. Lemmon Station
Notesrisk
Links  
2020 YS2   -   outbound intruder
Approximate diameter2 meters (H=31.003)
Closest Earth approach0.23 LD at 0602 UTC on 20 Dec. 2020
Inside Earth-Moon system2047 on 18 Dec. until 1517 UTC on 21 Dec. 2020
Inside Earth SOI16 to 23 Dec. 2020
Inside ten LD of Earth4 Dec. until 5 Jan. 2021
Closest Moon approach0.75 LD at 2026 UTC on 19 Dec. 2020
Inside one LD of Moon1530 on 18 Dec. until 1335 UTC on 20 Dec. 2020
Data based onJPL SSD orbit solution #3 downloaded from JPL on 24 Dec. 2020 UTC
based on 21 observations spanning 3 days
Optical observation  
  • reported from 4 observing codes during 2.9133 days: 291, H21, I52, T08
  • designation assigned to ATLAS Mauna Loa observation at 1101 UTC 21 Dec. 2020
  • last observed at 0856 UTC on 24 Dec. 2020 by Steward Obs. Mt. Lemmon Station
Notesrisk, NHATS target
Links  
2020 YR2   -     departed intruder
Approximate diameter8 meters (H=28.237)
Closest Earth approach0.45 LD at 1934 UTC on 19 Dec. 2020
Inside Earth-Moon system0613 on 19 Dec. until 0854 UTC on 20 Dec. 2020
Inside Earth SOI18 to 21 Dec. 2020
Inside ten LD of Earth13 to 26 Dec. 2020
Closest Moon approach1.09 LD at 0626 UTC on 19 Dec. 2020
Data based onJPL SSD orbit solution #4 downloaded from JPL on 24 Dec. 2020 UTC
based on 30 observations spanning 3 days
Optical observation  
  • reported from 7 observing codes during 3.0640 days: 291, 695, 807, G96, H21, I52, Q64
  • designation assigned to Mt. Lemmon Survey observation at 0810 UTC 21 Dec. 2020
  • last observed at 0943 UTC on 24 Dec. 2020 by Spacewatch via Kitt Peak Natl. Obs.
NotesNHATS target
Links  
2020 YN2   -     departed Moon buzzer
Approximate diameter7 meters (H=28.41)
Closest Earth approach1.02 LD at 1942 UTC on 22 Dec. 2020
Inside Earth SOI22 to 23 Dec. 2020
Inside ten LD of Earth19 to 26 Dec. 2020
Closest Moon approach0.69 LD at 1538 UTC on 22 Dec. 2020
Inside one LD of Moon1008-2108 UTC on 22 Dec. 2020
Data based onJPL SSD orbit solution #1 downloaded from JPL on 22 Dec. 2020 UTC
based on 23 observations spanning 2 days
Optical observation  
  • reported from 4 observing codes during 1.9072 days: 858, G96, H21, I52
  • first observed at 0544 UTC on 20 Dec. 2020 by the Mt. Lemmon Survey
  • designation assigned to Mt. Lemmon Survey observation at 0453 UTC 21 Dec. 2020
  • last observed at 0330 UTC on 22 Dec. 2020 by Tebbutt Obs.
Links  
2020 YL2   -     departed
Approximate diameter34 meters (H=24.997)
Closest Earth approach1.97 LD at 2245 UTC on 18 Dec. 2020
Inside Earth SOI18 to 19 Dec. 2020
Inside ten LD of Earth15 to 22 Dec. 2020
Closest Moon approach2.35 LD at 1556 UTC on 18 Dec. 2020
Data based onJPL SSD orbit solution #4 downloaded from JPL on 27 Dec. 2020 UTC
based on 54 observations spanning 7 days
Optical observation  
  • reported from 13 observing codes during 6.8892 days: 204, 703, 807, G96, H21, I52, J95, L01, T05, T08, V39, W33, Z84
  • first observed at 0917 UTC on 19 Dec. 2020 by the Catalina Sky Survey
  • designation assigned to ATLAS Mauna Loa observation at 1213 UTC 21 Dec. 2020
  • last observed at 0637 UTC on 26 Dec. 2020 by Steward Obs. Mt. Lemmon Station
Links  
2020 YJ2   -     departed intruder
Approximate diameter12 meters (H=27.311)
Closest Earth approach0.89 LD at 0456 UTC on 21 Dec. 2020
Inside Earth-Moon system0133-0819 UTC on 21 Dec. 2020
Inside Earth SOI20 to 21 Dec. 2020
Inside ten LD of Earth18 to 24 Dec. 2020
Closest Moon approach0.93 LD at 0218 UTC on 21 Dec. 2020
Inside one LD of Moon2324 on 20 Dec. until 0513 UTC on 21 Dec. 2020
Data based onJPL SSD orbit solution #3 downloaded from JPL on 23 Dec. 2020 UTC
based on 51 observations spanning one day
Optical observation  
  • reported from 7 observing codes during 1.4297 days: 381, 958, H21, I52, W34, Z84, Z99
  • designation assigned to Kiso Obs. observation at 1029 UTC 21 Dec. 2020
  • last observed at 2047 UTC on 22 Dec. 2020 by Clixby Obs.
Links  
2020 YB2   -     departed
Approximate diameter17 meters (H=26.534)
Closest Earth approach8.54 LD at 1228 UTC on 13 Dec. 2020 - Note: JPL reports an approach uncertainty of +/- 4.3833 hours
Inside ten LD of Earth11 to 15 Dec. 2020
Data based onJPL SSD orbit solution #1 downloaded from JPL on 21 Dec. 2020 UTC
based on 10 observations spanning one day
Optical observation  
  • reported from 3 observing codes during 22.277 hours: G96, I52, V06
  • designation assigned to Mt. Lemmon Survey observation at 0620 UTC 20 Dec. 2020
  • last observed at 0437 UTC on 21 Dec. 2020 by the Catalina Sky Survey Kuiper Telescope
Links  
2020 YA2   -     departed
Approximate diameter8 meters (H=28.165)
Closest Earth approach4.75 LD at 2106 UTC on 15 Dec. 2020 - Note: JPL reports an approach uncertainty of +/- 10 minutes
Inside ten LD of Earth7 to 24 Dec. 2020
Data based onJPL SSD orbit solution #1 downloaded from JPL on 21 Dec. 2020 UTC
based on 14 observations spanning one day
Optical observation  
  • reported from 3 observing codes during 21.610 hours: G96, H21, I52
  • designation assigned to Mt. Lemmon Survey observation at 0545 UTC 20 Dec. 2020
  • last observed at 0322 UTC on 21 Dec. 2020 by Steward Obs. Mt. Lemmon Station
Notesrisk, NHATS target
Links  
2020 YS1   -     departed
Approximate diameter20 meters (H=26.092)
Closest Earth approach3.84 LD at 2139 UTC on 13 Dec. 2020 - Note: JPL reports an approach uncertainty of +/- 2 minutes
Inside ten LD of Earth10 to 17 Dec. 2020
Data based onJPL SSD orbit solution #1 downloaded from JPL on 21 Dec. 2020 UTC
based on 15 observations spanning 5 days
Optical observation  
  • reported from 4 observing codes during 4.9288 days: 033, 703, G96, I52
  • first observed at 0927 UTC on 16 Dec. 2020 by the Catalina Sky Survey
  • designation assigned to Mt. Lemmon Survey observation at 0858 UTC 20 Dec. 2020
  • last observed at 0745 UTC on 21 Dec. 2020 by Steward Obs. Mt. Lemmon Station
Links  
2020 YN1   -     departed
Approximate diameter7 meters (H=28.505)
Closest Earth approach4.21 LD at 1618 UTC on 20 Dec. 2020 - Note: JPL reports an approach uncertainty of +/- 2 minutes
Inside ten LD of Earth14 to 26 Dec. 2020
Data based onJPL SSD orbit solution #1 downloaded from JPL on 21 Dec. 2020 UTC
based on 26 observations spanning one day
Optical observation  
  • reported from 5 observing codes during 23.969 hours: 033, 858, G96, I52, Z99
  • designation assigned to Mt. Lemmon Survey observation at 0601 UTC 20 Dec. 2020
  • last observed at 0559 UTC on 21 Dec. 2020 by Tebbutt Obs.
Links  
2020 YM1   -   outbound
Approximate diameter4 meters (H=29.645)
Closest Earth approach1.65 LD at 0053 UTC on 25 Dec. 2020 - Note: JPL reports an approach uncertainty of +/- 2 minutes
Inside Earth SOI22 to 27 Dec. 2020
Inside ten LD of Earth10 Dec. until 7 Jan. 2021
Closest Moon approach2.52 LD at 2233 UTC on 24 Dec. 2020
Data based onJPL SSD orbit solution #1 downloaded from JPL on 21 Dec. 2020 UTC
based on 15 observations spanning 2 days
Optical observation  
  • reported from 3 observing codes during 1.7688 days: 033, G96, V06
  • designation assigned to Mt. Lemmon Survey observation at 1025 UTC 19 Dec. 2020
  • last observed at 0452 UTC on 21 Dec. 2020 by Schwarzschild Obs. program code 1 via Schwarzschild Obs.
Notesrisk, NHATS target
Links  
2020 YJ1   -     departed
Approximate diameter53 meters (H=24.016)
Closest Earth approach9.96 LD at 2111 UTC on 15 Dec. 2020
Inside ten LD of Earth15 to 16 Dec. 2020
Data based onJPL SSD orbit solution #3 downloaded from JPL on 23 Dec. 2020 UTC
based on 51 observations spanning 3 days
Optical observation  
  • reported from 9 observing codes during 2.9092 days: 033, 113, 246, 703, 807, I52, J95, L01, T08
  • designation assigned to Catalina Sky Survey observation at 0607 UTC 19 Dec. 2020
  • last observed at 0357 UTC on 22 Dec. 2020 by Steward Obs. Mt. Lemmon Station
Links  
2020 YB1   -     departed
Approximate diameter15 meters (H=26.815)
Closest Earth approach7.90 LD at 0716 UTC on 23 Dec. 2020
Inside ten LD of Earth21 to 25 Dec. 2020
Data based onJPL SSD orbit solution #3 downloaded from JPL on 22 Dec. 2020 UTC
based on 37 observations spanning 5 days
Optical observation  
  • reported from 6 observing codes during 4.9333 days: 033, 246, F51, G96, I52, V06
  • first observed at 1243 UTC on 17 Dec. 2020 by Pan-STARRS 1
  • designation assigned to Mt. Lemmon Survey observation at 1006 UTC 18 Dec. 2020
  • last observed at 1107 UTC on 22 Dec. 2020 by Steward Obs. Mt. Lemmon Station
Notesrisk
Links  
2020 YA1   -   inbound
Approximate diameter15 meters (H=26.754)
Closest Earth approach4.05 LD at 1002 UTC on 3 Jan. 2021
Inside ten LD of Earth23 Dec. until 14 Jan. 2021
Data based onJPL SSD orbit solution #7 downloaded from JPL on 27 Dec. 2020 UTC
based on 59 observations spanning 10 days
Optical observation  
  • reported from 7 observing codes during 10.0472 days: 033, 691, G96, H21, H36, I52, V06
  • designation assigned to Mt. Lemmon Survey observation at 0942 UTC 17 Dec. 2020
  • last observed at 1050 UTC on 27 Dec. 2020 by Steward Obs. Mt. Lemmon Station
Notesrisk, NHATS target
Links  
2020 YU   -     departed
Approximate diameter27 meters (H=25.502)
Closest Earth approach3.15 LD at 0513 UTC on 20 Dec. 2020
Inside ten LD of Earth17 to 22 Dec. 2020
Data based onJPL SSD orbit solution #4 downloaded from JPL on 21 Dec. 2020 UTC
based on 44 observations spanning 3 days
Optical observation  
  • reported from 10 observing codes during 2.6856 days: 033, 113, 703, G96, I41, I52, J95, K87, N88, Z80
  • first observed at 0745 UTC on 17 Dec. 2020 by the Catalina Sky Survey
  • designation assigned to Mt. Lemmon Survey observation at 1042 UTC 18 Dec. 2020
  • last observed at 0012 UTC on 20 Dec. 2020 by Northolt Branch Obs.
Links  
2020 YO   -     departed
Approximate diameter5 meters (H=29.328)
Closest Earth approach1.98 LD at 1516 UTC on 14 Dec. 2020 - Note: JPL reports an approach uncertainty of +/- 5 minutes
Inside Earth SOI13 to 15 Dec. 2020
Inside ten LD of Earth9 to 19 Dec. 2020
Closest Moon approach2.73 LD at 1000 UTC on 14 Dec. 2020
Data based onJPL SSD orbit solution #2 downloaded from JPL on 18 Dec. 2020 UTC
based on 19 observations spanning one day
Optical observation  
  • reported from 4 observing codes during 24.305 hours: 033, G96, I52, V06
  • designation assigned to Mt. Lemmon Survey observation at 0836 UTC 17 Dec. 2020
  • last observed at 0855 UTC on 18 Dec. 2020 by the Catalina Sky Survey Kuiper Telescope
Links  
2020 YN   -     departed
Approximate diameter10 meters (H=27.689)
Closest Earth approach2.99 LD at 1239 UTC on 15 Dec. 2020
Inside ten LD of Earth12 to 18 Dec. 2020
Data based onJPL SSD orbit solution #4 downloaded from JPL on 22 Dec. 2020 UTC
based on 30 observations spanning 5 days
Optical observation  
  • reported from 7 observing codes during 5.0791 days: 033, 204, 291, G96, H21, I52, V06
  • designation assigned to Mt. Lemmon Survey observation at 0602 UTC 17 Dec. 2020
  • last observed at 0756 UTC on 22 Dec. 2020 by the Spacewatch 1.8m telescope
Notesrisk
Links  
2020 YG   -     departed
Approximate diameter7 meters (H=28.365)
Closest Earth approach1.15 LD at 1302 UTC on 20 Dec. 2020
Inside Earth SOI19 to 21 Dec. 2020
Inside ten LD of Earth15 to 25 Dec. 2020
Closest Moon approach1.91 LD at 0752 UTC on 20 Dec. 2020
Data based onJPL SSD orbit solution #4 downloaded from JPL on 20 Dec. 2020 UTC
based on 38 observations spanning 4 days
Optical observation  
  • reported from 8 observing codes during 3.8478 days: 033, 204, G96, H21, I52, J95, L34, V06
  • designation assigned to Mt. Lemmon Survey observation at 0355 UTC 16 Dec. 2020
  • last observed at 0016 UTC on 20 Dec. 2020 by Schwarzschild Obs. program code 1 via Schwarzschild Obs.
Links  
2020 YF   -   outbound
Approximate diameter6 meters (H=28.779)
Closest Earth approach1.16 LD at 0130 UTC on 18 Dec. 2020
Inside Earth SOI14 to 21 Dec. 2020
Inside ten LD of Earth2 Dec. until 2 Jan. 2021
Closest Moon approach1.30 LD at 0413 UTC on 20 Dec. 2020
Data based onJPL SSD orbit solution #6 downloaded from JPL on 23 Dec. 2020 UTC
based on 74 observations spanning 6 days
Optical observation  
  • reported from 14 observing codes during 5.8654 days: 033, 113, 204, 215, 703, 958, G34, H21, I52, J95, K74, K87, N88, V06
  • designation assigned to Catalina Sky Survey observation at 0503 UTC 17 Dec. 2020
  • last observed at 0150 UTC on 23 Dec. 2020 by the Catalina Sky Survey Kuiper Telescope
NotesNHATS target
Links  
2020 YB   -   outbound
Approximate diameter5 meters (H=28.952)
Closest Earth approach2.34 LD at 0808 UTC on 21 Dec. 2020
Inside Earth SOI20 to 21 Dec. 2020
Inside ten LD of Earth12 to 30 Dec. 2020
Data based onJPL SSD orbit solution #4 downloaded from JPL on 21 Dec. 2020 UTC
based on 55 observations spanning 5 days
Optical observation  
  • reported from 9 observing codes during 4.8206 days: 033, 595, 858, G96, H36, I52, J95, N88, Z99
  • designation assigned to Mt. Lemmon Survey observation at 0628 UTC 16 Dec. 2020
  • last observed at 0209 UTC on 21 Dec. 2020 by Steward Obs. Mt. Lemmon Station
NotesNHATS target
Links  
2020 XB7   -   approaching
Approximate diameter47 meters (H=24.273)
Closest Earth approach7.13 LD at 1918 UTC on 22 Jan. 2021 - Note: JPL reports an approach uncertainty of +/- 6.0167 hours
Inside ten LD of Earth19 to 26 Jan. 2021
Data based onJPL SSD orbit solution #2 downloaded from JPL on 19 Dec. 2020 UTC
based on 16 observations spanning 4 days
Optical observation  
  • reported from 4 observing codes during 3.8907 days: 291, 807, F51, H21
  • designation assigned to Pan-STARRS 1 observation at 0736 UTC 15 Dec. 2020
  • last observed at 0459 UTC on 19 Dec. 2020 by the Spacewatch 1.8m telescope
Links  
2020 XJ6   -     departed
Approximate diameter12 meters (H=27.297)
Closest Earth approach3.30 LD at 1644 UTC on 9 Dec. 2020 - Note: JPL reports an approach uncertainty of +/- 2 minutes
Inside ten LD of Earth5 to 14 Dec. 2020
Data based onJPL SSD orbit solution #3 downloaded from JPL on 19 Dec. 2020 UTC
based on 22 observations spanning 5 days
Optical observation  
  • reported from 4 observing codes during 4.7178 days: 033, G96, I52, L01
  • designation assigned to Mt. Lemmon Survey observation at 0816 UTC 14 Dec. 2020
  • last observed at 0129 UTC on 19 Dec. 2020 by Schwarzschild Obs. program code 1 via Schwarzschild Obs.
NotesNHATS target
Links  
2020 XH6   -     departed
Approximate diameter14 meters (H=26.885)
Closest Earth approach6.39 LD at 0227 UTC on 22 Dec. 2020
Inside ten LD of Earth18 to 25 Dec. 2020
Data based onJPL SSD orbit solution #6 downloaded from JPL on 21 Dec. 2020 UTC
based on 54 observations spanning 7 days
Optical observation  
  • reported from 6 observing codes during 6.9190 days: 033, I52, L01, V00, V06, Z99
  • designation assigned to Bok Telescope observation at 0728 UTC 14 Dec. 2020
  • last observed at 0531 UTC on 21 Dec. 2020 by Schwarzschild Obs. program code 1 via Schwarzschild Obs.
Links  
2020 XS5   -     departed
Approximate diameter16 meters (H=26.691)
Closest Earth approach8.25 LD at 1346 UTC on 16 Dec. 2020
Inside ten LD of Earth14 to 18 Dec. 2020
Data based onJPL SSD orbit solution #6 downloaded from JPL on 19 Dec. 2020 UTC
based on 38 observations spanning 9 days
Optical observation  
  • reported from 6 observing codes during 9.4378 days: 033, 595, G96, I52, K63, L01
  • first observed at 0739 UTC on 9 Dec. 2020 by the Mt. Lemmon Survey
  • designation assigned to Mt. Lemmon Survey observation at 0707 UTC 14 Dec. 2020
  • last observed at 1810 UTC on 18 Dec. 2020 by Schwarzschild Obs. program code 1 via Schwarzschild Obs.
Links  
2020 XG5   -     departed
Approximate diameter13 meters (H=27.112)
Closest Earth approach2.80 LD at 1853 UTC on 2 Dec. 2020 - Note: JPL reports an approach uncertainty of +/- 5 minutes
Inside ten LD of Earth24 Nov. until 11 Dec. 2020
Data based onJPL SSD orbit solution #4 downloaded from JPL on 21 Dec. 2020 UTC
based on 35 observations spanning 9 days
Optical observation  
  • reported from 6 observing codes during 8.9725 days: 204, F51, I52, J04, L01, V06
  • designation assigned to Pan-STARRS 1 observation at 1141 UTC 12 Dec. 2020
  • last observed at 1101 UTC on 21 Dec. 2020 by the Catalina Sky Survey Kuiper Telescope
NotesNHATS target
Links  
2020 XF5   -     departed
Approximate diameter28 meters (H=25.434)
Closest Earth approach7.99 LD at 0456 UTC on 15 Dec. 2020
Inside ten LD of Earth13 to 16 Dec. 2020
Data based onJPL SSD orbit solution #1 downloaded from JPL on 14 Dec. 2020 UTC
based on 14 observations spanning 3 days
Optical observation  
  • reported from 4 observing codes during 3.0570 days: 474, 807, F51, J04
  • first observed at 0939 UTC on 11 Dec. 2020 by Pan-STARRS 1
  • designation assigned to Pan-STARRS 1 observation at 0956 UTC 11 Dec. 2020
  • last observed at 1101 UTC on 14 Dec. 2020 by Mt. John Obs.
Links  
2020 XZ4   -   inbound
Approximate diameter36 meters (H=24.891)
Closest Earth approach5.39 LD at 1109 UTC on 29 Dec. 2020
Inside ten LD of Earth25 Dec. until 2 Jan. 2021
Data based onJPL SSD orbit solution #10 downloaded from JPL on 27 Dec. 2020 UTC
based on 78 observations spanning 16 days
Optical observation  
  • reported from 10 observing codes during 15.9814 days: 033, 204, 703, B49, F51, I52, J04, L01, T05, V01
  • designation assigned to Pan-STARRS 1 observation at 1105 UTC 11 Dec. 2020
  • last observed at 1038 UTC on 27 Dec. 2020 by Steward Obs. Mt. Lemmon Station
NotesNHATS target
Links  
2020 XY4   -     departed
Approximate diameter14 meters (H=26.899)
Closest Earth approach2.06 LD at 2226 UTC on 20 Dec. 2020
Inside Earth SOI20 to 21 Dec. 2020
Inside ten LD of Earth16 to 25 Dec. 2020
Closest Moon approach1.29 LD at 0521 UTC on 21 Dec. 2020
Data based onJPL SSD orbit solution #7 downloaded from JPL on 21 Dec. 2020 UTC
based on 75 observations spanning 10 days
Optical observation  
  • reported from 14 observing codes during 9.5073 days: 033, 104, 113, 204, 691, F51, F52, G96, I41, I52, J04, J95, L01, Z80
  • designation assigned to Pan-STARRS 2 observation at 1344 UTC 11 Dec. 2020
  • last observed at 0154 UTC on 21 Dec. 2020 by Steward Obs. Mt. Lemmon Station
NotesNHATS target
Links  
2020 XV4   -     departed
Approximate diameter28 meters (H=25.426)
Closest Earth approach6.36 LD at 0214 UTC on 10 Dec. 2020
Inside ten LD of Earth7 to 12 Dec. 2020
Data based onJPL SSD orbit solution #9 downloaded from JPL on 23 Dec. 2020 UTC
based on 83 observations spanning 11 days
Optical observation  
  • reported from 14 observing codes during 10.9579 days: 033, 204, 474, 595, 691, 695, 703, 807, F51, G96, I52, K63, L01, N88
  • designation assigned to Mt. Lemmon Survey observation at 0818 UTC 12 Dec. 2020
  • last observed at 0717 UTC on 23 Dec. 2020 by Spacewatch via Kitt Peak Natl. Obs.
Links  
2020 XU4   -     departed
Approximate diameter9 meters (H=27.841)
Closest Earth approach7.54 LD at 2136 UTC on 5 Dec. 2020 - Note: JPL reports an approach uncertainty of +/- 2 minutes
Inside ten LD of Earth1 to 9 Dec. 2020
Data based onJPL SSD orbit solution #3 downloaded from JPL on 20 Dec. 2020 UTC
based on 18 observations spanning 4 days
Optical observation  
  • reported from 6 observing codes during 4.2037 days: 291, J04, L01, T12, V00, V06
  • designation assigned to Bok Telescope observation at 0756 UTC 12 Dec. 2020
  • last observed at 1249 UTC on 16 Dec. 2020 by UH/Tholen NEO Follow-Up 2.24m Telescope
Notesrisk, NHATS target
Links  
2020 XF4   -     departed intruder
Approximate diameter10 meters (H=27.549)
Closest Earth approach0.89 LD at 1115 UTC on 16 Dec. 2020
Inside Earth-Moon system0405-1825 UTC on 16 Dec. 2020
Inside Earth SOI14 to 17 Dec. 2020
Inside ten LD of Earth9 to 23 Dec. 2020
Closest Moon approach0.34 LD at 0032 UTC on 17 Dec. 2020
Inside one LD of Moon1045 on 16 Dec. until 1411 UTC on 17 Dec. 2020
Data based onJPL SSD orbit solution #4 downloaded from JPL on 16 Dec. 2020 UTC
based on 68 observations spanning 10 days
Optical observation  
  • reported from 14 observing codes during 10.4462 days: 033, 703, B49, G96, I41, I52, J04, J69, J95, K88, L01, L34, T08, U68
  • first observed at 1027 UTC on 5 Dec. 2020 by the Mt. Lemmon Survey
  • designation assigned to Zwicky Transient Facility observation at 0712 UTC 10 Dec. 2020
  • last observed at 2110 UTC on 15 Dec. 2020 by Galhassin Robotic Telescope
Notesrisk, NHATS target
Links  
2020 XC4   -     departed
Approximate diameter21 meters (H=25.987)
Closest Earth approach6.34 LD at 1857 UTC on 13 Dec. 2020
Inside ten LD of Earth6 to 21 Dec. 2020
Data based onJPL SSD orbit solution #8 downloaded from JPL on 24 Dec. 2020 UTC
based on 66 observations spanning 15 days
Optical observation  
  • reported from 14 observing codes during 15.1141 days: 595, 695, B49, F51, F52, G96, H21, I52, J95, K87, L01, T05, Z80, Z99
  • designation assigned to Mt. Lemmon Survey observation at 0235 UTC 9 Dec. 2020
  • last observed at 0519 UTC on 24 Dec. 2020 by Spacewatch via Kitt Peak Natl. Obs.
NotesNHATS target
Links  
2020 XX3   -     departed intruder
Approximate diameter7 meters (H=28.472)
Closest Earth approach0.15 LD at 0640 UTC on 18 Dec. 2020
Inside Earth-Moon system0925 on 17 Dec. until 0355 UTC on 19 Dec. 2020
Inside Earth SOI16 to 20 Dec. 2020
Inside ten LD of Earth8 to 27 Dec. 2020
Closest Moon approach0.85 LD at 0709 UTC on 18 Dec. 2020
Inside one LD of Moon0014-1429 UTC on 18 Dec. 2020
Data based onJPL SSD orbit solution #9 downloaded from JPL on 21 Dec. 2020 UTC
based on 99 observations spanning 7 days
Optical observation  
  • reported from 17 observing codes during 7.6837 days: 033, 204, 291, 587, 691, F51, G96, H21, I52, J04, J95, K83, K87, L01, N88, T12, Z80
  • designation assigned to Pan-STARRS 1 observation at 0638 UTC 10 Dec. 2020
  • last observed at 2302 UTC on 17 Dec. 2020 by Schiaparelli Obs.
Notesrisk, NHATS target
Links  
2020 XJ3   -   outbound
Approximate diameter24 meters (H=25.719)
Closest Earth approach5.07 LD at 0241 UTC on 23 Dec. 2020
Inside ten LD of Earth16 to 29 Dec. 2020
Data based onJPL SSD orbit solution #9 downloaded from JPL on 21 Dec. 2020 UTC
based on 62 observations spanning 12 days
Optical observation  
  • reported from 8 observing codes during 11.5526 days: 033, 703, F51, H21, H36, I52, J04, L01
  • designation assigned to Pan-STARRS 1 observation at 1415 UTC 9 Dec. 2020
  • last observed at 0331 UTC on 21 Dec. 2020 by Schwarzschild Obs. program code 1 via Schwarzschild Obs.
NotesNHATS target
Links  
2020 XB3   -     departed
Approximate diameter11 meters (H=27.467)
Closest Earth approach3.24 LD at 1156 UTC on 12 Dec. 2020
Inside ten LD of Earth7 to 17 Dec. 2020
Data based onJPL SSD orbit solution #2 downloaded from JPL on 21 Dec. 2020 UTC
based on 32 observations spanning 4 days
Optical observation  
  • reported from 7 observing codes during 3.9594 days: 204, 474, G96, H21, I52, J04, L01
  • designation assigned to Mt. Lemmon Survey observation at 0527 UTC 9 Dec. 2020
  • last observed at 0428 UTC on 13 Dec. 2020 by Schiaparelli Obs.
Links  
2020 XH1   -     departed
Approximate diameter88 meters (H=22.938)
Closest Earth approach7.94 LD at 1533 UTC on 5 Dec. 2020
Inside ten LD of Earth3 to 7 Dec. 2020
Data based onJPL SSD orbit solution #15 downloaded from JPL on 24 Dec. 2020 UTC
based on 174 observations spanning 17 days
Optical observation  
  • reported from 19 observing codes during 17.0350 days: 703, 718, 807, 900, E23, G17, G33, G96, H45, I41, I52, P93, Q38, Q70, T05, T08, W46, W88, Z80
  • designation assigned to ATLAS Haleakala observation at 0758 UTC 6 Dec. 2020
  • last observed at 0848 UTC on 23 Dec. 2020 by the Mt. Lemmon Survey
Links  
2020 XB1   -     departed
Approximate diameter19 meters (H=26.221)
Closest Earth approach8.24 LD at 2032 UTC on 7 Dec. 2020
Inside ten LD of Earth4 to 11 Dec. 2020
Data based onJPL SSD orbit solution #5 downloaded from JPL on 18 Dec. 2020 UTC
based on 36 observations spanning 12 days
Optical observation  
  • reported from 6 observing codes during 12.1598 days: 033, 858, G96, I52, L04, X31
  • designation assigned to Mt. Lemmon Survey observation at 0630 UTC 6 Dec. 2020
  • last observed at 1020 UTC on 18 Dec. 2020 by Steward Obs. Mt. Lemmon Station
Links  
2020 XO   -     departed
Approximate diameter55 meters (H=23.957)
Closest Earth approach4.61 LD at 1217 UTC on 13 Dec. 2020
Inside ten LD of Earth10 to 16 Dec. 2020
Data based onJPL SSD orbit solution #7 downloaded from JPL on 21 Dec. 2020 UTC
based on 54 observations spanning 7 days
Optical observation  
  • reported from 13 observing codes during 7.4822 days: 033, 204, F52, H21, I52, J95, L04, T05, T08, V00, W34, Z80, Z99
  • designation assigned to Bok Telescope observation at 1037 UTC 5 Dec. 2020
  • last observed at 2211 UTC on 12 Dec. 2020 by Schiaparelli Obs.
Links  
2020 XN   -     departed
Approximate diameter41 meters (H=24.589)
Closest Earth approach4.07 LD at 1434 UTC on 12 Dec. 2020
Inside ten LD of Earth9 to 15 Dec. 2020
Data based onJPL SSD orbit solution #7 downloaded from JPL on 21 Dec. 2020 UTC
based on 76 observations spanning 8 days
Optical observation  
  • reported from 15 observing codes during 7.7651 days: 033, 204, 691, 703, G96, H21, H45, I52, J95, L04, T05, T08, V01, W34, Z80
  • designation assigned to Catalina Sky Survey observation at 0706 UTC 5 Dec. 2020
  • last observed at 0128 UTC on 13 Dec. 2020 by Steward Obs. Mt. Lemmon Station
Links  
2020 XH   -     departed
Approximate diameter42 meters (H=24.532)
Closest Earth approach5.78 LD at 0631 UTC on 4 Dec. 2020
Inside ten LD of Earth30 Nov. until 8 Dec. 2020
Data based onJPL SSD orbit solution #14 downloaded from JPL on 24 Dec. 2020 UTC
based on 130 observations spanning 20 days
Optical observation  
  • reported from 18 observing codes during 20.1177 days: 703, 718, 900, B49, E23, G96, H21, I41, I52, K88, L04, N88, Q70, T05, T08, V00, V01, Z80
  • first observed at 0829 UTC on 4 Dec. 2020 by the Zwicky Transient Facility
  • designation assigned to Catalina Sky Survey observation at 0835 UTC 4 Dec. 2020
  • last observed at 1119 UTC on 24 Dec. 2020 by Steward Obs. Mt. Lemmon Station
Links  
2020 XF   -     departed intruder
Approximate diameter15 meters (H=26.728)
Closest Earth approach0.23 LD at 0859 UTC on 3 Dec. 2020
Inside Earth-Moon system0441 on 2 Dec. until 1317 UTC on 4 Dec. 2020
Inside Earth SOI30 Nov. until 6 Dec. 2020
Inside ten LD of Earth20 Nov. until 16 Dec. 2020
Closest Moon approach0.92 LD at 1454 UTC on 3 Dec. 2020
Inside one LD of Moon0656-2351 UTC on 3 Dec. 2020
Data based onJPL SSD orbit solution #18 downloaded from JPL on 27 Dec. 2020 UTC
based on 98 observations spanning 23 days
Optical observation  
  • reported from 17 observing codes during 22.8071 days: 291, 691, 695, 703, 718, 900, F51, F52, H21, I52, J04, J95, K61, T08, V06, W46, Z80
  • first observed at 0750 UTC on 4 Dec. 2020 by Pan-STARRS 1
  • designation assigned to Catalina Sky Survey observation at 0436 UTC 5 Dec. 2020
  • last observed at 0312 UTC on 27 Dec. 2020 by Spacewatch via Kitt Peak Natl. Obs.
Notesrisk, NHATS target
Links  
2020 XB   -     departed
Approximate diameter31 meters (H=25.21)
Closest Earth approach2.93 LD at 0437 UTC on 30 Nov. 2020
Inside ten LD of Earth26 Nov. until 3 Dec. 2020
Data based onJPL SSD orbit solution #3 downloaded from JPL on 18 Dec. 2020 UTC
based on 36 observations spanning 16 days
Optical observation  
  • reported from 4 observing codes during 15.8429 days: 807, B49, I41, K88
  • designation assigned to Zwicky Transient Facility observation at 0940 UTC 1 Dec. 2020
  • last observed at 0553 UTC on 17 Dec. 2020 by Robert Holmes via Cerro Tololo Inter-American Obs.
Links  
2020 WZ5   -     departed
Approximate diameter19 meters (H=26.269)
Closest Earth approach6.57 LD at 2056 UTC on 10 Dec. 2020
Inside ten LD of Earth6 to 15 Dec. 2020
Data based onJPL SSD orbit solution #6 downloaded from JPL on 21 Dec. 2020 UTC
based on 32 observations spanning 22 days
Optical observation  
  • reported from 7 observing codes during 22.3543 days: 033, 204, H36, I52, L04, T05, W84
  • designation assigned to DECam program code 10 via DECam observation at 0232 UTC 24 Nov. 2020
  • last observed at 1102 UTC on 16 Dec. 2020 by Steward Obs. Mt. Lemmon Station
Links  
2020 WW5   -   outbound
Approximate diameter6 meters (H=28.71)
Closest Earth approach5.37 LD at 0445 UTC on 8 Dec. 2020
Inside ten LD of Earth4 Nov. until 4 Jan. 2021
Data based onJPL SSD orbit solution #6 downloaded from JPL on 24 Dec. 2020 UTC
based on 36 observations spanning 34 days
Optical observation  
  • reported from 6 observing codes during 33.9338 days: 291, 595, 807, F51, G96, I52
  • designation assigned to Pan-STARRS 1 observation at 0934 UTC 20 Nov. 2020
  • last observed at 0758 UTC on 24 Dec. 2020 by the Spacewatch 1.8m telescope
NotesNHATS target
Links  
2020 WG5   -     departed intruder
Approximate diameter10 meters (H=27.735)
Closest Earth approach0.94 LD at 0235 UTC on 26 Nov. 2020
Inside Earth-Moon system2038 on 25 Nov. until 0832 UTC on 26 Nov. 2020
Inside Earth SOI24 to 27 Nov. 2020
Inside ten LD of Earth18 Nov. until 3 Dec. 2020
Closest Moon approach0.95 LD at 1129 UTC on 26 Nov. 2020
Inside one LD of Moon0522-1736 UTC on 26 Nov. 2020
Data based onJPL SSD orbit solution #6 downloaded from JPL on 13 Dec. 2020 UTC
based on 52 observations spanning 14 days
Optical observation  
  • reported from 12 observing codes during 13.9425 days: 113, 291, 595, 691, 703, 718, H36, I52, J04, L01, T05, T08
  • designation assigned to Catalina Sky Survey observation at 0602 UTC 27 Nov. 2020
  • last observed at 0439 UTC on 11 Dec. 2020 by ESA Optical Ground Station program code 2 via ESA Optical Ground Station
Notesrisk, NHATS target
Links  
2020 WZ4   -     departed
Approximate diameter46 meters (H=24.334)
Closest Earth approach9.23 LD at 1610 UTC on 16 Nov. 2020
Inside ten LD of Earth15 to 18 Nov. 2020
Data based onJPL SSD orbit solution #10 downloaded from JPL on 21 Dec. 2020 UTC
based on 82 observations spanning 34 days
Optical observation  
  • reported from 15 observing codes during 33.9077 days: 203, 204, 246, 291, 595, 691, 703, 807, 858, F52, G96, I52, K38, L01, Z99
  • first observed at 1105 UTC on 17 Nov. 2020 by the Catalina Sky Survey
  • designation assigned to Mt. Lemmon Survey observation at 0533 UTC 25 Nov. 2020
  • last observed at 0852 UTC on 21 Dec. 2020 by the Spacewatch 1.8m telescope
Links  
2020 VV   -     departed
Approximate diameter12 meters (H=27.27)
Closest Earth approach8.39 LD at 0133 UTC on 21 Oct. 2020
Inside ten LD of Earth13 to 28 Oct. 2020
Data based onJPL SSD orbit solution #24 downloaded from JPL on 24 Dec. 2020 UTC
based on 79 observations spanning 61 days
Optical observation  
  • reported from 12 observing codes during 61.1124 days: 033, 291, 309, 691, 807, F52, G37, G96, H21, I52, T12, V06
  • first observed at 0508 UTC on 17 Oct. 2020 by Pan-STARRS 2
  • designation assigned to Mt. Lemmon Survey observation at 0333 UTC 5 Nov. 2020
  • last observed at 0750 UTC on 17 Dec. 2020 by Discovery Channel Telescope program code 5 via Discovery Channel Telescope
Notesrisk, NHATS target
Links  
2020 TB12   -   approaching
Approximate diameter151 meters (H=21.749)
Closest Earth approach6.75 LD at 0548 UTC on 1 Feb. 2021 - Note: JPL reports an approach uncertainty of +/- 3 minutes
Inside ten LD of Earth28 Jan. until 4 Feb. 2021
Data based onJPL SSD orbit solution #10 downloaded from JPL on 27 Dec. 2020 UTC
based on 53 observations spanning 73 days
Optical observation  
  • reported from 5 observing codes during 72.6532 days: 291, 691, 807, F51, I52
  • designation assigned to Pan-STARRS 1 observation at 1125 UTC 15 Oct. 2020
  • last observed at 0306 UTC on 27 Dec. 2020 by Steward Obs. Mt. Lemmon Station
Links  
2020 OK5   -     departed
Approximate diameter29 meters (H=25.308)
Closest Earth approach6.39 LD at 0857 UTC on 29 Oct. 2020
Inside ten LD of Earth26 Sept. until 1 Dec. 2020
Data based onJPL SSD orbit solution #38 downloaded from JPL on 28 Dec. 2020 UTC
based on 179 observations spanning 167 days
Optical observation  
  • reported from 19 observing codes during 166.6818 days: 204, 246, 291, 691, 703, 734, B67, F51, F52, G96, H36, I52, J04, K87, K88, K91, K93, T05, T08
  • first observed at 1327 UTC on 13 July 2020 by Pan-STARRS 1
  • designation assigned to Pan-STARRS 1 observation at 1106 UTC 18 July 2020
  • last observed at 0549 UTC on 27 Dec. 2020 by the Mt. Lemmon Survey
NotesNHATS target
Links  
2018 XE4   -     distant
Approximate diameter18 meters (H=26.4)
Closest Earth approach
Distance from Earth14.7 - 36.6 LD min-max during the observation period
Data based onJPL SSD orbit solution #6 downloaded from JPL on 20 Dec. 2020 UTC
based on 25 observations spanning 2018-2020
Optical observation  
  • reported from 3 observing codes during 10.3641 days: 033, F51, F52
  • first observed at 0935 UTC on 9 Dec. 2020 by Pan-STARRS 2
  • last observed at 1819 UTC on 19 Dec. 2020 by Schwarzschild Obs. program code 1 via Schwarzschild Obs.
Notesprevious passage Dec. 2018 at 5.27 LD +/- 1 mins. uncertainty
Links  
2016 AF2   -   outbound
Approximate diameter9 meters (H=27.9)
Closest Earth approach7.28 LD at 0742 UTC on 27 Dec. 2020 - Note: JPL reports an approach uncertainty of +/- 1.405 days
Inside ten LD of Earth21 Dec. until 1 Jan. 2021
Data based onJPL SSD orbit solution #7 downloaded from JPL on 15 Dec. 2020 UTC (dated 6 April 2017 local)
based on 22 observations spanning 12 days
Optical observation  
    none recent
Notesrisk, NHATS target
previous passage Dec. 2015 at 2.91 LD +/- 1 mins. uncertainty
Links  
501647 2014 SD224   -   outbound
Approximate diameter117 meters (H=22.3)
Closest Earth approach7.86 LD at 2019 UTC on 25 Dec. 2020
Inside ten LD of Earth23 to 28 Dec. 2020
Data based onJPL SSD orbit solution #55 downloaded from JPL on 27 Dec. 2020 UTC
based on 241 observations spanning 2014-2020
Optical observation  
  • reported from 15 observing codes during 32.3729 days: 113, 703, F52, G33, G40, G96, I41, J22, T05, T08, U68, U71, V39, Z21, Z80
  • first observed at 1107 UTC on 22 Nov. 2020 by the Mt. Lemmon Survey
  • last observed at 2004 UTC on 24 Dec. 2020 by Northolt Branch Obs.
NotesNHATS target
previous observation Aug.-Nov. 2014, observation Aug.-Oct. 2015, observation Aug.-Oct. 2016, observation Aug.-Oct. 2017, observation Oct.-Nov. 2018, and observation Oct.-Dec. 2019
Links  
2013 FK   -     distant
Approximate diameter74 meters (H=23.3)
Closest Earth approach
Distance from Earth56.3 - 107.4 LD min-max during the observation period
Data based onJPL SSD orbit solution #30 downloaded from JPL on 26 Dec. 2020 UTC
based on 102 observations spanning 2013-2020 including radar
Optical observation  
  • reported from 2 observing codes during 18.0735 days: 291, F51
  • first observed at 1210 UTC on 7 Dec. 2020 by the Spacewatch 1.8m telescope
  • last observed at 1356 UTC on 25 Dec. 2020 by Pan-STARRS 1
Notesradar target
previous passage March 2013 at 7.42 LD and passage Feb. 2017 at 7.10 LD
Links  
2012 UK171   -     distant
Approximate diameter45 meters (H=24.4)
Closest Earth approach
Distance from Earth16.3 - 54.1 LD min-max during the observation period
Data based onJPL SSD orbit solution #41 downloaded from JPL on 26 Dec. 2020 UTC
based on 258 observations spanning 2012-2020
Optical observation  
  • reported from 9 observing codes during 38.9028 days: 113, 291, 691, B67, G96, J22, Q64, T05, T08
  • first observed at 1029 UTC on 16 Nov. 2020 by the Spacewatch 1.8m telescope
  • last observed at 0809 UTC on 25 Dec. 2020 by ATLAS Mauna Loa
NotesNHATS target
previous passage Oct. 2012 at 7.41 LD and observation Nov.-Dec. 2016
Links  
2011 CL50   -   passing
Approximate diameter10 meters (H=27.6)
Closest Earth approach5.63 LD at 0952 UTC on 28 Dec. 2020
Inside ten LD of Earth16 Dec. until 8 Jan. 2021
Data based onJPL SSD orbit solution #11 downloaded from JPL on 28 Dec. 2020 UTC
based on 58 observations spanning 2011-2020
Optical observation  
  • reported from 7 observing codes during 2.8899 days: 203, 204, 595, G96, H21, I52, L01
  • first observed at 1026 UTC on 24 Dec. 2020 by the Mt. Lemmon Survey
  • designation assigned to Mt. Lemmon Survey observation at 0814 UTC 26 Dec. 2020
  • last observed at 0747 UTC on 27 Dec. 2020 by Steward Obs. Mt. Lemmon Station
Notesrisk, NHATS target, other ID: 2020 YN4
previous passage Feb. 2011 at 6.22 LD
Links  
1999 RM45   -   approaching
Approximate diameter446 meters (H=19.4)
Closest Earth approach7.62 LD at 1951 UTC on 2 March 2021
Inside ten LD of Earth1 to 4 March 2021
Data based onJPL SSD orbit solution #36 downloaded from JPL on 27 Dec. 2020 UTC
based on 97 observations spanning 1999-2020
Optical observation  
  • reported from 2 observing codes during 10.0518 days: 291, 691
  • first observed at 1104 UTC on 16 Dec. 2020 by the Spacewatch 0.9m telescope
  • last observed at 1219 UTC on 26 Dec. 2020 by the Spacewatch 1.8m telescope
Notesprevious observation Dec. 2007, observation Jan. 2008, observation Dec. 2009, and observation Sept. 2012
Links  

Footnotes

Illustration of ten lunar distances.

1. Ten lunar distances:  One "lunar distance" (LD) is the average distance between Earth and Moon (about 384,400 km., the same as 238,855 miles or 9.59 times around Earth's equator). Ten lunar distances has no special astronomical importance but is a useful giant traveling "bubble" within which to organize this special reporting. The approach of a small Solar-System body becomes more interesting when it nears or comes closer than 2.41 LD, as it encounters our planet's gravitational sphere of influence ( SOI). Earth's gravity can change the orbits of objects passing through its SOI. The Moon also has its own SOI, which changes as its distance from Earth varies, but never extends much more than 0.18 LD. (The simple illustration above, with Earth and Moon not to scale, shows the Earth SOI as a dotted vertical blue line.) The "Earth-Moon system" is generally defined as that region of space within a radius of one lunar distance from Earth, so an object can pass quite close to the Moon yet not be described as coming "inside" the E-M system.

2. Data credit:  All data on this page derived from orbit solutions comes from the NASA JPL Solar System Dynamics (SSD) Group through its Horizons system. All information about optical observations comes from the IAU Minor Planet Center (MPC) and info about radar observations comes from JPL SSD. The MPC, NASA, and JPL are not associated with this page or A/CC, and responsibility for the interpretation of this information and its use here rests entirely with A/CC. Important note: Approach times presented here as to-the-minute may have unstated uncertainties of a few minutes, or many minutes or even hours for objects with old or very short observation spans, which is significant because the Earth moves through its own diameter in about seven minutes. Thus actual encounter distances may vary, occasionally by as much as ten lunar distances. See JPL's Close Approach Tables for nominal vs. minimum possible passage distances and times, and for their note about uncertainties.

3. Size estimates:  Object diameters are rough approximations derived by standard formula from H, an object's "absolute magnitude" (brightness), where higher numbers represent dimmer (thus usually smaller) objects.