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Legend - object IDs plus links to more info

Data compiled at 2321 UTC on 23 Sept. 2018 for 61 known objects during a period of seven days from 20 to 26 Sept. 2018. White type highlights objects with just announced discovery.

Chart
ID

Full ID
Period
Closest
Passage
Uncertainty

Status
LQ22018 LQ213.30 LD  departed
PN222018 PN2223.46 LD  departed
PO222018 PO2283.12 LD  departed
PP92018 PP967.93 LD  departed
QS2018 QS89.01 LD  departed
QW12018 QW163.39 LD  departed
RA22018 RA210.44 LD  departed
RA62018 RA621.21 LD  departed
RB12018 RB115.56 LD  departed
RB22018 RB229.89 LD  departed
RB62018 RB611.64 LD  departed
RC2018 RC11.93 LD  departed intruder
RD42018 RD414.20 LD  departed
RD52018 RD512.29 LD  departed
RD62018 RD632.0 LD+/- 13 minutes  departed
RE2018 RE108.86 LD  departed
RE22018 RE226.34 LD  departed intruder
RE32018 RE315.03 LD  departed
RE42018 RE421.85 LD  departed
RE52018 RE516.74 LD  departed Moon buzzer
RE82018 RE813.69 LD  departed
RF22018 RF223.88 LD  departed
RF32018 RF326.80 LD  departed
RF52018 RF524.44 LD  departed
RF82018 RF83.04 LD  departed Moon buzzer
RG32018 RG324.36 LD  departed
RG52018 RG57.50 LD  departed
RG82018 RG85.95 LD  departed
RH32018 RH328.12 LD  departed
RH62018 RH68.57 LDoutbound
RJ32018 RJ322.34 LD  departed intruder
RK62018 RK64.36 LDoutbound
RM72018 RM711.21 LD  departed
RN12018 RN160.67 LD  departed
RN72018 RN713.58 LD  departed
RO12018 RO139.23 LD  departed
RO52018 RO517.02 LD  departed
RP52018 RP526.38 LD  departed
RQ12018 RQ14.06 LDinbound
RQ22018 RQ217.88 LD  departed
RR12018 RR116.35 LD  departed intruder
RR42018 RR415.14 LD  departed
RR52018 RR514.45 LD  departed
RT52018 RT516.39 LD  departed
RV272018 RV2726.04 LD  departed
RY32018 RY351.90 LD  departed
RY52018 RY538.86 LD  departed intruder
RZ2018 RZ105.01 LD  departed
RZ52018 RZ532.05 LD  departed intruder
SC2018 SC4.40 LD  departed intruder
SC12018 SC15.23 LDoutbound
SD12018 SD112.94 LD  departed
SJ12018 SJ15.35 LD  departed
SL12018 SL111.24 LD  departed
SL162017 SL168.50 LDoutbound
SM2018 SM9.37 LD  departed intruder
SM12018 SM16.83 LDinbound
SQ12018 SQ11.96 LD  departed
SS12018 SS16.54 LDapproaching
SW62015 SW623.29 LD  departed
VD122007 VD12239.4 LD  distant
DateTfc.Time
20 Sept. '18Rept. Line
21 Sept. '18Rept. Line
22 Sept. '18Rept. Line
23 Sept. '18Rept. Line
24 Sept. '18Rept. Line
25 Sept. '18 Line
26 Sept. '18 Line

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

2018 SS1   -   approaching
Approximate diameter65 meters (H=23.6)
Closest Earth approach6.51 LD at 0308 UTC on 27 Sept. 2018
Inside ten LD of Earth24 to 29 Sept. 2018
Data based onJPL SSD orbit solution #1 downloaded from JPL on 23 Sept. 2018 UTC
based on 20 observations spanning one day
Optical observation  
  • reported from 6 observing codes during 1.5874 days: 104, G96, J95, K63, L01, W34
  • designation assigned to Mt. Lemmon Survey observation at 0519 UTC 22 Sept. 2018
  • last observed at 1924 UTC on 23 Sept. 2018 by Great Shefford Obs.
Links  
2018 SQ1   -     departed
Approximate diameter16 meters (H=26.583)
Closest Earth approach1.96 LD at 0336 UTC on 20 Sept. 2018
Inside Earth SOI19 to 20 Sept. 2018
Inside ten LD of Earth17 to 22 Sept. 2018
Closest Moon approach2.88 LD at 0656 UTC on 20 Sept. 2018
Data based onJPL SSD orbit solution #1 downloaded from JPL on 22 Sept. 2018 UTC
based on 22 observations spanning one day
Optical observation  
  • reported from 4 observing codes during 1.1071 days: 703, H36, I52, K88
  • designation assigned to Catalina Sky Survey observation at 0619 UTC 21 Sept. 2018
  • last observed at 0853 UTC on 22 Sept. 2018 by Sandlot Obs.
Links  
2018 SM1   -   inbound
Approximate diameter93 meters (H=22.807)
Closest Earth approach6.80 LD at 1142 UTC on 27 Sept. 2018
Inside ten LD of Earth21 Sept. until 3 Oct. 2018
Data based onJPL SSD orbit solution #2 downloaded from JPL on 22 Sept. 2018 UTC
based on 118 observations spanning 39 days
Optical observation  
  • reported from 25 observing codes during 38.8483 days: 104, 113, 118, 160, 204, 673, 718, 850, 932, A17, C77, F51, G34, H21, J27, J95, K51, K63, K74, K88, L01, L04, T05, W34, Z80
  • first observed at 0905 UTC on 14 Aug. 2018 by Pan-STARRS 1
  • designation assigned to ATLAS Haleakala observation at 0840 UTC 18 Sept. 2018
  • last observed at 0526 UTC on 22 Sept. 2018 by Wiggins Obs.
NotesNHATS target
Links  
2018 SL1   -     departed
Approximate diameter20 meters (H=26.118)
Closest Earth approach9.48 LD at 2221 UTC on 16 Sept. 2018
Inside ten LD of Earth15 to 18 Sept. 2018
Data based onJPL SSD orbit solution #1 downloaded from JPL on 20 Sept. 2018 UTC
based on 15 observations spanning 3 days
Optical observation  
  • reported from 3 observing codes during 3.4825 days: H21, I41, K51
  • designation assigned to Palomar Transient Factory observation at 0819 UTC 17 Sept. 2018
  • last observed at 1954 UTC on 20 Sept. 2018 by Celado Obs.
Links  
2018 SJ1   -     departed
Approximate diameter34 meters (H=25.002)
Closest Earth approach1.66 LD at 1230 UTC on 18 Sept. 2018
Inside Earth SOI18 to 19 Sept. 2018
Inside ten LD of Earth15 to 21 Sept. 2018
Closest Moon approach2.41 LD at 1127 UTC on 18 Sept. 2018
Data based onJPL SSD orbit solution #1 downloaded from JPL on 20 Sept. 2018 UTC
based on 37 observations spanning 2 days
Optical observation  
  • reported from 6 observing codes during 2.7954 days: 595, I41, J95, K51, K88, L04
  • first observed at 0453 UTC on 15 Sept. 2018 by the Palomar Transient Factory
  • designation assigned to Palomar Transient Factory observation at 0544 UTC 17 Sept. 2018
  • last observed at 2358 UTC on 17 Sept. 2018 by Great Shefford Obs.
Links  
2018 SD1   -     departed
Approximate diameter40 meters (H=24.612)
Closest Earth approach8.23 LD at 0655 UTC on 17 Sept. 2018
Inside ten LD of Earth15 to 18 Sept. 2018
Data based onJPL SSD orbit solution #3 downloaded from JPL on 22 Sept. 2018 UTC
based on 83 observations spanning 4 days
Optical observation  
  • reported from 16 observing codes during 3.8714 days: 204, 585, 595, 850, A17, C47, G34, I41, I52, K61, K63, K88, L01, L04, T05, W34
  • first observed at 0622 UTC on 17 Sept. 2018 by the Palomar Transient Factory
  • designation assigned to ATLAS Haleakala observation at 1046 UTC 18 Sept. 2018
  • last observed at 0317 UTC on 21 Sept. 2018 by Steward Obs. Mt. Lemmon Station
Links  
2018 SC1   -   outbound
Approximate diameter10 meters (H=27.587)
Closest Earth approach4.04 LD at 0333 UTC on 18 Sept. 2018
Inside ten LD of Earth13 to 23 Sept. 2018
Data based onJPL SSD orbit solution #2 downloaded from JPL on 22 Sept. 2018 UTC
based on 25 observations spanning 4 days
Optical observation  
  • reported from 5 observing codes during 4.2115 days: 595, 703, H21, I52, L01
  • designation assigned to Catalina Sky Survey observation at 0527 UTC 18 Sept. 2018
  • last observed at 1032 UTC on 22 Sept. 2018 by Steward Obs. Mt. Lemmon Station
Notesrisk
Links  
2018 SM   -     departed intruder
Approximate diameter4 meters (H=29.392)
Closest Earth approach0.11 LD at 2228 UTC on 15 Sept. 2018
Inside Earth-Moon system1216 on 15 Sept. until 0840 UTC on 16 Sept. 2018
Inside Earth SOI14 to 16 Sept. 2018
Inside ten LD of Earth11 to 20 Sept. 2018
Closest Moon approach0.73 LD at 1343 UTC on 15 Sept. 2018
Inside one LD of Moon0619-2104 UTC on 15 Sept. 2018
Data based onJPL SSD orbit solution #1 downloaded from JPL on 18 Sept. 2018 UTC
based on 18 observations spanning 2 days
Optical observation  
  • reported from 4 observing codes during 1.9628 days: 703, I41, I52, V06
  • first observed at 0913 UTC on 16 Sept. 2018 by the Palomar Transient Factory
  • designation assigned to Catalina Sky Survey observation at 1002 UTC 16 Sept. 2018
  • last observed at 0820 UTC on 18 Sept. 2018 by the Catalina Sky Survey Kuiper Telescope
Links  
2018 SC   -     departed intruder
Approximate diameter9 meters (H=27.915)
Closest Earth approach0.70 LD at 1445 UTC on 18 Sept. 2018
Inside Earth-Moon system0917-2013 UTC on 18 Sept. 2018
Inside Earth SOI17 to 19 Sept. 2018
Inside ten LD of Earth15 to 21 Sept. 2018
Closest Moon approach1.23 LD at 1256 UTC on 18 Sept. 2018
Data based onJPL SSD orbit solution #2 downloaded from JPL on 19 Sept. 2018 UTC
based on 52 observations spanning one day
Optical observation  
  • reported from 12 observing codes during 19.927 hours: 595, 718, C95, H21, I52, J69, J95, K88, L01, L04, T05, Z80
  • designation assigned to ATLAS Haleakala observation at 1130 UTC 17 Sept. 2018
  • last observed at 0725 UTC on 18 Sept. 2018 by Steward Obs. Mt. Lemmon Station
Links  
2018 RV27   -     departed
Approximate diameter8 meters (H=28.154)
Closest Earth approach2.14 LD at 1047 UTC on 9 Sept. 2018
Inside Earth SOIduring 9 Sept. 2018
Inside ten LD of Earth5 to 13 Sept. 2018
Closest Moon approach2.50 LD at 1708 UTC on 9 Sept. 2018
Data based onJPL SSD orbit solution #1 downloaded from JPL on 21 Sept. 2018 UTC
based on 12 observations spanning 2 days
Optical observation  
  • reported from one observing code during 2.1142 days: I41
  • first observed at 0805 UTC on 7 Sept. 2018 by the Palomar Transient Factory
  • designation assigned to Palomar Transient Factory observation at 0752 UTC 8 Sept. 2018
  • last observed at 1049 UTC on 9 Sept. 2018 by the Palomar Transient Factory
Links  
2018 RG8   -     departed
Approximate diameter15 meters (H=26.743)
Closest Earth approach3.54 LD at 2244 UTC on 16 Sept. 2018
Inside ten LD of Earth10 to 22 Sept. 2018
Data based onJPL SSD orbit solution #4 downloaded from JPL on 19 Sept. 2018 UTC
based on 31 observations spanning 3 days
Optical observation  
  • reported from 7 observing codes during 3.0572 days: 703, 734, I41, I52, K88, L01, P93
  • designation assigned to Palomar Transient Factory observation at 0815 UTC 15 Sept. 2018
  • last observed at 0938 UTC on 18 Sept. 2018 by Steward Obs. Mt. Lemmon Station
Links  
2018 RF8   -     departed Moon buzzer
Approximate diameter24 meters (H=25.763)
Closest Earth approach1.37 LD at 0537 UTC on 19 Sept. 2018
Inside Earth SOI18 to 19 Sept. 2018
Inside ten LD of Earth16 to 22 Sept. 2018
Closest Moon approach0.60 LD at 0250 UTC on 19 Sept. 2018
Inside one LD of Moon2142 on 18 Sept. until 0759 UTC on 19 Sept. 2018
Data based onJPL SSD orbit solution #4 downloaded from JPL on 19 Sept. 2018 UTC
based on 70 observations spanning 3 days
Optical observation  
  • reported from 14 observing codes during 3.6202 days: 033, 104, 151, 595, 703, 718, A17, C47, H21, I52, K88, L01, T08, Z80
  • designation assigned to Catalina Sky Survey observation at 0548 UTC 15 Sept. 2018
  • last observed at 2041 UTC on 18 Sept. 2018 by Nonndorf Obs.
Links  
2018 RE8   -     departed
Approximate diameter13 meters (H=27.034)
Closest Earth approach1.23 LD at 2322 UTC on 13 Sept. 2018
Inside Earth SOI13 to 14 Sept. 2018
Inside ten LD of Earth9 to 18 Sept. 2018
Closest Moon approach1.62 LD at 1228 UTC on 13 Sept. 2018
Data based onJPL SSD orbit solution #1 downloaded from JPL on 17 Sept. 2018 UTC
based on 30 observations spanning 2 days
Optical observation  
  • reported from 8 observing codes during 1.9153 days: 104, 703, G96, H21, I41, I52, K88, L01
  • first observed at 1159 UTC on 14 Sept. 2018 by the Palomar Transient Factory
  • designation assigned to Palomar Transient Factory observation at 1201 UTC 14 Sept. 2018
  • last observed at 0957 UTC on 16 Sept. 2018 by the Catalina Sky Survey
Links  
2018 RN7   -     departed
Approximate diameter11 meters (H=27.451)
Closest Earth approach2.03 LD at 1824 UTC on 16 Sept. 2018
Inside Earth SOI16 to 17 Sept. 2018
Inside ten LD of Earth14 to 19 Sept. 2018
Closest Moon approach3.06 LD at 1817 UTC on 16 Sept. 2018
Data based onJPL SSD orbit solution #1 downloaded from JPL on 16 Sept. 2018 UTC
based on 21 observations spanning one day
Optical observation  
  • reported from 6 observing codes during 1.0593 days: 104, G96, H21, I52, J95, Q63
  • designation assigned to Mt. Lemmon Survey observation at 0619 UTC 14 Sept. 2018
  • last observed at 0745 UTC on 15 Sept. 2018 by ARO Westfield
Links  
2018 RM7   -     departed
Approximate diameter8 meters (H=28.123)
Closest Earth approach2.78 LD at 0516 UTC on 17 Sept. 2018
Inside ten LD of Earth14 to 19 Sept. 2018
Data based onJPL SSD orbit solution #1 downloaded from JPL on 16 Sept. 2018 UTC
based on 25 observations spanning one day
Optical observation  
  • reported from 6 observing codes during 23.798 hours: 104, 474, G96, H21, I52, J95
  • designation assigned to Mt. Lemmon Survey observation at 0546 UTC 14 Sept. 2018
  • last observed at 0534 UTC on 15 Sept. 2018 by Steward Obs. Mt. Lemmon Station
Links  
2018 RK6   -   outbound
Approximate diameter9 meters (H=27.97)
Closest Earth approach2.41 LD at 1034 UTC on 17 Sept. 2018
Inside ten LD of Earth10 to 24 Sept. 2018
Data based onJPL SSD orbit solution #3 downloaded from JPL on 16 Sept. 2018 UTC
based on 32 observations spanning 3 days
Optical observation  
  • reported from 7 observing codes during 3.0882 days: 104, 474, B04, G96, I52, J95, K63
  • designation assigned to Mt. Lemmon Survey observation at 0445 UTC 13 Sept. 2018
  • last observed at 0652 UTC on 16 Sept. 2018 by Steward Obs. Mt. Lemmon Station
NotesNHATS target
Links  
2018 RH6   -   outbound
Approximate diameter11 meters (H=27.474)
Closest Earth approach8.57 LD at 2054 UTC on 22 Sept. 2018
Inside ten LD of Earth19 to 26 Sept. 2018
Data based onJPL SSD orbit solution #4 downloaded from JPL on 18 Sept. 2018 UTC
based on 33 observations spanning 5 days
Optical observation  
  • reported from 5 observing codes during 5.0514 days: 291, 474, G96, H21, I52
  • designation assigned to Mt. Lemmon Survey observation at 0444 UTC 13 Sept. 2018
  • last observed at 0558 UTC on 18 Sept. 2018 by Steward Obs. Mt. Lemmon Station
NotesNHATS target
Links  
2018 RD6   -     departed
Approximate diameter9 meters (H=27.827)
Closest Earth approach4.83 LD at 2017 UTC on 4 Sept. 2018 - Note: JPL reports an approach uncertainty of +/- 13 minutes
Inside ten LD of Earth31 Aug. until 9 Sept. 2018
Data based onJPL SSD orbit solution #1 downloaded from JPL on 14 Sept. 2018 UTC
based on 13 observations spanning 2 days
Optical observation  
  • reported from 3 observing codes during 1.9496 days: G96, H21, I52
  • designation assigned to Mt. Lemmon Survey observation at 0616 UTC 12 Sept. 2018
  • last observed at 0503 UTC on 14 Sept. 2018 by ARO Westfield
Links  
2018 RB6   -     departed
Approximate diameter24 meters (H=25.769)
Closest Earth approach1.52 LD at 0457 UTC on 16 Sept. 2018
Inside Earth SOI15 to 16 Sept. 2018
Inside ten LD of Earth12 to 19 Sept. 2018
Closest Moon approach1.84 LD at 0400 UTC on 16 Sept. 2018
Data based onJPL SSD orbit solution #5 downloaded from JPL on 22 Sept. 2018 UTC
based on 105 observations spanning 2 days
Optical observation  
  • reported from 21 observing codes during 2.6146 days: 033, 104, 113, 160, 204, 246, 595, 703, 754, B04, B74, G96, H21, I52, J95, K63, K88, L01, L04, W34, W71
  • designation assigned to Mt. Lemmon Survey observation at 0513 UTC 12 Sept. 2018
  • last observed at 1958 UTC on 14 Sept. 2018 by Schwarzschild Obs.
Links  
2018 RA6   -     departed
Approximate diameter28 meters (H=25.43)
Closest Earth approach4.71 LD at 2309 UTC on 12 Sept. 2018
Inside ten LD of Earth9 to 15 Sept. 2018
Data based onJPL SSD orbit solution #1 downloaded from JPL on 14 Sept. 2018 UTC
based on 19 observations spanning one day
Optical observation  
  • reported from 2 observing codes during 1.7196 days: I41, J95
  • first observed at 0408 UTC on 11 Sept. 2018 by the Palomar Transient Factory
  • designation assigned to Palomar Transient Factory observation at 0315 UTC 12 Sept. 2018
  • last observed at 2124 UTC on 12 Sept. 2018 by Great Shefford Obs.
Links  
2018 RZ5   -     departed intruder
Approximate diameter4 meters (H=29.681)
Closest Earth approach0.13 LD at 2007 UTC on 12 Sept. 2018
Inside Earth-Moon system1448 on 12 Sept. until 0125 UTC on 13 Sept. 2018
Inside Earth SOI12 to 13 Sept. 2018
Inside ten LD of Earth10 to 15 Sept. 2018
Closest Moon approach0.52 LD at 1537 UTC on 12 Sept. 2018
Inside one LD of Moon1057-2017 UTC on 12 Sept. 2018
Data based onJPL SSD orbit solution #2 downloaded from JPL on 17 Sept. 2018 UTC
based on 20 observations spanning one day
Optical observation  
  • reported from 6 observing codes during 24.622 hours: 291, 691, 703, I52, Q63, Y28
  • designation assigned to Catalina Sky Survey observation at 0715 UTC 13 Sept. 2018
  • last observed at 0752 UTC on 14 Sept. 2018 by the Spacewatch 0.9m telescope
Links  
2018 RY5   -     departed intruder
Approximate diameter17 meters (H=26.517)
Closest Earth approach0.47 LD at 1711 UTC on 12 Sept. 2018
Inside Earth-Moon system1311-2110 UTC on 12 Sept. 2018
Inside Earth SOI12 to 13 Sept. 2018
Inside ten LD of Earth10 to 14 Sept. 2018
Closest Moon approach1.07 LD at 1334 UTC on 12 Sept. 2018
Data based onJPL SSD orbit solution #3 downloaded from JPL on 17 Sept. 2018 UTC
based on 51 observations spanning 4 days
Optical observation  
  • reported from 12 observing codes during 4.0834 days: 104, 474, 703, E23, G96, H06, H21, H36, I52, J95, Q62, V06
  • designation assigned to Catalina Sky Survey observation at 0638 UTC 13 Sept. 2018
  • last observed at 0838 UTC on 17 Sept. 2018 by the Catalina Sky Survey Kuiper Telescope
Links  
2018 RT5   -     departed
Approximate diameter21 meters (H=26.057)
Closest Earth approach1.64 LD at 0356 UTC on 12 Sept. 2018
Inside Earth SOI11 to 13 Sept. 2018
Inside ten LD of Earth7 to 16 Sept. 2018
Closest Moon approach1.53 LD at 1806 UTC on 11 Sept. 2018
Data based onJPL SSD orbit solution #4 downloaded from JPL on 22 Sept. 2018 UTC
based on 78 observations spanning 9 days
Optical observation  
  • reported from 14 observing codes during 9.0771 days: 104, 160, 595, 703, 718, H21, I41, I52, J95, K63, K88, L04, T08, Z80
  • first observed at 0645 UTC on 13 Sept. 2018 by the Palomar Transient Factory
  • designation assigned to ATLAS Mauna Loa observation at 1118 UTC 13 Sept. 2018
  • last observed at 0836 UTC on 22 Sept. 2018 by Steward Obs. Mt. Lemmon Station
Links  
2018 RR5   -     departed
Approximate diameter18 meters (H=26.32)
Closest Earth approach7.38 LD at 1227 UTC on 9 Sept. 2018
Inside ten LD of Earth3 to 15 Sept. 2018
Data based onJPL SSD orbit solution #5 downloaded from JPL on 22 Sept. 2018 UTC
based on 54 observations spanning 9 days
Optical observation  
  • reported from 6 observing codes during 8.9508 days: 474, 703, E23, I52, T05, T08
  • designation assigned to Catalina Sky Survey observation at 0637 UTC 13 Sept. 2018
  • last observed at 0527 UTC on 22 Sept. 2018 by Steward Obs. Mt. Lemmon Station
NotesNHATS target
Links  
2018 RP5   -     departed
Approximate diameter19 meters (H=26.295)
Closest Earth approach4.33 LD at 1404 UTC on 11 Sept. 2018
Inside ten LD of Earth8 to 14 Sept. 2018
Data based onJPL SSD orbit solution #5 downloaded from JPL on 18 Sept. 2018 UTC
based on 46 observations spanning 5 days
Optical observation  
  • reported from 9 observing codes during 5.0564 days: 104, 160, 291, 474, 703, G96, I52, J95, T12
  • designation assigned to Catalina Sky Survey observation at 0536 UTC 13 Sept. 2018
  • last observed at 0657 UTC on 18 Sept. 2018 by the Spacewatch 1.8m telescope
Notesrisk
Links  
2018 RO5   -     departed
Approximate diameter28 meters (H=25.429)
Closest Earth approach5.29 LD at 2201 UTC on 9 Sept. 2018
Inside ten LD of Earth4 to 15 Sept. 2018
Data based onJPL SSD orbit solution #6 downloaded from JPL on 20 Sept. 2018 UTC
based on 84 observations spanning 7 days
Optical observation  
  • reported from 17 observing codes during 7.5014 days: 033, 104, 113, 246, 595, 703, A17, G34, H21, I52, J69, J95, K63, L01, L04, T05, Z80
  • designation assigned to Catalina Sky Survey observation at 0857 UTC 12 Sept. 2018
  • last observed at 2059 UTC on 19 Sept. 2018 by Guidestar Obs.
NotesNHATS target
Links  
2018 RG5   -     departed
Approximate diameter15 meters (H=26.732)
Closest Earth approach4.49 LD at 1828 UTC on 16 Sept. 2018
Inside ten LD of Earth11 to 21 Sept. 2018
Data based onJPL SSD orbit solution #4 downloaded from JPL on 18 Sept. 2018 UTC
based on 46 observations spanning 6 days
Optical observation  
  • reported from 7 observing codes during 6.1898 days: 033, 246, 703, H36, I52, J95, L01
  • designation assigned to Catalina Sky Survey observation at 0610 UTC 12 Sept. 2018
  • last observed at 1043 UTC on 18 Sept. 2018 by Steward Obs. Mt. Lemmon Station
NotesNHATS target
Links  
2018 RF5   -     departed
Approximate diameter11 meters (H=27.366)
Closest Earth approach7.93 LD at 1857 UTC on 8 Sept. 2018
Inside ten LD of Earth5 to 11 Sept. 2018
Data based onJPL SSD orbit solution #6 downloaded from JPL on 18 Sept. 2018 UTC
based on 48 observations spanning 6 days
Optical observation  
  • reported from 9 observing codes during 6.1670 days: 033, 291, 926, G96, I52, J95, L01, T12, V06
  • designation assigned to Mt. Lemmon Survey observation at 0545 UTC 12 Sept. 2018
  • last observed at 0945 UTC on 18 Sept. 2018 by the Catalina Sky Survey Kuiper Telescope
Notesrisk
Links  
2018 RE5   -     departed Moon buzzer
Approximate diameter11 meters (H=27.401)
Closest Earth approach1.48 LD at 0346 UTC on 15 Sept. 2018
Inside Earth SOI14 to 15 Sept. 2018
Inside ten LD of Earth12 to 18 Sept. 2018
Closest Moon approach0.97 LD at 0344 UTC on 15 Sept. 2018
Inside one LD of Moon0208-0518 UTC on 15 Sept. 2018
Data based onJPL SSD orbit solution #4 downloaded from JPL on 16 Sept. 2018 UTC
based on 33 observations spanning 2 days
Optical observation  
  • reported from 7 observing codes during 2.2057 days: 033, 474, G96, H36, I52, J95, L01
  • designation assigned to Mt. Lemmon Survey observation at 0358 UTC 12 Sept. 2018
  • last observed at 0854 UTC on 14 Sept. 2018 by Mt. John Obs.
Links  
2018 RD5   -     departed
Approximate diameter23 meters (H=25.887)
Closest Earth approach4.39 LD at 0241 UTC on 12 Sept. 2018
Inside ten LD of Earth5 to 18 Sept. 2018
Data based onJPL SSD orbit solution #8 downloaded from JPL on 22 Sept. 2018 UTC
based on 120 observations spanning 11 days
Optical observation  
  • reported from 19 observing codes during 11.0746 days: 113, 246, 585, 595, 703, C95, G34, H06, I41, I52, J69, J95, K74, L01, L04, T05, T08, Z43, Z80
  • designation assigned to Palomar Transient Factory observation at 0636 UTC 11 Sept. 2018
  • last observed at 0823 UTC on 22 Sept. 2018 by Steward Obs. Mt. Lemmon Station
NotesNHATS target
Links  
2018 RR4   -     departed
Approximate diameter13 meters (H=27.094)
Closest Earth approach3.22 LD at 1258 UTC on 12 Sept. 2018
Inside ten LD of Earth7 to 17 Sept. 2018
Data based onJPL SSD orbit solution #3 downloaded from JPL on 16 Sept. 2018 UTC
based on 27 observations spanning 2 days
Optical observation  
  • reported from 6 observing codes during 1.7466 days: I41, I52, J95, L01, Q33, Q66
  • first observed at 0856 UTC on 11 Sept. 2018 by the Palomar Transient Factory
  • designation assigned to JAXA Janess-G observation at 1221 UTC 11 Sept. 2018
  • last observed at 0251 UTC on 13 Sept. 2018 by Great Shefford Obs.
Links  
2018 RE4   -     departed
Approximate diameter13 meters (H=27.088)
Closest Earth approach6.83 LD at 0945 UTC on 5 Sept. 2018
Inside ten LD of Earth31 Aug. until 10 Sept. 2018
Data based onJPL SSD orbit solution #3 downloaded from JPL on 19 Sept. 2018 UTC
based on 23 observations spanning 8 days
Optical observation  
  • reported from 5 observing codes during 8.0144 days: G96, H21, I52, L01, V06
  • designation assigned to Mt. Lemmon Survey observation at 0745 UTC 10 Sept. 2018
  • last observed at 0806 UTC on 18 Sept. 2018 by ARO Westfield
NotesNHATS target
Links  
2018 RD4   -     departed
Approximate diameter7 meters (H=28.35)
Closest Earth approach2.28 LD at 1413 UTC on 9 Sept. 2018
Inside Earth SOI9 to 10 Sept. 2018
Inside ten LD of Earth2 to 16 Sept. 2018
Data based onJPL SSD orbit solution #1 downloaded from JPL on 11 Sept. 2018 UTC
based on 24 observations spanning one day
Optical observation  
  • reported from 6 observing codes during 1.3867 days: 104, 204, 474, 703, I52, L01
  • designation assigned to Catalina Sky Survey observation at 0525 UTC 10 Sept. 2018
  • last observed at 1441 UTC on 11 Sept. 2018 by Mt. John Obs.
NotesNHATS target
Links  
2018 RY3   -     departed
Approximate diameter29 meters (H=25.334)
Closest Earth approach4.40 LD at 1057 UTC on 8 Sept. 2018
Inside ten LD of Earth6 to 10 Sept. 2018
Data based onJPL SSD orbit solution #6 downloaded from JPL on 17 Sept. 2018 UTC
based on 68 observations spanning 6 days
Optical observation  
  • reported from 16 observing codes during 6.0717 days: 104, 160, 204, 291, 474, 587, 595, 691, 703, E23, G96, I52, K63, L01, L04, T12
  • designation assigned to Catalina Sky Survey observation at 0352 UTC 10 Sept. 2018
  • last observed at 0535 UTC on 16 Sept. 2018 by the Spacewatch 1.8m telescope
Links  
2018 RJ3   -     departed intruder
Approximate diameter9 meters (H=27.824)
Closest Earth approach0.44 LD at 2141 UTC on 7 Sept. 2018
Inside Earth-Moon system1000 on 7 Sept. until 0923 UTC on 8 Sept. 2018
Inside Earth SOI6 to 9 Sept. 2018
Inside ten LD of Earth2 to 13 Sept. 2018
Closest Moon approach0.78 LD at 1505 UTC on 7 Sept. 2018
Inside one LD of Moon0742-2225 UTC on 7 Sept. 2018
Data based onJPL SSD orbit solution #6 downloaded from JPL on 17 Sept. 2018 UTC
based on 48 observations spanning 8 days
Optical observation  
  • reported from 11 observing codes during 7.8147 days: 291, 474, 691, E23, H36, I52, J04, L01, T05, T12, V06
  • designation assigned to ATLAS Haleakala observation at 1336 UTC 9 Sept. 2018
  • last observed at 0910 UTC on 17 Sept. 2018 by the Catalina Sky Survey Kuiper Telescope
Notesrisk, NHATS target
Links  
2018 RH3   -     departed
Approximate diameter20 meters (H=26.108)
Closest Earth approach1.90 LD at 0909 UTC on 5 Sept. 2018
Inside Earth SOI4 to 6 Sept. 2018
Inside ten LD of Earth31 Aug. until 10 Sept. 2018
Closest Moon approach2.17 LD at 0256 UTC on 5 Sept. 2018
Data based onJPL SSD orbit solution #7 downloaded from JPL on 17 Sept. 2018 UTC
based on 78 observations spanning 8 days
Optical observation  
  • reported from 15 observing codes during 7.8203 days: 104, 151, 291, 474, 595, 691, E23, G96, H36, I52, J04, K30, L01, T05, T12
  • designation assigned to ATLAS Haleakala observation at 1032 UTC 9 Sept. 2018
  • last observed at 0613 UTC on 17 Sept. 2018 by the Spacewatch 0.9m telescope
NotesNHATS target
Links  
2018 RG3   -     departed
Approximate diameter20 meters (H=26.152)
Closest Earth approach9.02 LD at 1058 UTC on 6 Sept. 2018
Inside ten LD of Earth3 to 9 Sept. 2018
Data based onJPL SSD orbit solution #4 downloaded from JPL on 22 Sept. 2018 UTC
based on 52 observations spanning 11 days
Optical observation  
  • reported from 10 observing codes during 11.0651 days: 104, 595, 711, A17, G96, H21, H36, I52, L01, V06
  • designation assigned to Mt. Lemmon Survey observation at 0629 UTC 9 Sept. 2018
  • last observed at 0803 UTC on 20 Sept. 2018 by ARO Westfield
Links  
2018 RF3   -     departed
Approximate diameter14 meters (H=26.945)
Closest Earth approach1.99 LD at 2207 UTC on 7 Sept. 2018
Inside Earth SOI7 to 8 Sept. 2018
Inside ten LD of Earth3 to 12 Sept. 2018
Closest Moon approach2.85 LD at 1935 UTC on 7 Sept. 2018
Data based onJPL SSD orbit solution #1 downloaded from JPL on 10 Sept. 2018 UTC
based on 39 observations spanning one day
Optical observation  
  • reported from 9 observing codes during 23.861 hours: 104, 151, 595, 703, A17, H36, I52, J04, L01
  • designation assigned to Catalina Sky Survey observation at 0627 UTC 9 Sept. 2018
  • last observed at 0619 UTC on 10 Sept. 2018 by Sandlot Obs.
Links  
2018 RE3   -     departed
Approximate diameter13 meters (H=27.142)
Closest Earth approach1.84 LD at 1243 UTC on 13 Sept. 2018
Inside Earth SOI12 to 14 Sept. 2018
Inside ten LD of Earth9 to 17 Sept. 2018
Closest Moon approach1.55 LD at 1710 UTC on 13 Sept. 2018
Data based onJPL SSD orbit solution #5 downloaded from JPL on 14 Sept. 2018 UTC
based on 42 observations spanning 4 days
Optical observation  
  • reported from 9 observing codes during 3.9468 days: 104, 703, G96, H36, I41, I52, J04, J95, L01
  • designation assigned to Catalina Sky Survey observation at 0609 UTC 9 Sept. 2018
  • last observed at 0452 UTC on 13 Sept. 2018 by the Palomar Transient Factory
NotesNHATS target
Links  
2018 RQ2   -     departed
Approximate diameter89 meters (H=22.911)
Closest Earth approach9.74 LD at 0814 UTC on 15 Sept. 2018
Inside ten LD of Earth14 to 16 Sept. 2018
Data based onJPL SSD orbit solution #7 downloaded from JPL on 17 Sept. 2018 UTC
based on 136 observations spanning 9 days
Optical observation  
  • reported from 27 observing codes during 9.0153 days: 104, 108, 113, 151, 160, 204, 595, 703, 718, A17, C47, G34, G40, I41, I52, J04, J69, K30, K38, K61, K63, K74, K83, L01, T05, W34, Z80
  • designation assigned to ATLAS Haleakala observation at 1108 UTC 7 Sept. 2018
  • last observed at 1130 UTC on 16 Sept. 2018 by the Palomar Transient Factory
Links  
2018 RF2   -     departed
Approximate diameter9 meters (H=27.825)
Closest Earth approach4.01 LD at 0857 UTC on 10 Sept. 2018
Inside ten LD of Earth6 to 14 Sept. 2018
Data based onJPL SSD orbit solution #2 downloaded from JPL on 9 Sept. 2018 UTC
based on 25 observations spanning one day
Optical observation  
  • reported from 7 observing codes during 1.6545 days: 104, 151, 474, G96, I52, K63, L01
  • designation assigned to Mt. Lemmon Survey observation at 0741 UTC 7 Sept. 2018
  • last observed at 2323 UTC on 8 Sept. 2018 by Pascoli Obs.
Links  
2018 RE2   -     departed intruder
Approximate diameter7 meters (H=28.479)
Closest Earth approach0.99 LD at 1005 UTC on 6 Sept. 2018
Inside Earth-Moon system0825-1145 UTC on 6 Sept. 2018
Inside Earth SOI5 to 7 Sept. 2018
Inside ten LD of Earth1 to 11 Sept. 2018
Closest Moon approach1.90 LD at 0758 UTC on 6 Sept. 2018
Data based onJPL SSD orbit solution #2 downloaded from JPL on 9 Sept. 2018 UTC
based on 17 observations spanning 2 days
Optical observation  
  • reported from 5 observing codes during 1.7673 days: 204, I41, I52, J04, K63
  • first observed at 0628 UTC on 7 Sept. 2018 by the Palomar Transient Factory
  • designation assigned to Palomar Transient Factory observation at 0730 UTC 7 Sept. 2018
  • last observed at 0053 UTC on 9 Sept. 2018 by Schiaparelli Obs.
Links  
2018 RB2   -     departed
Approximate diameter12 meters (H=27.286)
Closest Earth approach1.47 LD at 1536 UTC on 5 Sept. 2018
Inside Earth SOI4 to 6 Sept. 2018
Inside ten LD of Earth31 Aug. until 10 Sept. 2018
Closest Moon approach2.40 LD at 1351 UTC on 5 Sept. 2018
Data based onJPL SSD orbit solution #9 downloaded from JPL on 18 Sept. 2018 UTC
based on 55 observations spanning 9 days
Optical observation  
  • reported from 12 observing codes during 9.1891 days: 104, 160, 291, 595, H21, I41, I52, J04, J95, K63, L01, T12
  • designation assigned to Palomar Transient Factory observation at 0628 UTC 7 Sept. 2018
  • last observed at 1100 UTC on 16 Sept. 2018 by the Spacewatch 1.8m telescope
Notesrisk
Links  
2018 RA2   -     departed
Approximate diameter27 meters (H=25.497)
Closest Earth approach8.00 LD at 1904 UTC on 16 Sept. 2018
Inside ten LD of Earth13 to 19 Sept. 2018
Data based onJPL SSD orbit solution #7 downloaded from JPL on 15 Sept. 2018 UTC
based on 52 observations spanning 7 days
Optical observation  
  • reported from 9 observing codes during 7.6077 days: 104, 160, 474, A17, B04, G96, I52, K63, L01
  • designation assigned to Mt. Lemmon Survey observation at 0604 UTC 7 Sept. 2018
  • last observed at 2039 UTC on 14 Sept. 2018 by Castelmartini Obs.
NotesNHATS target
Links  
2018 RR1   -     departed intruder
Approximate diameter3 meters (H=29.945)
Closest Earth approach0.94 LD at 2150 UTC on 3 Sept. 2018
Inside Earth-Moon system1400 on 3 Sept. until 0540 UTC on 4 Sept. 2018
Inside Earth SOI1 to 6 Sept. 2018
Inside ten LD of Earth24 Aug. until 13 Sept. 2018
Closest Moon approach0.99 LD at 2158 UTC on 3 Sept. 2018
Inside one LD of Moon1918 on 3 Sept. until 0039 UTC on 4 Sept. 2018
Data based onJPL SSD orbit solution #6 downloaded from JPL on 18 Sept. 2018 UTC
based on 34 observations spanning 8 days
Optical observation  
  • reported from 7 observing codes during 8.0739 days: 291, 474, G96, H21, J04, T12, V06
  • designation assigned to Mt. Lemmon Survey observation at 0926 UTC 7 Sept. 2018
  • last observed at 1112 UTC on 15 Sept. 2018 by UH/Tholen NEO Follow-Up 2.24m Telescope
Notesrisk, NHATS target
Links  
2018 RQ1   -   inbound
Approximate diameter51 meters (H=24.109)
Closest Earth approach4.06 LD at 2255 UTC on 24 Sept. 2018
Inside ten LD of Earth11 Sept. until 8 Oct. 2018
Data based onJPL SSD orbit solution #10 downloaded from JPL on 22 Sept. 2018 UTC
based on 106 observations spanning 13 days
Optical observation  
  • reported from 16 observing codes during 13.1988 days: 474, 691, 703, A17, G96, H06, I52, J04, K61, L01, Q62, T05, T08, T12, U69, W88
  • designation assigned to Catalina Sky Survey observation at 0907 UTC 7 Sept. 2018
  • last observed at 1354 UTC on 20 Sept. 2018 by ATLAS Haleakala
NotesNHATS target
Links  
2018 RO1   -     departed
Approximate diameter13 meters (H=27.013)
Closest Earth approach4.23 LD at 1403 UTC on 4 Sept. 2018
Inside ten LD of Earth31 Aug. until 8 Sept. 2018
Data based onJPL SSD orbit solution #5 downloaded from JPL on 14 Sept. 2018 UTC
based on 36 observations spanning 6 days
Optical observation  
  • reported from 6 observing codes during 5.9830 days: 474, 703, G96, H21, I52, L01
  • designation assigned to Catalina Sky Survey observation at 0602 UTC 7 Sept. 2018
  • last observed at 0537 UTC on 13 Sept. 2018 by ARO Westfield
Links  
2018 RN1   -     departed
Approximate diameter29 meters (H=25.338)
Closest Earth approach8.98 LD at 1932 UTC on 30 Aug. 2018
Inside ten LD of Earth29 Aug. until 1 Sept. 2018
Data based onJPL SSD orbit solution #3 downloaded from JPL on 16 Sept. 2018 UTC
based on 35 observations spanning 10 days
Optical observation  
  • reported from 7 observing codes during 10.0424 days: 104, 474, G96, I52, K63, L01, V06
  • designation assigned to Mt. Lemmon Survey observation at 0716 UTC 6 Sept. 2018
  • last observed at 0817 UTC on 16 Sept. 2018 by the Catalina Sky Survey Kuiper Telescope
Links  
2018 RB1   -     departed
Approximate diameter10 meters (H=27.652)
Closest Earth approach2.45 LD at 1419 UTC on 11 Sept. 2018
Inside ten LD of Earth6 to 16 Sept. 2018
Data based onJPL SSD orbit solution #4 downloaded from JPL on 10 Sept. 2018 UTC
based on 41 observations spanning 4 days
Optical observation  
  • reported from 7 observing codes during 3.7780 days: 104, 204, 474, G96, I52, J04, L01
  • designation assigned to Mt. Lemmon Survey observation at 0824 UTC 6 Sept. 2018
  • last observed at 0305 UTC on 10 Sept. 2018 by Steward Obs. Mt. Lemmon Station
NotesNHATS target
Links  
2018 RZ   -     departed
Approximate diameter42 meters (H=24.552)
Closest Earth approach8.66 LD at 0806 UTC on 31 Aug. 2018
Inside ten LD of Earth30 Aug. until 1 Sept. 2018
Data based onJPL SSD orbit solution #6 downloaded from JPL on 18 Sept. 2018 UTC
based on 31 observations spanning 8 days
Optical observation  
  • reported from 6 observing codes during 7.8446 days: 474, G96, H21, I52, J04, V06
  • designation assigned to Mt. Lemmon Survey observation at 0642 UTC 6 Sept. 2018
  • last observed at 0258 UTC on 14 Sept. 2018 by ARO Westfield
Links  
2018 RE   -     departed
Approximate diameter45 meters (H=24.362)
Closest Earth approach5.93 LD at 0102 UTC on 31 Aug. 2018
Inside ten LD of Earth29 Aug. until 1 Sept. 2018
Data based onJPL SSD orbit solution #6 downloaded from JPL on 15 Sept. 2018 UTC
based on 49 observations spanning 11 days
Optical observation  
  • reported from 8 observing codes during 10.9785 days: 204, 291, 474, 703, 807, H21, I52, L01
  • designation assigned to Catalina Sky Survey observation at 0527 UTC 4 Sept. 2018
  • last observed at 0456 UTC on 15 Sept. 2018 by the Spacewatch 1.8m telescope
Links  
2018 RC   -     departed intruder
Approximate diameter36 meters (H=24.858)
Closest Earth approach0.58 LD at 1208 UTC on 9 Sept. 2018
Inside Earth-Moon system1917 on 8 Sept. until 0458 UTC on 10 Sept. 2018
Inside Earth SOI7 to 11 Sept. 2018
Inside ten LD of Earth31 Aug. until 18 Sept. 2018
Closest Moon approach0.95 LD at 1056 UTC on 10 Sept. 2018
Inside one LD of Moon0346-1801 UTC on 10 Sept. 2018
Data based onJPL SSD orbit solution #20 downloaded from JPL on 15 Sept. 2018 UTC
based on 232 observations spanning 8 days including radar
Optical observation  
  • reported from 32 observing codes during 7.7513 days: 073, 104, 108, 113, 160, 204, 474, 587, 595, 703, 718, A17, A53, C77, G34, G96, H21, J04, J69, J95, K63, K82, L01, P93, T08, T12, U69, W85, W87, X31, Y00, Z80
  • designation assigned to ATLAS Mauna Loa observation at 1403 UTC 3 Sept. 2018
  • last observed at 0805 UTC on 11 Sept. 2018 by Mt. John Obs.
Radar observation  
  • observed 5 times from one location during 0.0486 days
  • first observed at 1110 UTC on 6 Sept. 2018 by Goldstone DSS-14 70m antenna
  • last observed at 1220 UTC on 6 Sept. 2018 by Goldstone DSS-14 70m antenna
NotesNHATS target
Links  
2018 QW1   -     departed
Approximate diameter112 meters (H=22.396)
Closest Earth approach9.11 LD at 2202 UTC on 30 Aug. 2018
Inside ten LD of Earth29 Aug. until 1 Sept. 2018
Data based onJPL SSD orbit solution #8 downloaded from JPL on 17 Sept. 2018 UTC
based on 57 observations spanning 12 days
Optical observation  
  • reported from 13 observing codes during 12.6076 days: 160, 204, 246, 587, 595, 718, 850, H06, H21, I52, T05, T08, W34
  • designation assigned to ATLAS Haleakala observation at 0559 UTC 31 Aug. 2018
  • last observed at 2034 UTC on 12 Sept. 2018 by KLENOT
Links  
2018 QS   -     departed
Approximate diameter19 meters (H=26.239)
Closest Earth approach4.49 LD at 1133 UTC on 14 Aug. 2018
Inside ten LD of Earth10 to 18 Aug. 2018
Data based onJPL SSD orbit solution #11 downloaded from JPL on 16 Sept. 2018 UTC
based on 74 observations spanning 28 days
Optical observation  
  • reported from 15 observing codes during 27.9802 days: 104, 204, 291, 595, E23, F51, H21, I19, J95, K87, K88, L01, T08, T12, W34
  • designation assigned to ATLAS Mauna Loa observation at 1130 UTC 18 Aug. 2018
  • last observed at 1102 UTC on 15 Sept. 2018 by UH/Tholen NEO Follow-Up 2.24m Telescope
Notesrisk
Links  
2018 PO22   -     departed
Approximate diameter84 meters (H=23.021)
Closest Earth approach8.85 LD at 0842 UTC on 18 Aug. 2018
Inside ten LD of Earth16 to 20 Aug. 2018
Data based onJPL SSD orbit solution #3 downloaded from JPL on 18 Sept. 2018 UTC
based on 40 observations spanning 34 days
Optical observation  
  • reported from 9 observing codes during 33.9258 days: 104, 160, 204, 474, 807, C95, J95, L01, T08
  • designation assigned to ATLAS Mauna Loa observation at 0556 UTC 14 Aug. 2018
  • last observed at 0409 UTC on 17 Sept. 2018 by Robert Holmes via Cerro Tololo Inter-American Obs.
Links  
2018 PN22   -     departed
Approximate diameter11 meters (H=27.393)
Closest Earth approach6.22 LD at 0816 UTC on 9 Aug. 2018
Inside ten LD of Earth25 July until 23 Aug. 2018
Data based onJPL SSD orbit solution #3 downloaded from JPL on 22 Sept. 2018 UTC
based on 18 observations spanning 25 days
Optical observation  
  • reported from 6 observing codes during 24.7774 days: 104, 568, F51, J95, L01, T12
  • designation assigned to Pan-STARRS 1 observation at 1359 UTC 13 Aug. 2018
  • last observed at 0838 UTC on 7 Sept. 2018 by UH/Tholen NEO Follow-Up 2.24m Telescope
NotesNHATS target
Links  
2018 PP9   -     departed
Approximate diameter21 meters (H=26.)
Closest Earth approach1.63 LD at 1451 UTC on 3 Aug. 2018
Inside Earth SOI2 to 4 Aug. 2018
Inside ten LD of Earth27 July until 10 Aug. 2018
Closest Moon approach1.86 LD at 0624 UTC on 4 Aug. 2018
Data based onJPL SSD orbit solution #5 downloaded from JPL on 19 Sept. 2018 UTC
based on 36 observations spanning 41 days
Optical observation  
  • reported from 8 observing codes during 40.8125 days: 291, 711, 807, F51, H21, J04, L01, T05
  • designation assigned to ATLAS Haleakala observation at 1323 UTC 7 Aug. 2018
  • last observed at 0853 UTC on 17 Sept. 2018 by the Spacewatch 1.8m telescope
NotesNHATS target
Links  
2018 LQ2   -     departed
Approximate diameter37 meters (H=24.8)
Closest Earth approach9.36 LD at 2135 UTC on 27 Aug. 2018
Inside ten LD of Earth17 Aug. until 6 Sept. 2018
Data based onJPL SSD orbit solution #61 downloaded from JPL on 19 Sept. 2018 UTC
based on 443 observations spanning 105 days
Optical observation  
  • reported from 36 observing codes during 105.1806 days: 157, 160, 204, 291, 587, 595, 691, 703, 711, 718, A17, B67, C97, D29, F51, F52, G34, G37, G40, G58, G96, H21, H36, I41, I52, K63, K87, L04, P93, T05, T08, U63, W25, W34, Z43, Z80
  • first observed at 1255 UTC on 5 June 2018 by Pan-STARRS 1
  • designation assigned to Catalina Sky Survey observation at 0825 UTC 7 June 2018
  • last observed at 1715 UTC on 18 Sept. 2018 by Al-Fulaij Obs.
NotesNHATS target
Links  
2017 SL16   -   outbound
Approximate diameter23 meters (H=25.8)
Closest Earth approach8.50 LD at 2108 UTC on 20 Sept. 2018
Inside ten LD of Earth17 to 24 Sept. 2018
Data based onJPL SSD orbit solution #4 downloaded from JPL on 26 Aug. 2018 UTC (dated 16 Oct. 2017 local)
based on 34 observations spanning 21 days
Optical observation  
    none recent
NotesNHATS target
previous observation Sept.-Oct. 2017
Links  
2015 SW6   -     departed
Approximate diameter41 meters (H=24.6)
Closest Earth approach9.20 LD at 0007 UTC on 11 Sept. 2018
Inside ten LD of Earth9 to 12 Sept. 2018
Data based onJPL SSD orbit solution #18 downloaded from JPL on 20 Sept. 2018 UTC
based on 160 observations spanning 2015-2018
Optical observation  
  • reported from 17 observing codes during 4.9960 days: 033, 104, 160, 585, 703, 711, 850, A17, C95, E23, G96, H21, I52, J95, K88, L01, T05
  • first observed at 0848 UTC on 13 Sept. 2018 by the Catalina Sky Survey
  • last observed at 0842 UTC on 18 Sept. 2018 by Cordell-Lorenz Obs.
Notesprevious observation Sept.-Oct. 2015
Links  
2007 VD12   -     distant
Approximate diameter339 meters (H=20.)
Closest Earth approach
Distance from Earth264.3 - 291.8 LD min-max during the observation period
Data based onJPL SSD orbit solution #39 downloaded from JPL on 15 Sept. 2018 UTC
based on 225 observations spanning 2007-2018 including radar
Optical observation  
  • reported from 2 observing codes during 8.0345 days: 291, 691
  • first observed at 1117 UTC on 6 Sept. 2018 by the Spacewatch 0.9m telescope
  • last observed at 1207 UTC on 14 Sept. 2018 by the Spacewatch 0.9m telescope
Notesprevious passage Nov. 2007 at 6.21 LD and observation July 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.