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Legend - object IDs plus links to more info

Data compiled at 2120 UTC on 23 Sept. 2017 for 35 known objects during a period of seven days from 20 to 26 Sept. 2017. 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
CS2017 CS355.20 LD  departed
CU132014 CU13191.1 LD  distant
DT1032007 DT103399.0 LD  distant
FW32016 FW343.6 LD  distant
HQ1242014 HQ124298.2 LD  distant
NB72017 NB757.67 LD  departed
QR352017 QR3532.28 LD  departed
QS162017 QS1648.06 LD  departed
RB152017 RB155.77 LDoutbound
RB162017 RB164.76 LD+/- 2 minutesinbound
RC2017 RC52.42 LD  departed
RG22017 RG27.86 LDoutbound
RH162017 RH1656.3 LD+/- 2.6333 hours  departed
RJ22017 RJ214.55 LD  departed
RK22017 RK24.40 LDoutbound
RM162017 RM1618.20 LD  departed
RN162017 RN1616.97 LD  departed
RO162017 RO164.96 LDinbound
RP162017 RP1623.09 LD+/- 6 minutes  departed
RQ152017 RQ159.71 LDoutbound
RS22017 RS210.01 LD  departed
RU22017 RU27.14 LD  departed
RV22017 RV212.05 LD  departed
RX22017 RX27.18 LD  departed
RZ152017 RZ1529.2 LD+/- 11 minutes  departed
SM22017 SM20.81 LDoutbound intruder
SP22017 SP215.13 LD  departed
SQ22017 SQ211.84 LD+/- 6 minutes  departed intruder
SR22017 SR20.24 LDoutbound intruder
SR102017 SR1015.57 LD  departed
SS102017 SS109.94 LDapproaching
TC42012 TC422.85 LDapproaching intruder
TE492005 TE4943.4 LD+/- 10.1167 hoursapproaching
VB1989 VB8.85 LDapproaching
VP11171576 1999 VP11129.80 LDapproaching
DateTfc.Time
20 Sept. '17Rept. Line
21 Sept. '17Rept. Line
22 Sept. '17Rept. Line
23 Sept. '17Rept. Line
24 Sept. '17Rept. Line
25 Sept. '17 Line
26 Sept. '17 Line

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

2017 SS10   -   approaching
Approximate diameter31 meters (H=25.227)
Closest Earth approach9.92 LD at 0518 UT on 27 Sept. 2017
Inside ten LD of Earth26 to 27 Sept. 2017
Data based onJPL SSD orbit solution #1 downloaded from JPL on 23 Sept. 2017 UTC
based on 33 observations spanning 2 days
Optical observation  
  • reported from 9 observing codes during 1.4935 days: 104, 113, 160, 595, A17, B04, F51, I52, J95
  • designation assigned to Pan-STARRS 1 observation at 1223 UT 21 Sept. 2017
  • last observed at 0013 UT on 23 Sept. 2017 by Farra d'Isonzo Obs.
Links  
2017 SR10   -     departed
Approximate diameter19 meters (H=26.211)
Closest Earth approach3.66 LD at 0947 UT on 11 Sept. 2017
Inside ten LD of Earth6 to 16 Sept. 2017
Data based onJPL SSD orbit solution #1 downloaded from JPL on 23 Sept. 2017 UTC
based on 14 observations spanning 7 days
Optical observation  
  • reported from 2 observing codes during 7.0306 days: 703, F51
  • first observed at 1020 UT on 15 Sept. 2017 by Pan-STARRS 1
  • designation assigned to Catalina Sky Survey observation at 0928 UT 18 Sept. 2017
  • last observed at 1104 UT on 22 Sept. 2017 by Pan-STARRS 1
Links  
2017 SR2   -   outbound intruder
Approximate diameter6 meters (H=28.632)
Closest Earth approach0.24 LD at 2028 UT on 20 Sept. 2017
Inside Earth-Moon system0947 on 20 Sept. until 0709 UT on 21 Sept. 2017
Inside Earth SOI19 to 21 Sept. 2017
Inside ten LD of Earth16 to 25 Sept. 2017
Closest Moon approach1.02 LD at 0252 UT on 21 Sept. 2017
Data based onJPL SSD orbit solution #2 downloaded from JPL on 21 Sept. 2017 UTC
based on 23 observations
Optical observation  
  • reported from 3 observing codes during 9.214 hours: 474, 703, I52
  • designation assigned to Catalina Sky Survey observation at 0407 UT 20 Sept. 2017
  • last observed at 1320 UT on 20 Sept. 2017 by Mt. John Obs.
Links  
2017 SQ2   -     departed intruder
Approximate diameter24 meters (H=25.782)
Closest Earth approach0.52 LD at 1618 UT on 14 Sept. 2017 - Note: JPL reports an approach uncertainty of +/- 6 minutes
Inside Earth-Moon system0706 on 14 Sept. until 0130 UT on 15 Sept. 2017
Inside Earth SOI13 to 15 Sept. 2017
Inside ten LD of Earth10 to 19 Sept. 2017
Closest Moon approach1.35 LD at 2008 UT on 14 Sept. 2017
Data based onJPL SSD orbit solution #1 downloaded from JPL on 20 Sept. 2017 UTC
based on 21 observations spanning 2 days
Optical observation  
  • reported from 5 observing codes during 1.6566 days: 703, 926, I52, J04, K61
  • designation assigned to Catalina Sky Survey observation at 0818 UT 18 Sept. 2017
  • last observed at 0004 UT on 20 Sept. 2017 by ESA Optical Ground Station
Notesrisk
Links  
2017 SP2   -     departed
Approximate diameter26 meters (H=25.551)
Closest Earth approach5.88 LD at 0449 UT on 17 Sept. 2017
Inside ten LD of Earth15 to 18 Sept. 2017
Data based onJPL SSD orbit solution #2 downloaded from JPL on 23 Sept. 2017 UTC
based on 34 observations spanning 4 days
Optical observation  
  • reported from 7 observing codes during 3.8642 days: 703, 926, F51, I52, J95, P93, Z84
  • designation assigned to Catalina Sky Survey observation at 0757 UT 18 Sept. 2017
  • last observed at 0441 UT on 22 Sept. 2017 by Steward Obs. Mt. Lemmon Station
Links  
2017 SM2   -   outbound intruder
Approximate diameter12 meters (H=27.343)
Closest Earth approach0.81 LD at 0733 UT on 20 Sept. 2017
Inside Earth-Moon system0002-1503 UT on 20 Sept. 2017
Inside Earth SOI19 to 21 Sept. 2017
Inside ten LD of Earth15 to 25 Sept. 2017
Closest Moon approach0.83 LD at 1828 UT on 20 Sept. 2017
Inside one LD of Moon1143 on 20 Sept. until 0111 UT on 21 Sept. 2017
Data based onJPL SSD orbit solution #2 downloaded from JPL on 20 Sept. 2017 UTC
based on 67 observations spanning 3 days
Optical observation  
  • reported from 14 observing codes during 2.9696 days: 474, 703, 850, 926, E23, I52, J04, J95, K61, K88, L04, P93, T08, W34
  • designation assigned to ATLAS Mauna Loa observation at 0924 UT 17 Sept. 2017
  • last observed at 0840 UT on 20 Sept. 2017 by Mt. John Obs.
Links  
2017 RP16   -     departed
Approximate diameter12 meters (H=27.203)
Closest Earth approach2.19 LD at 0015 UT on 10 Sept. 2017 - Note: JPL reports an approach uncertainty of +/- 6 minutes
Inside Earth SOI9 to 10 Sept. 2017
Inside ten LD of Earth5 to 14 Sept. 2017
Closest Moon approach1.45 LD at 0740 UT on 10 Sept. 2017
Data based onJPL SSD orbit solution #1 downloaded from JPL on 20 Sept. 2017 UTC
based on 13 observations spanning 4 days
Optical observation  
  • reported from 5 observing codes during 3.9596 days: 568, 807, 926, F51, J04
  • designation assigned to Pan-STARRS 1 observation at 0952 UT 15 Sept. 2017
  • last observed at 0853 UT on 19 Sept. 2017 by Tenagra II Obs.
Notesrisk
Links  
2017 RO16   -   inbound
Approximate diameter9 meters (H=27.803)
Closest Earth approach4.96 LD at 2016 UT on 25 Sept. 2017
Inside ten LD of Earth21 to 30 Sept. 2017
Data based onJPL SSD orbit solution #3 downloaded from JPL on 23 Sept. 2017 UTC
based on 19 observations spanning 7 days
Optical observation  
  • reported from 5 observing codes during 6.9070 days: 568, 926, F51, I52, J04
  • designation assigned to Pan-STARRS 1 observation at 0943 UT 15 Sept. 2017
  • last observed at 0729 UT on 22 Sept. 2017 by Steward Obs. Mt. Lemmon Station
Links  
2017 RN16   -     departed
Approximate diameter5 meters (H=29.062)
Closest Earth approach1.30 LD at 2216 UT on 10 Sept. 2017
Inside Earth SOI9 to 12 Sept. 2017
Inside ten LD of Earth5 to 16 Sept. 2017
Closest Moon approach2.04 LD at 0407 UT on 11 Sept. 2017
Data based onJPL SSD orbit solution #2 downloaded from JPL on 22 Sept. 2017 UTC
based on 12 observations spanning 5 days
Optical observation  
  • reported from 2 observing codes during 4.9034 days: 568, F51
  • designation assigned to Pan-STARRS 1 observation at 0943 UT 15 Sept. 2017
  • last observed at 0724 UT on 20 Sept. 2017 by Marco Micheli via Mauna Kea
Notesrisk
Links  
2017 RM16   -     departed
Approximate diameter10 meters (H=27.685)
Closest Earth approach4.38 LD at 0731 UT on 11 Sept. 2017
Inside ten LD of Earth6 to 15 Sept. 2017
Data based onJPL SSD orbit solution #1 downloaded from JPL on 20 Sept. 2017 UTC
based on 16 observations spanning 6 days
Optical observation  
  • reported from 3 observing codes during 5.8828 days: 568, F51, I52
  • first observed at 0932 UT on 13 Sept. 2017 by Pan-STARRS 1
  • designation assigned to Pan-STARRS 1 observation at 0943 UT 15 Sept. 2017
  • last observed at 0644 UT on 19 Sept. 2017 by Steward Obs. Mt. Lemmon Station
Links  
2017 RH16   -     departed
Approximate diameter25 meters (H=25.668)
Closest Earth approach2.19 LD at 0933 UT on 31 Aug. 2017 - Note: JPL reports an approach uncertainty of +/- 2.6333 hours
Inside Earth SOIduring 31 Aug. 2017
Inside ten LD of Earth27 Aug. until 3 Sept. 2017
Closest Moon approach2.90 LD at 1747 UT on 31 Aug. 2017
Data based onJPL SSD orbit solution #1 downloaded from JPL on 20 Sept. 2017 UTC
based on 9 observations spanning 5 days
Optical observation  
  • reported from 3 observing codes during 5.0759 days: 291, 568, F51
  • designation assigned to Pan-STARRS 1 observation at 0802 UT 13 Sept. 2017
  • last observed at 0952 UT on 18 Sept. 2017 by Marco Micheli via Mauna Kea
Notesrisk
Links  
2017 RB16   -   inbound
Approximate diameter25 meters (H=25.68)
Closest Earth approach4.76 LD at 0936 UT on 26 Sept. 2017 - Note: JPL reports an approach uncertainty of +/- 2 minutes
Inside ten LD of Earth22 to 30 Sept. 2017
Data based onJPL SSD orbit solution #3 downloaded from JPL on 20 Sept. 2017 UTC
based on 16 observations spanning 4 days
Optical observation  
  • reported from 5 observing codes during 4.0793 days: 291, 474, 568, 807, F51
  • designation assigned to Pan-STARRS 1 observation at 1215 UT 15 Sept. 2017
  • last observed at 1409 UT on 19 Sept. 2017 by Mt. John Obs.
Links  
2017 RZ15   -     departed
Approximate diameter13 meters (H=27.15)
Closest Earth approach5.87 LD at 1011 UT on 3 Sept. 2017 - Note: JPL reports an approach uncertainty of +/- 11 minutes
Inside ten LD of Earth29 Aug. until 8 Sept. 2017
Data based onJPL SSD orbit solution #1 downloaded from JPL on 18 Sept. 2017 UTC
based on 9 observations spanning 3 days
Optical observation  
  • reported from 3 observing codes during 2.8111 days: 568, 807, F51
  • designation assigned to Pan-STARRS 1 observation at 0956 UT 15 Sept. 2017
  • last observed at 0524 UT on 18 Sept. 2017 by Robert Holmes via Cerro Tololo Inter-American Obs.
Notesrisk
Links  
2017 RQ15   -   outbound
Approximate diameter22 meters (H=25.917)
Closest Earth approach9.71 LD at 1833 UT on 22 Sept. 2017
Inside ten LD of Earth22 to 23 Sept. 2017
Data based onJPL SSD orbit solution #4 downloaded from JPL on 22 Sept. 2017 UTC
based on 23 observations spanning 8 days
Optical observation  
  • reported from 4 observing codes during 7.6914 days: 568, 926, F51, I52
  • first observed at 0954 UT on 14 Sept. 2017 by Pan-STARRS 1
  • designation assigned to Pan-STARRS 1 observation at 1029 UT 14 Sept. 2017
  • last observed at 0230 UT on 22 Sept. 2017 by Tenagra II Obs.
Links  
2017 RB15   -   outbound
Approximate diameter10 meters (H=27.703)
Closest Earth approach5.77 LD at 2234 UT on 22 Sept. 2017
Inside ten LD of Earth15 to 30 Sept. 2017
Data based onJPL SSD orbit solution #3 downloaded from JPL on 22 Sept. 2017 UTC
based on 19 observations spanning 10 days
Optical observation  
  • reported from 4 observing codes during 10.0225 days: 568, F51, I52, J95
  • designation assigned to Pan-STARRS 1 observation at 0727 UT 12 Sept. 2017
  • last observed at 0759 UT on 22 Sept. 2017 by Steward Obs. Mt. Lemmon Station
Links  
2017 RX2   -     departed
Approximate diameter17 meters (H=26.453)
Closest Earth approach6.18 LD at 1659 UT on 18 Sept. 2017
Inside ten LD of Earth15 to 21 Sept. 2017
Data based onJPL SSD orbit solution #3 downloaded from JPL on 20 Sept. 2017 UTC
based on 40 observations spanning 4 days
Optical observation  
  • reported from 9 observing codes during 3.9175 days: 474, 585, 926, F51, H21, I52, J04, K88, W25
  • designation assigned to Pan-STARRS 1 observation at 1048 UT 15 Sept. 2017
  • last observed at 0849 UT on 19 Sept. 2017 by Mt. John Obs.
Links  
2017 RV2   -     departed
Approximate diameter20 meters (H=26.177)
Closest Earth approach2.16 LD at 0223 UT on 12 Sept. 2017
Inside Earth SOI11 to 12 Sept. 2017
Inside ten LD of Earth5 to 18 Sept. 2017
Closest Moon approach2.76 LD at 0945 UT on 12 Sept. 2017
Data based onJPL SSD orbit solution #5 downloaded from JPL on 22 Sept. 2017 UTC
based on 120 observations spanning 8 days
Optical observation  
  • reported from 21 observing codes during 7.9406 days: 204, 585, 691, 703, 850, A17, B49, E23, G34, H21, H45, I52, J69, J95, K88, L04, Q62, T05, W25, W34, Y00
  • designation assigned to ATLAS Haleakala observation at 1026 UT 14 Sept. 2017
  • last observed at 0900 UT on 22 Sept. 2017 by Petit Jean Mtn. South Obs.
Notesrisk
Links  
2017 RU2   -     departed
Approximate diameter24 meters (H=25.761)
Closest Earth approach6.79 LD at 2123 UT on 18 Sept. 2017
Inside ten LD of Earth15 to 22 Sept. 2017
Data based onJPL SSD orbit solution #3 downloaded from JPL on 21 Sept. 2017 UTC
based on 51 observations spanning 34 days
Optical observation  
  • reported from 11 observing codes during 34.0980 days: 204, 585, 926, B49, E23, F51, H21, J04, J95, T05, W25
  • first observed at 0902 UT on 17 Aug. 2017 by Pan-STARRS 1
  • designation assigned to ATLAS Haleakala observation at 1004 UT 14 Sept. 2017
  • last observed at 1123 UT on 20 Sept. 2017 by Tenagra II Obs.
Notesrisk
Links  
2017 RS2   -     departed
Approximate diameter18 meters (H=26.362)
Closest Earth approach6.44 LD at 0039 UT on 12 Sept. 2017
Inside ten LD of Earth3 to 19 Sept. 2017
Data based onJPL SSD orbit solution #4 downloaded from JPL on 23 Sept. 2017 UTC
based on 52 observations spanning 8 days
Optical observation  
  • reported from 12 observing codes during 7.9213 days: 807, 850, E23, H21, I52, J95, K88, L04, Q62, T05, T08, W34
  • designation assigned to ATLAS Haleakala observation at 0828 UT 14 Sept. 2017
  • last observed at 0635 UT on 22 Sept. 2017 by Robert Holmes via Cerro Tololo Inter-American Obs.
Links  
2017 RK2   -   outbound
Approximate diameter9 meters (H=28.001)
Closest Earth approach2.45 LD at 2115 UT on 17 Sept. 2017
Inside ten LD of Earth12 to 23 Sept. 2017
Data based onJPL SSD orbit solution #3 downloaded from JPL on 21 Sept. 2017 UTC
based on 29 observations spanning 6 days
Optical observation  
  • reported from 8 observing codes during 6.1708 days: 568, 926, C95, F51, I52, J95, W25, Z80
  • designation assigned to Pan-STARRS 1 observation at 0736 UT 13 Sept. 2017
  • last observed at 1142 UT on 19 Sept. 2017 by Tenagra II Obs.
Notesrisk
Links  
2017 RJ2   -     departed
Approximate diameter11 meters (H=27.478)
Closest Earth approach1.43 LD at 2228 UT on 15 Sept. 2017
Inside Earth SOI15 to 16 Sept. 2017
Inside ten LD of Earth13 to 18 Sept. 2017
Closest Moon approach2.01 LD at 0404 UT on 16 Sept. 2017
Data based onJPL SSD orbit solution #1 downloaded from JPL on 17 Sept. 2017 UTC
based on 26 observations spanning 3 days
Optical observation  
  • reported from 7 observing codes during 2.7566 days: 203, 204, 568, B04, F51, H21, J95
  • designation assigned to Pan-STARRS 1 observation at 0734 UT 12 Sept. 2017
  • last observed at 0144 UT on 15 Sept. 2017 by ARO Westfield
Notesrisk
Links  
2017 RG2   -   outbound
Approximate diameter45 meters (H=24.404)
Closest Earth approach7.85 LD at 1835 UT on 19 Sept. 2017
Inside ten LD of Earth16 to 23 Sept. 2017
Data based onJPL SSD orbit solution #4 downloaded from JPL on 21 Sept. 2017 UTC
based on 33 observations spanning 12 days
Optical observation  
  • reported from 10 observing codes during 12.0885 days: 926, E23, F51, H06, I52, J04, T05, T08, W88, Y00
  • designation assigned to Pan-STARRS 1 observation at 0915 UT 8 Sept. 2017
  • last observed at 1123 UT on 20 Sept. 2017 by Steward Obs. Mt. Lemmon Station
Links  
2017 RC   -     departed
Approximate diameter9 meters (H=27.896)
Closest Earth approach2.42 LD at 1716 UT on 28 Aug. 2017
Inside ten LD of Earth24 Aug. until 2 Sept. 2017
Data based onJPL SSD orbit solution #5 downloaded from JPL on 18 Sept. 2017 UTC
based on 36 observations spanning 14 days
Optical observation  
Notesrisk
Links  
2017 QR35   -     departed
Approximate diameter30 meters (H=25.274)
Closest Earth approach6.42 LD at 1314 UT on 30 Aug. 2017
Inside ten LD of Earth25 Aug. until 4 Sept. 2017
Data based onJPL SSD orbit solution #4 downloaded from JPL on 13 Sept. 2017 UTC
based on 57 observations spanning 13 days
Optical observation  
  • reported from 13 observing codes during 12.8719 days: 104, 160, 595, 900, E23, F51, I52, J95, K88, Q62, T05, T08, Y00
  • designation assigned to ATLAS Mauna Loa observation at 1048 UT 31 Aug. 2017
  • last observed at 0743 UT on 13 Sept. 2017 by Steward Obs. Mt. Lemmon Station
Links  
2017 QS16   -     departed
Approximate diameter31 meters (H=25.207)
Closest Earth approach3.52 LD at 0948 UT on 22 Aug. 2017
Inside ten LD of Earth17 to 27 Aug. 2017
Data based onJPL SSD orbit solution #4 downloaded from JPL on 21 Sept. 2017 UTC
based on 90 observations spanning 31 days
Optical observation  
  • reported from 15 observing codes during 31.1690 days: 033, 104, 107, 198, 246, 587, 595, 658, C47, C95, J95, K88, L04, T08, T14
  • designation assigned to ATLAS Mauna Loa observation at 1013 UT 20 Aug. 2017
  • last observed at 1416 UT on 20 Sept. 2017 by UH/Tholen NEO Follow-Up CFH Telescope
Notesrisk
Links  
2017 NB7   -     departed
Approximate diameter74 meters (H=23.314)
Closest Earth approach6.87 LD at 1040 UT on 6 Aug. 2017
Inside ten LD of Earth1 to 11 Aug. 2017
Data based onJPL SSD orbit solution #4 downloaded from JPL on 18 Sept. 2017 UTC
based on 28 observations spanning 78 days
Optical observation  
  • reported from 6 observing codes during 78.3191 days: 104, 691, F51, G96, I52, T05
  • designation assigned to Mt. Lemmon Survey observation at 0558 UT 1 July 2017
  • last observed at 1337 UT on 17 Sept. 2017 by Pan-STARRS 1
Links  
2017 CS   -     departed
Approximate diameter446 meters (H=19.4)
Closest Earth approach7.93 LD at 1543 UT on 29 May 2017
Inside ten LD of Earth26 May until 1 June 2017
Data based onJPL SSD orbit solution #132 downloaded from JPL on 23 Sept. 2017 UTC
based on 1196 observations spanning 245 days including radar
Optical observation  
  • reported from 62 observing codes during 244.5276 days: 073, 089, 104, 107, 108, 118, 151, 160, 204, 238, 291, 619, 691, 695, 703, 807, 926, A48, A53, B66, B67, C47, C77, C97, D29, F51, G34, G40, G45, G48, G96, H21, H45, J69, K14, K17, K38, K40, K65, K73, K74, K91, L04, P93, Q62, T05, T08, U69, V83, W08, W25, W33, W34, W85, W88, Y00, Z21, Z43, Z45, Z73, Z80, Z92
  • first observed at 1339 UT on 20 Jan. 2017 by Pan-STARRS 1
  • designation assigned to Pan-STARRS 1 observation at 1205 UT 2 Feb. 2017
  • last observed at 0219 UT on 22 Sept. 2017 by ARO Westfield
Radar observation  
  • observed 12 times from one location during 9.3056 days
  • first observed at 2200 UT on 22 May 2017 by Goldstone DSS-14 70m antenna
  • last observed at 0520 UT on 1 June 2017 by Goldstone DSS-14 70m antenna
Notesradar target
Links  
2016 FW3   -     distant
Approximate diameter27 meters (H=25.5)
Distance from Earth43.6 - 44.0 LD min-max during the observation period
Data based onJPL SSD orbit solution #10 downloaded from JPL on 23 Sept. 2017 UTC
based on 84 observations spanning 2016-2017
Optical observation  
  • reported from one observing code during 2.0349 days: T14
  • first observed at 1359 UT on 20 Sept. 2017 by UH/Tholen NEO Follow-Up CFH Telescope
  • last observed at 1449 UT on 22 Sept. 2017 by UH/Tholen NEO Follow-Up CFH Telescope
Notesrisk, NHATS target
previous passage March 2016 at 8.40 LD
Links  
2014 HQ124   -     distant
Approximate diameter562 meters (H=18.9)
Distance from Earth302.0 LD during the observation period
Data based onJPL SSD orbit solution #46 downloaded from JPL on 18 Sept. 2017 UTC
based on 294 observations spanning 2014-2017 including radar
Optical observation  
  • reported from one observing code during 0.180 hours: 691
  • first observed at 0242 UT on 18 Sept. 2017 by the Spacewatch 0.9m telescope
  • last observed at 0253 UT on 18 Sept. 2017 by the Spacewatch 0.9m telescope
Notesprevious passage June 2014 at 3.25 LD and observation March 2017
Links  
2014 CU13   -     distant
Approximate diameter141 meters (H=21.9)
Distance from Earth82.3 - 202.1 LD min-max during the observation period
Data based onJPL SSD orbit solution #42 downloaded from JPL on 23 Sept. 2017 UTC
based on 458 observations spanning 2014-2017 including radar
Optical observation  
  • reported from 2 observing codes during 36.9641 days: 291, F51
  • first observed at 1038 UT on 16 Aug. 2017 by the Spacewatch 1.8m telescope
  • last observed at 0947 UT on 22 Sept. 2017 by Pan-STARRS 1
Notesprevious passage March 2014 at 8.03 LD
Links  
2012 TC4   -   approaching intruder
Approximate diameter15 meters (H=26.7)
Closest Earth approach0.13 LD at 0541 UT on 12 Oct. 2017
Inside Earth-Moon system1408 on 11 Oct. until 2114 UT on 12 Oct. 2017
Inside Earth SOI10 to 13 Oct. 2017
Inside ten LD of Earth5 to 18 Oct. 2017
Closest Moon approach0.72 LD at 1918 UT on 12 Oct. 2017
Inside one LD of Moon0712 on 12 Oct. until 0728 UT on 13 Oct. 2017
Data based onJPL SSD orbit solution #40 downloaded from JPL on 22 Sept. 2017 UTC
based on 272 observations spanning 2012-2017
Optical observation  
  • reported from 8 observing codes during 54.9321 days: 309, 695, F51, H01, H21, J04, T09, W85
  • first observed at 0554 UT on 27 July 2017 by Marco Micheli via Cerro Paranal
  • last observed at 0417 UT on 20 Sept. 2017 by ARO Westfield
Notesrisk, radar target, NHATS target
previous passage Oct. 2012 at 0.25 LD
Links  
2007 DT103   -     distant
Approximate diameter407 meters (H=19.6)
Distance from Earth403.2 LD during the observation period
Data based onJPL SSD orbit solution #76 downloaded from JPL on 19 Sept. 2017 UTC
based on 783 observations spanning 2007-2017 including radar
Optical observation  
  • reported from one observing code during 0.410 hours: H21
  • first observed at 0840 UT on 17 Sept. 2017 by ARO Westfield
  • last observed at 0905 UT on 17 Sept. 2017 by ARO Westfield
Notesprevious passage July 2007 at 9.26 LD, observation Feb. 2010, and observation Jan.-March 2017
Links  
2005 TE49   -   approaching
Approximate diameter15 meters (H=26.7)
Closest Earth approach8.47 LD at 1825 UT on 13 Oct. 2017 - Note: JPL reports an approach uncertainty of +/- 10.1167 hours
Inside ten LD of Earth11 to 15 Oct. 2017
Data based onJPL SSD orbit solution #7 downloaded from JPL on 6 Aug. 2017 UTC (dated 6 April 2017 local)
based on 7 observations spanning 3 days
Optical observation  
    none recent
NotesNHATS target
Links  
171576 1999 VP11   -   approaching
Approximate diameter645 meters (H=18.6)
Closest Earth approach5.77 LD at 1101 UT on 22 Oct. 2017
Inside ten LD of Earth20 to 24 Oct. 2017
Data based onJPL SSD orbit solution #56 downloaded from JPL on 6 Aug. 2017 UTC (dated 6 April 2017 local)
based on 242 observations spanning 1999-2017
Optical observation  
    none recent
Notesprevious observation Sept.-Dec. 2007, observation Oct.-Dec. 2008, observation Dec. 2013, observation Nov.-March 2015, observation Dec.-Jan. 2016, and observation Nov.-Jan. 2017
Links  
1989 VB   -   approaching
Approximate diameter389 meters (H=19.7)
Closest Earth approach7.87 LD at 2001 UT on 29 Sept. 2017
Inside ten LD of Earth25 Sept. until 4 Oct. 2017
Data based onJPL SSD orbit solution #29 downloaded from JPL on 23 Sept. 2017 UTC
based on 113 observations spanning 1989-2017
Optical observation  
  • reported from 7 observing codes during 69.4613 days: C51, I39, Q62, Q68, T05, W88, Y00
  • first observed at 0043 UT on 14 July 2017 by SONEAR
  • last observed at 1147 UT on 21 Sept. 2017 by Sergio Foglia via iTelescope Obs. Siding Spring
Notesradar target
previous observation Oct.-Jan. 2013 and observation April 2014
Links  

Footnotes

Illustration of ten lunar distances.

1. Ten lunar distances:  A "lunar distance" (LD) is the average distance between Earth and Moon (about 384,400 km., the same as 238,855 miles or nearly ten [9.59] times around Earth's equator). Ten lunar distances has no special astronomical importance but is a useful arbitrary "bubble" within which to organize this reporting. An approach by a small Solar-System body starts to become interesting at less than four LD out from Earth as it encounters our planet's "Hill sphere" (distance indicated by the blue line in this illustration at about 3.9 LD). This is a region within which Earth's gravitational influence can change the orbits of passing objects. The Moon also has a Hill sphere, outlined here as a gray circle. (Earth and Moon are not shown to scale.) 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 very 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.