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Legend - object IDs plus links to more info

Data compiled at 1745 UTC on 26 May 2018 for 38 known objects during a period of seven days from 23 to 29 May 2018. Orange is for objects with a new JPL orbit solution (usually from new observation).

Chart
ID

Full ID
Period
Closest
Passage
Uncertainty

Status
BT18450894 2008 BT18115.4 LD  distant
DC362017 DC36154.0 LD  distant
DP1552015 DP15514.99 LDapproaching
EJ42018 EJ417.34 LD+/- one minuteapproaching
EZ22018 EZ2122.01 LD  departed intruder
FN191999 FN1921.61 LD  departed
GE22018 GE267.34 LD  departed
HO2018 HO37.71 LD  departed
JA12018 JA112.84 LD  departed
JG12018 JG17.63 LD  departed
JG32018 JG334.74 LD  departed
JK22018 JK219.93 LD  departed
JL12018 JL113.39 LD  departed
JM2018 JM64.86 LD  departed
JM22018 JM233.54 LD  departed
JN2018 JN42.32 LD  departed
JR12018 JR161.90 LD  departed
JR252014 JR2564.80 LD  departed
JR1002002 JR10042.6 LD  distant
JU22018 JU222.42 LD+/- 2 minutes  departed
JW2018 JW45.29 LD  departed
JX2018 JX19.89 LD  departed
JX12018 JX116.20 LD  departed
JY2018 JY21.54 LD  departed
KB6768347 2001 KB679.50 LDapproaching
KC2018 KC22.11 LD  departed
KD22018 KD210.79 LD  departed
KF12018 KF13.86 LDoutbound
KN22018 KN26.10 LDinbound
KO12018 KO126.44 LD  departed
KQ2018 KQ10.17 LD  departed
KS2018 KS2.50 LDoutbound
KT22018 KT22.48 LDoutbound
KU2018 KU13.71 LD  departed
KU22018 KU24.06 LDoutbound
KW12018 KW10.39 LDoutbound intruder
NP32008 NP3122.0 LD  distant
WC92010 WC920.17 LD  departed intruder
DateTfc.Time
23 May '18Rept. Line
24 May '18Rept. Line
25 May '18Rept. Line
26 May '18Rept. Line
27 May '18Rept. Line
28 May '18 Line
29 May '18 Line

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

2018 KU2   -   outbound
Approximate diameter15 meters (H=26.744)
Closest Earth approach3.13 LD at 1059 UT on 21 May 2018
Inside ten LD of Earth15 to 27 May 2018
Data based onJPL SSD orbit solution #1 downloaded from JPL on 25 May 2018 UTC
based on 23 observations spanning one day
Optical observation  
  • reported from 4 observing codes during 1.2707 days: 204, 703, E23, I52
  • designation assigned to Catalina Sky Survey observation at 0549 UT 24 May 2018
  • last observed at 1219 UT on 25 May 2018 by Arcadia Obs.
NotesNHATS target
Links  
2018 KT2   -   outbound
Approximate diameter14 meters (H=26.885)
Closest Earth approach2.48 LD at 0053 UT on 23 May 2018
Inside ten LD of Earth18 to 28 May 2018
Data based onJPL SSD orbit solution #2 downloaded from JPL on 26 May 2018 UTC
based on 26 observations spanning one day
Optical observation  
  • reported from 5 observing codes during 1.3526 days: 204, 691, 703, E23, I52
  • designation assigned to Catalina Sky Survey observation at 0510 UT 24 May 2018
  • last observed at 1338 UT on 25 May 2018 by Arcadia Obs.
NotesNHATS target
Links  
2018 KN2   -   inbound
Approximate diameter27 meters (H=25.495)
Closest Earth approach6.10 LD at 1510 UT on 29 May 2018
Inside ten LD of Earth25 May until 3 June 2018
Data based onJPL SSD orbit solution #1 downloaded from JPL on 24 May 2018 UTC
based on 32 observations spanning 2 days
Optical observation  
  • reported from 7 observing codes during 2.0848 days: 734, G40, G96, H01, H21, I52, J95
  • designation assigned to Mt. Lemmon Survey observation at 0613 UT 22 May 2018
  • last observed at 0815 UT on 24 May 2018 by ARO Westfield
Links  
2018 KD2   -     departed
Approximate diameter24 meters (H=25.72)
Closest Earth approach2.24 LD at 1106 UT on 19 May 2018
Inside Earth SOIduring 19 May 2018
Inside ten LD of Earth16 to 22 May 2018
Closest Moon approach1.57 LD at 0928 UT on 19 May 2018
Data based onJPL SSD orbit solution #1 downloaded from JPL on 23 May 2018 UTC
based on 31 observations spanning 2 days
Optical observation  
  • reported from 6 observing codes during 1.8432 days: 691, 807, E08, E23, I52, T08
  • designation assigned to ATLAS Mauna Loa observation at 0749 UT 21 May 2018
  • last observed at 0404 UT on 23 May 2018 by the Spacewatch 0.9m telescope
Links  
2018 KW1   -   outbound intruder
Approximate diameter4 meters (H=29.682)
Closest Earth approach0.39 LD at 1156 UT on 23 May 2018
Inside Earth-Moon system2201 on 22 May until 0151 UT on 24 May 2018
Inside Earth SOI21 to 25 May 2018
Inside ten LD of Earth17 to 29 May 2018
Closest Moon approach0.57 LD at 0237 UT on 23 May 2018
Inside one LD of Moon1507 on 22 May until 1357 UT on 23 May 2018
Data based onJPL SSD orbit solution #3 downloaded from JPL on 23 May 2018 UTC
based on 47 observations spanning one day
Optical observation  
  • reported from 5 observing codes during 1.0791 days: C42, G96, H01, I52, J95
  • designation assigned to Mt. Lemmon Survey observation at 0439 UT 22 May 2018
  • last observed at 0633 UT on 23 May 2018 by Steward Obs. Mt. Lemmon Station
NotesNHATS target
Links  
2018 KO1   -     departed
Approximate diameter34 meters (H=24.977)
Closest Earth approach3.90 LD at 2304 UT on 13 May 2018
Inside ten LD of Earth10 to 17 May 2018
Data based onJPL SSD orbit solution #4 downloaded from JPL on 25 May 2018 UTC
based on 38 observations spanning 6 days
Optical observation  
  • reported from 6 observing codes during 5.8754 days: 691, 807, E23, I52, T05, T08
  • designation assigned to ATLAS Haleakala observation at 0946 UT 19 May 2018
  • last observed at 0647 UT on 25 May 2018 by Steward Obs. Mt. Lemmon Station
Links  
2018 KF1   -   outbound
Approximate diameter25 meters (H=25.678)
Closest Earth approach2.24 LD at 0852 UT on 21 May 2018
Inside Earth SOI20 to 21 May 2018
Inside ten LD of Earth16 to 26 May 2018
Closest Moon approach2.85 LD at 0132 UT on 21 May 2018
Data based onJPL SSD orbit solution #9 downloaded from JPL on 26 May 2018 UTC
based on 116 observations spanning 5 days
Optical observation  
  • reported from 20 observing codes during 5.3007 days: 104, 160, 595, 703, 718, 900, 932, C95, H01, I52, J69, J95, K63, K87, L01, P93, T08, T12, W71, Z80
  • designation assigned to Catalina Sky Survey observation at 0716 UT 19 May 2018
  • last observed at 1429 UT on 24 May 2018 by UH/Tholen NEO Follow-Up 2.24m Telescope
Links  
2018 KU   -     departed
Approximate diameter18 meters (H=26.344)
Closest Earth approach7.56 LD at 1252 UT on 16 May 2018
Inside ten LD of Earth12 to 20 May 2018
Data based onJPL SSD orbit solution #5 downloaded from JPL on 24 May 2018 UTC
based on 38 observations spanning 6 days
Optical observation  
  • reported from 6 observing codes during 6.0800 days: 474, E23, F51, G96, I52, J95
  • designation assigned to Mt. Lemmon Survey observation at 0705 UT 18 May 2018
  • last observed at 0900 UT on 24 May 2018 by Steward Obs. Mt. Lemmon Station
Links  
2018 KS   -   outbound
Approximate diameter9 meters (H=27.87)
Closest Earth approach2.05 LD at 0401 UT on 22 May 2018
Inside Earth SOI21 to 22 May 2018
Inside ten LD of Earth16 to 27 May 2018
Closest Moon approach1.59 LD at 0635 UT on 22 May 2018
Data based onJPL SSD orbit solution #3 downloaded from JPL on 21 May 2018 UTC
based on 54 observations spanning 4 days
Optical observation  
  • reported from 10 observing codes during 3.8852 days: 033, 160, 691, 807, G40, G96, H01, I52, J95, L01
  • designation assigned to Mt. Lemmon Survey observation at 0808 UT 17 May 2018
  • last observed at 0523 UT on 21 May 2018 by Steward Obs. Mt. Lemmon Station
NotesNHATS target
Links  
2018 KQ   -     departed
Approximate diameter11 meters (H=27.464)
Closest Earth approach8.70 LD at 2303 UT on 19 May 2018
Inside ten LD of Earth17 to 22 May 2018
Data based onJPL SSD orbit solution #1 downloaded from JPL on 19 May 2018 UTC
based on 29 observations spanning 2 days
Optical observation  
  • reported from 4 observing codes during 2.0155 days: 033, G96, H01, I52
  • designation assigned to Mt. Lemmon Survey observation at 0801 UT 17 May 2018
  • last observed at 0824 UT on 19 May 2018 by Steward Obs. Mt. Lemmon Station
Links  
2018 KC   -     departed
Approximate diameter11 meters (H=27.473)
Closest Earth approach3.06 LD at 1344 UT on 13 May 2018
Inside ten LD of Earth9 to 17 May 2018
Data based onJPL SSD orbit solution #2 downloaded from JPL on 18 May 2018 UTC
based on 36 observations spanning 2 days
Optical observation  
  • reported from 6 observing codes during 1.9955 days: G96, H01, H36, I52, J95, L01
  • designation assigned to Mt. Lemmon Survey observation at 0610 UT 16 May 2018
  • last observed at 0603 UT on 18 May 2018 by Steward Obs. Mt. Lemmon Station
Links  
2018 JG3   -     departed
Approximate diameter22 meters (H=25.953)
Closest Earth approach2.84 LD at 1427 UT on 11 May 2018
Inside ten LD of Earth8 to 14 May 2018
Data based onJPL SSD orbit solution #4 downloaded from JPL on 21 May 2018 UTC
based on 62 observations spanning 6 days
Optical observation  
  • reported from 10 observing codes during 5.8738 days: 033, 658, 673, 703, 807, G40, H01, H36, I52, J95
  • designation assigned to Catalina Sky Survey observation at 0922 UT 14 May 2018
  • last observed at 0620 UT on 20 May 2018 by Robert Holmes via Cerro Tololo Inter-American Obs.
Links  
2018 JU2   -     departed
Approximate diameter6 meters (H=28.638)
Closest Earth approach3.59 LD at 0524 UT on 6 May 2018 - Note: JPL reports an approach uncertainty of +/- 2 minutes
Inside ten LD of Earth28 April until 13 May 2018
Data based onJPL SSD orbit solution #1 downloaded from JPL on 14 May 2018 UTC
based on 20 observations spanning 2 days
Optical observation  
  • reported from 5 observing codes during 1.9915 days: 291, G96, H21, I52, J04
  • designation assigned to Mt. Lemmon Survey observation at 0716 UT 12 May 2018
  • last observed at 0704 UT on 14 May 2018 by the Spacewatch 1.8m telescope
NotesNHATS target
Links  
2018 JM2   -     departed
Approximate diameter28 meters (H=25.447)
Closest Earth approach7.80 LD at 2318 UT on 6 May 2018
Inside ten LD of Earth3 to 10 May 2018
Data based onJPL SSD orbit solution #4 downloaded from JPL on 18 May 2018 UTC
based on 44 observations spanning 8 days
Optical observation  
  • reported from 8 observing codes during 8.0812 days: 104, 291, 711, G96, I52, J04, L01, P93
  • designation assigned to Mt. Lemmon Survey observation at 0913 UT 10 May 2018
  • last observed at 1110 UT on 18 May 2018 by the Spacewatch 1.8m telescope
Links  
2018 JK2   -     departed
Approximate diameter25 meters (H=25.66)
Closest Earth approach9.44 LD at 0636 UT on 9 May 2018
Inside ten LD of Earth6 to 11 May 2018
Data based onJPL SSD orbit solution #5 downloaded from JPL on 20 May 2018 UTC
based on 63 observations spanning 10 days
Optical observation  
  • reported from 10 observing codes during 10.1424 days: 104, 160, 291, 595, C47, G96, I52, J04, J95, L01
  • designation assigned to Mt. Lemmon Survey observation at 0702 UT 10 May 2018
  • last observed at 1027 UT on 20 May 2018 by the Spacewatch 1.8m telescope
NotesNHATS target
Links  
2018 JX1   -     departed
Approximate diameter17 meters (H=26.456)
Closest Earth approach9.33 LD at 0914 UT on 15 May 2018
Inside ten LD of Earth13 to 17 May 2018
Data based onJPL SSD orbit solution #2 downloaded from JPL on 14 May 2018 UTC
based on 30 observations spanning 6 days
Optical observation  
  • reported from 4 observing codes during 6.0655 days: G96, I52, J95, P93
  • designation assigned to Mt. Lemmon Survey observation at 0724 UT 8 May 2018
  • last observed at 0858 UT on 14 May 2018 by Steward Obs. Mt. Lemmon Station
Links  
2018 JR1   -     departed
Approximate diameter26 meters (H=25.575)
Closest Earth approach6.74 LD at 0951 UT on 3 May 2018
Inside ten LD of Earth1 to 5 May 2018
Data based onJPL SSD orbit solution #4 downloaded from JPL on 18 May 2018 UTC
based on 47 observations spanning 9 days
Optical observation  
  • reported from 8 observing codes during 8.8997 days: 033, 711, G96, H01, H21, I52, J95, V06
  • designation assigned to Mt. Lemmon Survey observation at 0935 UT 8 May 2018
  • last observed at 0711 UT on 17 May 2018 by ARO Westfield
Links  
2018 JL1   -     departed
Approximate diameter15 meters (H=26.722)
Closest Earth approach7.43 LD at 0501 UT on 14 May 2018
Inside ten LD of Earth8 to 19 May 2018
Data based onJPL SSD orbit solution #6 downloaded from JPL on 18 May 2018 UTC
based on 39 observations spanning 8 days
Optical observation  
  • reported from 8 observing codes during 7.9781 days: 033, 291, G96, I52, J04, J95, T12, V06
  • designation assigned to Mt. Lemmon Survey observation at 0619 UT 8 May 2018
  • last observed at 0548 UT on 16 May 2018 by UH/Tholen NEO Follow-Up 2.24m Telescope
Notesrisk, NHATS target
Links  
2018 JG1   -     departed
Approximate diameter43 meters (H=24.505)
Closest Earth approach5.29 LD at 0050 UT on 20 May 2018
Inside ten LD of Earth15 to 24 May 2018
Data based onJPL SSD orbit solution #9 downloaded from JPL on 19 May 2018 UTC
based on 75 observations spanning 10 days
Optical observation  
  • reported from 13 observing codes during 10.2403 days: 033, 291, 474, 673, 691, 711, G96, H01, I52, J04, J95, T08, T12
  • designation assigned to Mt. Lemmon Survey observation at 0418 UT 8 May 2018
  • last observed at 1004 UT on 18 May 2018 by Mt. John Obs.
Notesrisk
Links  
2018 JA1   -     departed
Approximate diameter24 meters (H=25.782)
Closest Earth approach4.43 LD at 1606 UT on 13 May 2018
Inside ten LD of Earth6 to 20 May 2018
Data based onJPL SSD orbit solution #8 downloaded from JPL on 16 May 2018 UTC
based on 106 observations spanning 8 days
Optical observation  
  • reported from 18 observing codes during 7.9794 days: 033, 474, 595, 703, 932, A53, E08, E23, G48, I52, J04, K88, L01, P93, Q62, R58, T08, V06
  • designation assigned to Catalina Sky Survey observation at 0736 UT 8 May 2018
  • last observed at 0706 UT on 16 May 2018 by Steward Obs. Mt. Lemmon Station
NotesNHATS target
Links  
2018 JY   -     departed
Approximate diameter50 meters (H=24.155)
Closest Earth approach8.78 LD at 1606 UT on 14 May 2018
Inside ten LD of Earth12 to 16 May 2018
Data based onJPL SSD orbit solution #7 downloaded from JPL on 23 May 2018 UTC
based on 46 observations spanning 16 days
Optical observation  
  • reported from 10 observing codes during 16.0345 days: 291, 474, E08, E23, H01, I47, I52, J95, T05, T08
  • designation assigned to ATLAS Haleakala observation at 0948 UT 7 May 2018
  • last observed at 1038 UT on 23 May 2018 by the Spacewatch 1.8m telescope
Links  
2018 JX   -     departed
Approximate diameter71 meters (H=23.401)
Closest Earth approach3.88 LD at 0711 UT on 16 May 2018
Inside ten LD of Earth13 to 19 May 2018
Data based onJPL SSD orbit solution #10 downloaded from JPL on 26 May 2018 UTC
based on 143 observations spanning 11 days
Optical observation  
  • reported from 24 observing codes during 11.0038 days: 033, 474, 595, 691, 703, 711, 850, A17, A53, C47, G96, I52, J95, K61, K87, K88, L01, P93, Q66, T08, W71, Y00, Z43, Z80
  • designation assigned to Catalina Sky Survey observation at 0941 UT 7 May 2018
  • last observed at 0947 UT on 18 May 2018 by Mt. John Obs.
Links  
2018 JW   -     departed
Approximate diameter22 meters (H=25.888)
Closest Earth approach8.98 LD at 1558 UT on 6 May 2018
Inside ten LD of Earth5 to 8 May 2018
Data based onJPL SSD orbit solution #5 downloaded from JPL on 16 May 2018 UTC
based on 49 observations spanning 9 days
Optical observation  
  • reported from 9 observing codes during 9.0888 days: 033, 198, G96, I52, J95, K87, K88, L01, V06
  • designation assigned to Mt. Lemmon Survey observation at 0623 UT 7 May 2018
  • last observed at 0831 UT on 16 May 2018 by Steward Obs. Mt. Lemmon Station
Links  
2018 JN   -     departed
Approximate diameter33 meters (H=25.082)
Closest Earth approach4.48 LD at 1947 UT on 30 April 2018
Inside ten LD of Earth26 April until 5 May 2018
Data based onJPL SSD orbit solution #15 downloaded from JPL on 25 May 2018 UTC
based on 143 observations spanning 20 days
Optical observation  
  • reported from 22 observing codes during 20.0117 days: 291, 691, 703, 711, 734, A17, C43, C47, E23, H01, I52, J04, J69, J95, K61, K74, K87, K88, L01, P93, T12, Z80
  • designation assigned to Catalina Sky Survey observation at 1009 UT 5 May 2018
  • last observed at 1026 UT on 25 May 2018 by the Spacewatch 1.8m telescope
Notesrisk
Links  
2018 JM   -     departed
Approximate diameter58 meters (H=23.825)
Closest Earth approach6.54 LD at 1447 UT on 30 April 2018
Inside ten LD of Earth27 April until 3 May 2018
Data based onJPL SSD orbit solution #12 downloaded from JPL on 24 May 2018 UTC
based on 168 observations spanning 19 days
Optical observation  
  • reported from 27 observing codes during 18.9474 days: 585, 595, 691, 703, 711, 734, A17, C23, C43, C47, E23, G34, G48, G96, I52, J43, J69, J95, K61, K74, K87, K88, L01, P93, Q62, W34, Z80
  • designation assigned to Catalina Sky Survey observation at 0855 UT 5 May 2018
  • last observed at 0739 UT on 24 May 2018 by Steward Obs. Mt. Lemmon Station
Links  
2018 HO   -     departed
Approximate diameter15 meters (H=26.7)
Closest Earth approach7.57 LD at 2221 UT on 12 April 2018
Inside ten LD of Earth6 to 19 April 2018
Data based onJPL SSD orbit solution #4 downloaded from JPL on 26 May 2018 UTC
based on 71 observations spanning 35 days
Optical observation  
  • reported from 14 observing codes during 35.1806 days: 033, 104, 204, 587, 734, C95, G96, H01, H21, I52, J95, K51, L01, T12
  • designation assigned to Mt. Lemmon Survey observation at 0821 UT 18 April 2018
  • last observed at 1241 UT on 23 May 2018 by UH/Tholen NEO Follow-Up 2.24m Telescope
NotesNHATS target
Links  
2018 GE2   -     departed
Approximate diameter13 meters (H=27.016)
Closest Earth approach1.41 LD at 0058 UT on 10 April 2018
Inside Earth SOI8 to 11 April 2018
Inside ten LD of Earth2 to 17 April 2018
Closest Moon approach1.24 LD at 2102 UT on 9 April 2018
Data based onJPL SSD orbit solution #17 downloaded from JPL on 22 May 2018 UTC
based on 104 observations spanning 36 days
Optical observation  
  • reported from 12 observing codes during 36.0269 days: 246, 291, 691, 703, 850, G40, G96, I41, I52, T08, T12, W88
  • designation assigned to Palomar Transient Factory observation at 0950 UT 10 April 2018
  • last observed at 1028 UT on 16 May 2018 by UH/Tholen NEO Follow-Up 2.24m Telescope
Notesrisk, NHATS target
Links  
2018 EJ4   -   approaching
Approximate diameter186 meters (H=21.3)
Closest Earth approach5.56 LD at 1915 UT on 10 June 2018
Inside ten LD of Earth4 to 16 June 2018
Data based onJPL SSD orbit solution #45 downloaded from JPL on 26 May 2018 UTC
based on 284 observations spanning 74 days
Optical observation  
  • reported from 24 observing codes during 73.5851 days: 033, 118, 204, 246, 291, 695, 703, 711, 734, A17, F51, G40, G96, H21, H45, I41, I52, K38, K87, T04, T05, T08, T12, U63
  • designation assigned to Mt. Lemmon Survey observation at 1111 UT 13 March 2018
  • last observed at 0113 UT on 26 May 2018 by Modra Obs.
Notesradar target, NHATS target
Links  
2018 EZ2   -     departed intruder
Approximate diameter17 meters (H=26.5)
Closest Earth approach0.56 LD at 0240 UT on 14 March 2018
Inside Earth-Moon system1713 on 13 March until 1207 UT on 14 March 2018
Inside Earth SOI12 to 15 March 2018
Inside ten LD of Earth9 to 18 March 2018
Closest Moon approach0.53 LD at 1308 UT on 14 March 2018
Inside one LD of Moon0342-2234 UT on 14 March 2018
Data based onJPL SSD orbit solution #7 downloaded from JPL on 18 May 2018 UTC
based on 89 observations spanning 66 days
Optical observation  
  • reported from 12 observing codes during 65.9507 days: 309, 349, 807, 900, B74, C95, H06, H21, K65, K88, P93, Q66
  • designation assigned to JAXA Janess-G observation at 1005 UT 12 March 2018
  • last observed at 0855 UT on 17 May 2018 by Marco Micheli via Cerro Paranal
Notesrisk
Links  
2017 DC36   -     distant
Approximate diameter129 meters (H=22.1)
Distance from Earth81.0 - 142.7 LD min-max during the observation period
Data based onJPL SSD orbit solution #34 downloaded from JPL on 18 May 2018 UTC
based on 361 observations spanning 2017-2018
Optical observation  
  • reported from 5 observing codes during 84.7171 days: 291, 474, 691, 807, I52
  • first observed at 0846 UT on 21 Feb. 2018 by Robert Holmes via Cerro Tololo Inter-American Obs.
  • last observed at 0158 UT on 17 May 2018 by Robert Holmes via Cerro Tololo Inter-American Obs.
NotesNHATS target
previous passage Feb. 2017 at 4.23 LD
Links  
2015 DP155   -   approaching
Approximate diameter162 meters (H=21.6)
Closest Earth approach8.96 LD at 0553 UT on 11 June 2018
Inside ten LD of Earth6 to 15 June 2018
Data based onJPL SSD orbit solution #86 downloaded from JPL on 26 May 2018 UTC
based on 371 observations spanning 2015-2018
Optical observation  
  • reported from 17 observing codes during 130.7608 days: 204, 246, 291, 691, 703, C51, F51, G96, H45, I41, J43, T03, T05, T08, W34, W71, Z80
  • first observed at 0855 UT on 14 Jan. 2018 by the Spacewatch 1.8m telescope
  • last observed at 0311 UT on 25 May 2018 by Rand II Obs.
NotesNHATS target
previous observation Feb.-Oct. 2015
Links  
2014 JR25   -     departed
Approximate diameter71 meters (H=23.4)
Closest Earth approach6.49 LD at 0503 UT on 4 May 2018
Inside ten LD of Earth1 to 6 May 2018
Data based onJPL SSD orbit solution #15 downloaded from JPL on 22 May 2018 UTC
based on 102 observations spanning 2014-2018
Optical observation  
  • reported from 9 observing codes during 10.9485 days: 291, 850, F51, G40, G96, I52, J04, L01, T08
  • first observed at 1359 UT on 10 May 2018 by ATLAS Mauna Loa
  • last observed at 1245 UT on 21 May 2018 by Pan-STARRS 1
Notesprevious passage May 2014 at 2.24 LD
Links  
2010 WC9   -     departed intruder
Approximate diameter68 meters (H=23.5)
Closest Earth approach0.53 LD at 2204 UT on 15 May 2018
Inside Earth-Moon system1456 on 15 May until 0512 UT on 16 May 2018
Inside Earth SOI15 to 16 May 2018
Inside ten LD of Earth12 to 19 May 2018
Closest Moon approach1.13 LD at 0405 UT on 16 May 2018
Data based onJPL SSD orbit solution #20 downloaded from JPL on 24 May 2018 UTC
based on 213 observations spanning 2010-2018
Optical observation  
  • reported from 26 observing codes during 6.9731 days: 291, 595, 703, 711, 718, 850, C77, G40, G96, H06, H47, I52, J04, J69, J95, K87, K88, L01, Q62, T05, T08, V78, W34, Z43, Z80, Z92
  • first observed at 0919 UT on 8 May 2018 by the Mt. Lemmon Survey
  • last observed at 0840 UT on 15 May 2018 by Vicksburg Obs.
Notesprevious observation Nov.-Dec. 2010
Links  
2008 NP3   -     distant
Approximate diameter74 meters (H=23.3)
Distance from Earth125.6 LD during the observation period
Data based onJPL SSD orbit solution #14 downloaded from JPL on 16 May 2018 UTC
based on 71 observations spanning 2008-2018
Optical observation  
  • reported from one observing code during 0.182 hours: 291
  • first observed at 0958 UT on 16 May 2018 by the Spacewatch 1.8m telescope
  • last observed at 1009 UT on 16 May 2018 by the Spacewatch 1.8m telescope
NotesNHATS target
previous passage July 2008 at 6.87 LD, observation July 2009, observation July 2010, and observation May-June 2017
Links  
450894 2008 BT18   -     distant
Approximate diameter741 meters (H=18.3)
Distance from Earth54.9 - 502.2 LD min-max during the observation period
Data based onJPL SSD orbit solution #91 downloaded from JPL on 24 May 2018 UTC
based on 378 observations spanning 1955-2018 including radar
Optical observation  
  • reported from 7 observing codes during 148.9656 days: 703, F51, G34, G96, I41, T05, T08
  • first observed at 1147 UT on 25 Dec. 2017 by the Mt. Lemmon Survey
  • last observed at 1058 UT on 23 May 2018 by the Catalina Sky Survey
Notesprevious passage July 2008 at 5.87 LD and observation Oct. 2015
Links  
2002 JR100   -     distant
Approximate diameter47 meters (H=24.3)
Distance from Earth13.3 - 39.7 LD min-max during the observation period
Data based onJPL SSD orbit solution #23 downloaded from JPL on 22 May 2018 UTC
based on 137 observations spanning 2002-2018
Optical observation  
  • reported from 7 observing codes during 16.9882 days: 691, 703, A17, G96, K87, P93, T05
  • first observed at 1029 UT on 4 May 2018 by the Catalina Sky Survey
  • last observed at 1012 UT on 21 May 2018 by the Spacewatch 0.9m telescope
NotesNHATS target
previous passage April 2010 at 8.02 LD
Links  
68347 2001 KB67   -   approaching
Approximate diameter371 meters (H=19.8)
Closest Earth approach9.50 LD at 0245 UT on 29 May 2018
Inside ten LD of Earth28 to 30 May 2018
Data based onJPL SSD orbit solution #38 downloaded from JPL on 28 March 2018 UTC
based on 228 observations spanning 2001-2017
Optical observation  
    none recent
Notesradar target
previous observation June-July 2017
Links  
1999 FN19   -     departed
Approximate diameter112 meters (H=22.4)
Closest Earth approach9.65 LD at 1357 UT on 7 May 2018
Inside ten LD of Earth5 to 9 May 2018
Data based onJPL SSD orbit solution #72 downloaded from JPL on 25 May 2018 UTC
based on 319 observations spanning 1999-2018 including radar
Optical observation  
  • reported from 16 observing codes during 99.3709 days: 160, 204, 246, 595, 691, 703, 932, B18, C51, D29, F51, G40, G96, T04, Z80, Z84
  • first observed at 0106 UT on 14 Feb. 2018 by Calar Alto Schmidt
  • last observed at 1000 UT on 24 May 2018 by the Spacewatch 0.9m telescope
Radar observation  
  • observed 5 times from one location during 8.625 days
  • first observed at 0100 UT on 3 May 2018 by Goldstone DSS-14 70m antenna
  • last observed at 1600 UT on 11 May 2018 by Goldstone DSS-14 70m antenna
Notesradar target, NHATS target
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.