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Legend - object IDs plus links to more info

Data compiled at 1843 UTC on 23 June 2018 for 31 known objects during a period of seven days from 20 to 26 June 2018. 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
AS2207398 2006 AS2124.0 LD  distant
BT18450894 2008 BT18174.9 LD  distant
DP1552015 DP15512.59 LD  departed
EJ42018 EJ413.88 LD  departed
FN191999 FN1952.47 LD  departed
JG12018 JG155.33 LD  departed
KB6768347 2001 KB6766.81 LD  departed
KC42018 KC472.4 LD+/- 9 minutes  departed
KU2018 KU66.09 LD  departed
LB2016 LB92.9 LD  distant
LD12018 LD113.20 LD  departed
LE12018 LE130.50 LD  departed
LG42018 LG421.58 LD+/- one minute  departed
LK2018 LK13.86 LD  departed
LM2018 LM24.59 LD  departed
LM152018 LM1544.25 LD  departed
LR22018 LR222.37 LD  departed
LR32018 LR36.47 LDinbound
LS52018 LS56.50 LDoutbound
LT52018 LT558.27 LD+/- 3 minutes  departed
LU22018 LU229.87 LD  departed
LV32018 LV312.17 LD  departed intruder
LW32018 LW318.12 LD  departed
LX52018 LX55.22 LDoutbound
MB72018 MB719.5 LD+/- 40 minutesapproaching
MC72018 MC72.88 LD+/- one minuteoutbound
MJ2018 MJ14.62 LD  departed
MK2018 MK7.49 LD  departed
MX42018 MX45.70 LDinbound
MZ42018 MZ46.96 LD  departed intruder
UV136478784 2012 UV13647.5 LD  distant
DateTfc.Time
20 June '18Rept. Line
21 June '18Rept. Line
22 June '18Rept. Line
23 June '18Rept. Line
24 June '18Rept. Line
25 June '18 Line
26 June '18 Line

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

2018 MC7   -   outbound
Approximate diameter24 meters (H=25.765)
Closest Earth approach2.19 LD at 0943 UTC on 18 June 2018
Inside Earth SOI17 to 19 June 2018
Inside ten LD of Earth9 to 26 June 2018
Closest Moon approach2.80 LD at 1956 UTC on 17 June 2018
Data based onJPL SSD orbit solution #1 downloaded from JPL on 23 June 2018 UTC
based on 14 observations spanning 2 days
Optical observation  
  • reported from 4 observing codes during 1.6609 days: 703, G96, I52, J95
  • designation assigned to Catalina Sky Survey observation at 0927 UTC 21 June 2018
  • last observed at 0119 UTC on 23 June 2018 by Great Shefford Obs.
Notesrisk
Links  
2018 MB7   -   approaching
Approximate diameter60 meters (H=23.751)
Closest Earth approach2.78 LD at 0835 UTC on 4 July 2018 - Note: JPL reports an approach uncertainty of +/- 40 minutes
Inside ten LD of Earth30 June until 8 July 2018
Data based onJPL SSD orbit solution #1 downloaded from JPL on 23 June 2018 UTC
based on 35 observations spanning 2 days
Optical observation  
  • reported from 8 observing codes during 1.9032 days: 595, G96, H01, I52, J77, J95, L01, P93
  • designation assigned to Mt. Lemmon Survey observation at 0804 UTC 21 June 2018
  • last observed at 0544 UTC on 23 June 2018 by Steward Obs. Mt. Lemmon Station
Links  
2018 MZ4   -     departed intruder
Approximate diameter6 meters (H=28.813)
Closest Earth approach0.54 LD at 1853 UTC on 16 June 2018
Inside Earth-Moon system0935 on 16 June until 0411 UTC on 17 June 2018
Inside Earth SOI15 to 17 June 2018
Inside ten LD of Earth12 to 21 June 2018
Closest Moon approach0.20 LD at 1106 UTC on 16 June 2018
Inside one LD of Moon2348 on 15 June until 2224 UTC on 16 June 2018
Data based onJPL SSD orbit solution #1 downloaded from JPL on 20 June 2018 UTC
based on 9 observations spanning 2 days
Optical observation  
  • reported from 2 observing codes during 1.7695 days: 204, I41
  • first observed at 0623 UTC on 17 June 2018 by the Palomar Transient Factory
  • designation assigned to Palomar Transient Factory observation at 0736 UTC 17 June 2018
  • last observed at 0051 UTC on 19 June 2018 by Schiaparelli Obs.
NotesNHATS target
Links  
2018 MX4   -   inbound
Approximate diameter14 meters (H=26.893)
Closest Earth approach5.51 LD at 1821 UTC on 27 June 2018
Inside ten LD of Earth23 June until 2 July 2018
Data based onJPL SSD orbit solution #3 downloaded from JPL on 23 June 2018 UTC
based on 25 observations spanning 6 days
Optical observation  
  • reported from 5 observing codes during 5.8928 days: 291, 807, F51, I52, T12
  • designation assigned to Pan-STARRS 1 observation at 0731 UTC 17 June 2018
  • last observed at 0456 UTC on 23 June 2018 by Steward Obs. Mt. Lemmon Station
Notesrisk
Links  
2018 MK   -     departed
Approximate diameter51 meters (H=24.096)
Closest Earth approach7.49 LD at 1102 UTC on 20 June 2018
Inside ten LD of Earth18 to 22 June 2018
Data based onJPL SSD orbit solution #2 downloaded from JPL on 19 June 2018 UTC
based on 22 observations spanning 10 days
Optical observation  
  • reported from 6 observing codes during 9.6076 days: 104, 595, F51, L01, T05, W34
  • first observed at 1234 UTC on 8 June 2018 by Pan-STARRS 1
  • designation assigned to ATLAS Haleakala observation at 1152 UTC 17 June 2018
  • last observed at 0309 UTC on 18 June 2018 by Squirrel Valley Obs.
Links  
2018 MJ   -     departed
Approximate diameter23 meters (H=25.835)
Closest Earth approach4.16 LD at 0752 UTC on 13 June 2018
Inside ten LD of Earth9 to 17 June 2018
Data based onJPL SSD orbit solution #5 downloaded from JPL on 22 June 2018 UTC
based on 20 observations spanning 5 days
Optical observation  
  • reported from 3 observing codes during 4.7811 days: 104, F51, I52
  • designation assigned to Pan-STARRS 1 observation at 1005 UTC 17 June 2018
  • last observed at 0449 UTC on 22 June 2018 by Steward Obs. Mt. Lemmon Station
NotesNHATS target
Links  
2018 LM15   -     departed
Approximate diameter28 meters (H=25.448)
Closest Earth approach5.69 LD at 2228 UTC on 9 June 2018
Inside ten LD of Earth8 to 11 June 2018
Data based onJPL SSD orbit solution #1 downloaded from JPL on 19 June 2018 UTC
based on 28 observations spanning 3 days
Optical observation  
  • reported from 2 observing codes during 3.6864 days: F51, I41
  • first observed at 1332 UTC on 8 June 2018 by Pan-STARRS 1
  • designation assigned to Palomar Transient Factory observation at 0643 UTC 9 June 2018
  • last observed at 0601 UTC on 12 June 2018 by the Palomar Transient Factory
Links  
2018 LX5   -   outbound
Approximate diameter30 meters (H=25.246)
Closest Earth approach5.22 LD at 1801 UTC on 21 June 2018
Inside ten LD of Earth18 to 24 June 2018
Data based onJPL SSD orbit solution #4 downloaded from JPL on 21 June 2018 UTC
based on 60 observations spanning 7 days
Optical observation  
  • reported from 12 observing codes during 6.6725 days: 104, 160, 246, 595, 691, F51, F52, I15, I52, J95, L01, P93
  • designation assigned to Pan-STARRS 1 observation at 1149 UTC 14 June 2018
  • last observed at 0357 UTC on 21 June 2018 by Steward Obs. Mt. Lemmon Station
Links  
2018 LT5   -     departed
Approximate diameter34 meters (H=24.984)
Closest Earth approach9.28 LD at 1556 UTC on 6 June 2018 - Note: JPL reports an approach uncertainty of +/- 3 minutes
Inside ten LD of Earth5 to 7 June 2018
Data based onJPL SSD orbit solution #2 downloaded from JPL on 19 June 2018 UTC
based on 12 observations spanning 5 days
Optical observation  
  • reported from 3 observing codes during 4.6471 days: 568, 807, F51
  • designation assigned to Pan-STARRS 1 observation at 0929 UTC 14 June 2018
  • last observed at 0101 UTC on 19 June 2018 by Robert Holmes via Cerro Tololo Inter-American Obs.
Notesrisk
Links  
2018 LS5   -   outbound
Approximate diameter16 meters (H=26.639)
Closest Earth approach6.50 LD at 2048 UTC on 21 June 2018
Inside ten LD of Earth18 to 25 June 2018
Data based onJPL SSD orbit solution #4 downloaded from JPL on 23 June 2018 UTC
based on 23 observations spanning 9 days
Optical observation  
  • reported from 7 observing codes during 8.7282 days: 568, 691, 807, F51, I52, J04, J95
  • designation assigned to Pan-STARRS 1 observation at 0831 UTC 14 June 2018
  • last observed at 0159 UTC on 23 June 2018 by Great Shefford Obs.
Notesrisk
Links  
2018 LG4   -     departed
Approximate diameter12 meters (H=27.209)
Closest Earth approach4.62 LD at 2102 UTC on 8 June 2018
Inside ten LD of Earth4 to 13 June 2018
Data based onJPL SSD orbit solution #1 downloaded from JPL on 13 June 2018 UTC
based on 21 observations spanning one day
Optical observation  
  • reported from 4 observing codes during 23.508 hours: G96, I52, J04, J95
  • designation assigned to Mt. Lemmon Survey observation at 0727 UTC 12 June 2018
  • last observed at 0658 UTC on 13 June 2018 by Steward Obs. Mt. Lemmon Station
NotesNHATS target
Links  
2018 LW3   -     departed
Approximate diameter21 meters (H=26.002)
Closest Earth approach3.64 LD at 1517 UTC on 11 June 2018
Inside ten LD of Earth7 to 16 June 2018
Data based onJPL SSD orbit solution #3 downloaded from JPL on 22 June 2018 UTC
based on 26 observations spanning 10 days
Optical observation  
  • reported from 4 observing codes during 9.7179 days: 807, T05, T08, Y00
  • first observed at 1039 UTC on 11 June 2018 by ATLAS Mauna Loa
  • designation assigned to ATLAS Haleakala observation at 1019 UTC 12 June 2018
  • last observed at 0353 UTC on 21 June 2018 by Robert Holmes via Cerro Tololo Inter-American Obs.
Links  
2018 LV3   -     departed intruder
Approximate diameter17 meters (H=26.443)
Closest Earth approach0.86 LD at 0230 UTC on 15 June 2018
Inside Earth-Moon system2133 on 14 June until 0727 UTC on 15 June 2018
Inside Earth SOI14 to 16 June 2018
Inside ten LD of Earth11 to 19 June 2018
Closest Moon approach1.51 LD at 0647 UTC on 15 June 2018
Data based onJPL SSD orbit solution #3 downloaded from JPL on 14 June 2018 UTC
based on 29 observations spanning 3 days
Optical observation  
  • reported from 6 observing codes during 2.7990 days: E08, F52, G58, I52, J04, J95
  • designation assigned to Pan-STARRS 2 observation at 0910 UTC 11 June 2018
  • last observed at 0421 UTC on 14 June 2018 by Steward Obs. Mt. Lemmon Station
Notesrisk
Links  
2018 LR3   -   inbound
Approximate diameter19 meters (H=26.264)
Closest Earth approach6.02 LD at 1817 UTC on 29 June 2018
Inside ten LD of Earth20 June until 8 July 2018
Data based onJPL SSD orbit solution #9 downloaded from JPL on 23 June 2018 UTC
based on 49 observations spanning 13 days
Optical observation  
  • reported from 8 observing codes during 12.8403 days: 291, 568, 691, 807, F51, I52, J04, T12
  • first observed at 0748 UTC on 10 June 2018 by Pan-STARRS 1
  • designation assigned to Pan-STARRS 1 observation at 0804 UTC 10 June 2018
  • last observed at 0358 UTC on 23 June 2018 by Steward Obs. Mt. Lemmon Station
Notesrisk, NHATS target
Links  
2018 LU2   -     departed
Approximate diameter15 meters (H=26.706)
Closest Earth approach1.54 LD at 1139 UTC on 6 June 2018
Inside Earth SOI5 to 7 June 2018
Inside ten LD of Earth1 to 11 June 2018
Closest Moon approach2.08 LD at 1325 UTC on 6 June 2018
Data based onJPL SSD orbit solution #5 downloaded from JPL on 13 June 2018 UTC
based on 40 observations spanning 6 days
Optical observation  
  • reported from 7 observing codes during 6.0646 days: 587, 691, I41, I52, J95, L01, W34
  • designation assigned to Palomar Transient Factory observation at 0723 UTC 7 June 2018
  • last observed at 0856 UTC on 13 June 2018 by the Spacewatch 0.9m telescope
NotesNHATS target
Links  
2018 LR2   -     departed
Approximate diameter21 meters (H=26.07)
Closest Earth approach3.93 LD at 2344 UTC on 9 June 2018
Inside ten LD of Earth5 to 14 June 2018
Data based onJPL SSD orbit solution #6 downloaded from JPL on 18 June 2018 UTC
based on 53 observations spanning 7 days
Optical observation  
  • reported from 9 observing codes during 7.2452 days: 587, 703, 900, H21, H36, I52, J95, L01, T12
  • designation assigned to Catalina Sky Survey observation at 0854 UTC 8 June 2018
  • last observed at 1447 UTC on 15 June 2018 by UH/Tholen NEO Follow-Up 2.24m Telescope
Links  
2018 LE1   -     departed
Approximate diameter10 meters (H=27.702)
Closest Earth approach1.59 LD at 1253 UTC on 28 May 2018
Inside Earth SOI27 to 29 May 2018
Inside ten LD of Earth21 May until 5 June 2018
Closest Moon approach1.59 LD at 1236 UTC on 29 May 2018
Data based onJPL SSD orbit solution #10 downloaded from JPL on 22 June 2018 UTC
based on 51 observations spanning 16 days
Optical observation  
  • reported from 8 observing codes during 15.9912 days: 291, 568, 691, 807, F51, I52, T12, V06
  • designation assigned to Pan-STARRS 1 observation at 0927 UTC 5 June 2018
  • last observed at 0915 UTC on 21 June 2018 by UH/Tholen NEO Follow-Up 2.24m Telescope
Notesrisk, NHATS target
Links  
2018 LD1   -     departed
Approximate diameter18 meters (H=26.382)
Closest Earth approach1.56 LD at 1558 UTC on 14 June 2018
Inside Earth SOI13 to 15 June 2018
Inside ten LD of Earth10 to 18 June 2018
Closest Moon approach1.99 LD at 2135 UTC on 14 June 2018
Data based onJPL SSD orbit solution #8 downloaded from JPL on 14 June 2018 UTC
based on 46 observations spanning 8 days
Optical observation  
  • reported from 8 observing codes during 8.0470 days: 568, 691, 807, F51, I52, J04, T05, T12
  • designation assigned to Pan-STARRS 1 observation at 0810 UTC 5 June 2018
  • last observed at 0918 UTC on 13 June 2018 by UH/Tholen NEO Follow-Up 2.24m Telescope
Notesrisk
Links  
2018 LM   -     departed
Approximate diameter31 meters (H=25.209)
Closest Earth approach5.07 LD at 2229 UTC on 29 May 2018
Inside ten LD of Earth22 May until 6 June 2018
Data based onJPL SSD orbit solution #11 downloaded from JPL on 19 June 2018 UTC
based on 88 observations spanning 15 days
Optical observation  
  • reported from 13 observing codes during 14.7677 days: 246, 291, 474, 691, 703, 807, E08, H21, H36, I52, J04, L01, T12
  • designation assigned to Catalina Sky Survey observation at 0606 UTC 4 June 2018
  • last observed at 0031 UTC on 19 June 2018 by Robert Holmes via Cerro Tololo Inter-American Obs.
Notesrisk, NHATS target
Links  
2018 LK   -     departed
Approximate diameter155 meters (H=21.701)
Closest Earth approach7.62 LD at 2026 UTC on 15 June 2018
Inside ten LD of Earth13 to 18 June 2018
Data based onJPL SSD orbit solution #9 downloaded from JPL on 15 June 2018 UTC
based on 141 observations spanning 60 days
Optical observation  
  • reported from 23 observing codes during 59.4961 days: 246, 703, 807, A17, A53, C23, E08, F51, G34, G40, G96, I52, J22, J69, J95, K38, K91, L01, L04, P93, T08, Y00, Z80
  • first observed at 1348 UTC on 16 April 2018 by Pan-STARRS 1
  • designation assigned to ATLAS Mauna Loa observation at 1340 UTC 4 June 2018
  • last observed at 0143 UTC on 15 June 2018 by Great Shefford Obs.
Links  
2018 KC4   -     departed
Approximate diameter19 meters (H=26.26)
Closest Earth approach2.39 LD at 1456 UTC on 24 May 2018 - Note: JPL reports an approach uncertainty of +/- 9 minutes
Inside Earth SOIduring 24 May 2018
Inside ten LD of Earth20 to 28 May 2018
Data based onJPL SSD orbit solution #1 downloaded from JPL on 15 June 2018 UTC
based on 9 observations spanning one day
Optical observation  
  • reported from 2 observing codes during 1.0429 days: T05, T08
  • designation assigned to ATLAS Mauna Loa observation at 1009 UTC 21 May 2018
  • last observed at 1111 UTC on 22 May 2018 by ATLAS Haleakala
NotesNHATS target
Links  
2018 KU   -     departed
Approximate diameter18 meters (H=26.337)
Closest Earth approach7.56 LD at 1252 UTC on 16 May 2018
Inside ten LD of Earth12 to 20 May 2018
Data based onJPL SSD orbit solution #6 downloaded from JPL on 19 June 2018 UTC
based on 41 observations spanning 28 days
Optical observation  
  • reported from 7 observing codes during 28.2187 days: 474, E23, F51, G96, I52, J95, T12
  • designation assigned to Mt. Lemmon Survey observation at 0705 UTC 18 May 2018
  • last observed at 1220 UTC on 15 June 2018 by UH/Tholen NEO Follow-Up 2.24m Telescope
Links  
2018 JG1   -     departed
Approximate diameter43 meters (H=24.466)
Closest Earth approach5.29 LD at 0050 UTC on 20 May 2018
Inside ten LD of Earth15 to 24 May 2018
Data based onJPL SSD orbit solution #13 downloaded from JPL on 20 June 2018 UTC
based on 83 observations spanning 42 days
Optical observation  
  • reported from 15 observing codes during 42.1537 days: 033, 291, 474, 673, 691, 711, 807, G96, H01, I52, J04, J95, T08, T12, Y28
  • designation assigned to Mt. Lemmon Survey observation at 0418 UTC 8 May 2018
  • last observed at 0800 UTC on 19 June 2018 by Robert Holmes via Cerro Tololo Inter-American Obs.
Notesrisk
Links  
2018 EJ4   -     departed
Approximate diameter186 meters (H=21.3)
Closest Earth approach5.56 LD at 1916 UTC on 10 June 2018
Inside ten LD of Earth4 to 16 June 2018
Data based onJPL SSD orbit solution #61 downloaded from JPL on 12 June 2018 UTC
based on 502 observations spanning 89 days
Optical observation  
  • reported from 42 observing codes during 88.9286 days: 033, 089, 104, 118, 204, 246, 247, 291, 595, 695, 703, 711, 734, A17, A48, A53, C36, C77, F51, G34, G40, G96, H21, H45, I41, I52, J95, K38, K63, K87, L04, T04, T05, T08, T12, U63, V16, W34, W71, Y00, Z21, Z80
  • designation assigned to Mt. Lemmon Survey observation at 1111 UTC 13 March 2018
  • last observed at 0928 UTC on 10 June 2018 by ATLAS Mauna Loa
Notesradar target, NHATS target
Links  
2016 LB   -     distant
Approximate diameter93 meters (H=22.8)
Closest Earth approach
Distance from Earth84.3 LD during the observation period
Data based onJPL SSD orbit solution #12 downloaded from JPL on 12 June 2018 UTC
based on 134 observations spanning 2016-2018
Optical observation  
  • reported from one observing code during 0.636 hours: 291
  • first observed at 0411 UTC on 11 June 2018 by the Spacewatch 1.8m telescope
  • last observed at 0449 UTC on 11 June 2018 by the Spacewatch 1.8m telescope
Notesprevious passage June 2016 at 5.50 LD and observation June 2017
Links  
2015 DP155   -     departed
Approximate diameter162 meters (H=21.6)
Closest Earth approach8.96 LD at 0553 UTC on 11 June 2018
Inside ten LD of Earth6 to 15 June 2018
Data based onJPL SSD orbit solution #110 downloaded from JPL on 23 June 2018 UTC
based on 604 observations spanning 2015-2018
Optical observation  
  • reported from 31 observing codes during 159.1562 days: 073, 089, 204, 246, 291, 595, 691, 695, 703, A48, A53, A98, B18, C51, F51, G34, G96, H45, I41, J43, J69, L04, T03, T05, T08, W34, W71, Y00, Z21, Z43, Z80
  • first observed at 0855 UTC on 14 Jan. 2018 by the Spacewatch 1.8m telescope
  • last observed at 1240 UTC on 22 June 2018 by ATLAS Mauna Loa
NotesNHATS target
previous observation Feb.-Oct. 2015
Links  
478784 2012 UV136   -     distant
Approximate diameter27 meters (H=25.5)
Closest Earth approach
Distance from Earth50.5 LD during the observation period
Data based onJPL SSD orbit solution #36 downloaded from JPL on 16 June 2018 UTC
based on 125 observations spanning 2012-2018
Optical observation  
  • reported from one observing code during 0.000 hours: T12
  • first observed at 1404 UTC on 14 June 2018 by UH/Tholen NEO Follow-Up 2.24m Telescope
  • last observed at 1404 UTC on 14 June 2018 by UH/Tholen NEO Follow-Up 2.24m Telescope
NotesNHATS target
previous passage Nov. 2012 at 5.79 LD, observation Aug.-Oct. 2013, observation Sept. 2014, observation Sept. 2015, observation July-Sept. 2016, and observation July 2017
Links  
450894 2008 BT18   -     distant
Approximate diameter741 meters (H=18.3)
Closest Earth approach
Distance from Earth54.9 - 502.2 LD min-max during the observation period
Data based onJPL SSD orbit solution #93 downloaded from JPL on 22 June 2018 UTC
based on 386 observations spanning 1955-2018 including radar
Optical observation  
  • reported from 7 observing codes during 177.9721 days: 703, F51, G34, G96, I41, T05, T08
  • first observed at 1147 UTC on 25 Dec. 2017 by the Mt. Lemmon Survey
  • last observed at 1107 UTC on 21 June 2018 by the Catalina Sky Survey
Notesprevious passage July 2008 at 5.87 LD and observation Oct. 2015
Links  
207398 2006 AS2   -     distant
Approximate diameter295 meters (H=20.3)
Closest Earth approach
Distance from Earth117.5 LD during the observation period
Data based onJPL SSD orbit solution #73 downloaded from JPL on 15 June 2018 UTC
based on 380 observations spanning 2003-2018 including radar
Optical observation  
  • reported from one observing code during 1.003 hours: G96
  • first observed at 1009 UTC on 14 June 2018 by the Mt. Lemmon Survey
  • last observed at UTC on by MPC code
Notesprevious passage Feb. 2009 at 9.16 LD, observation Jan. 2012, observation Aug. 2012, observation Dec.-Feb. 2015, observation July 2015, and observation Jan. 2018
Links  
68347 2001 KB67   -     departed
Approximate diameter371 meters (H=19.8)
Closest Earth approach9.50 LD at 0245 UTC on 29 May 2018
Inside ten LD of Earth28 to 30 May 2018
Data based onJPL SSD orbit solution #51 downloaded from JPL on 23 June 2018 UTC
based on 465 observations spanning 2001-2018
Optical observation  
  • reported from 21 observing codes during 24.4255 days: 006, 089, 160, 619, 628, 703, D29, F52, G40, G58, G96, I15, I41, J69, J81, K38, T05, T08, W34, W71, Z80
  • first observed at 0041 UTC on 29 May 2018 by N.V. Maigurova via Nikolaev Obs.
  • last observed at 1054 UTC on 22 June 2018 by ATLAS Haleakala
Notesradar target
previous observation June-July 2017
Links  
1999 FN19   -     departed
Approximate diameter112 meters (H=22.4)
Closest Earth approach9.65 LD at 1357 UTC on 7 May 2018
Inside ten LD of Earth5 to 9 May 2018
Data based onJPL SSD orbit solution #75 downloaded from JPL on 21 June 2018 UTC
based on 328 observations spanning 1999-2018 including radar
Optical observation  
  • reported from 17 observing codes during 126.7431 days: 160, 204, 246, 595, 691, 703, 932, B18, C51, D29, F51, G40, G96, T04, T12, Z80, Z84
  • first observed at 0106 UTC on 14 Feb. 2018 by Calar Alto Schmidt
  • last observed at 1856 UTC on 20 June 2018 by Purple Mtn. Obs. Xuyi Station
Radar observation  
  • observed 5 times from one location during 8.625 days
  • first observed at 0100 UTC on 3 May 2018 by Goldstone DSS-14 70m antenna
  • last observed at 1600 UTC 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.