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Legend - object IDs plus links to more info

Data compiled at 1650 UTC on 19 July 2018 for seventeen known objects during a period of seven days from 16 to 22 July 2018. 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 AS2159.2 LD  distant
DP1552015 DP15537.95 LD  departed
FN191999 FN1986.22 LD  departed
JG12018 JG197.25 LD  departed
KB6768347 2001 KB67148.79 LD  departed
LQ22018 LQ213.81 LDapproaching
MC72018 MC731.02 LD  departed
NH2018 NH66.05 LD  departed Moon buzzer
NJ2018 NJ12.20 LD  departed
NL2018 NL31.65 LD  departed
NM2018 NM1.40 LDoutbound
NU2018 NU20.21 LD  departed
NW2018 NW37.32 LD  departed intruder
NX2018 NX6.24 LDoutbound intruder
NY2018 NY20.15 LD+/- 2 minutes  departed
NY65441987 2010 NY6562.09 LD  departed
SD91998 SD998.77 LDapproaching
DateTfc.Time
16 July '18Rept. Line
17 July '18Rept. Line
18 July '18Rept. Line
19 July '18Rept. Line
20 July '18Rept. Line
21 July '18 Line
22 July '18 Line

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

2018 NY   -     departed
Approximate diameter16 meters (H=26.564)
Closest Earth approach7.95 LD at 0837 UTC on 5 July 2018 - Note: JPL reports an approach uncertainty of +/- 2 minutes
Inside ten LD of Earth1 to 8 July 2018
Data based onJPL SSD orbit solution #1 downloaded from JPL on 9 July 2018 UTC
based on 10 observations spanning one day
Optical observation  
  • reported from 3 observing codes during 20.174 hours: F51, H21, J95
  • designation assigned to Pan-STARRS 1 observation at 1125 UTC 8 July 2018
  • last observed at 0735 UTC on 9 July 2018 by ARO Westfield
Links  
2018 NX   -   outbound intruder
Approximate diameter10 meters (H=27.7)
Closest Earth approach0.30 LD at 1811 UTC on 7 July 2018
Inside Earth-Moon system1348 on 6 July until 2234 UTC on 8 July 2018
Inside Earth SOI4 to 10 July 2018
Inside ten LD of Earth24 June until 21 July 2018
Closest Moon approach0.59 LD at 0726 UTC on 7 July 2018
Inside one LD of Moon1121 on 6 July until 0057 UTC on 8 July 2018
Data based onJPL SSD orbit solution #5 downloaded from JPL on 19 July 2018 UTC
based on 29 observations spanning 11 days
Optical observation  
  • reported from 7 observing codes during 10.9853 days: 291, H36, I41, J95, P93, W34, Z80
  • first observed at 0820 UTC on 8 July 2018 by the Palomar Transient Factory
  • designation assigned to Palomar Transient Factory observation at 0844 UTC 8 July 2018
  • last observed at 0759 UTC on 19 July 2018 by the Spacewatch 1.8m telescope
NotesNHATS target
Links  
2018 NW   -     departed intruder
Approximate diameter9 meters (H=27.8)
Closest Earth approach0.32 LD at 0311 UTC on 8 July 2018
Inside Earth-Moon system2225 on 7 July until 0757 UTC on 8 July 2018
Inside Earth SOI7 to 8 July 2018
Inside ten LD of Earth6 to 10 July 2018
Closest Moon approach0.64 LD at 0048 UTC on 8 July 2018
Inside one LD of Moon2100 on 7 July until 0434 UTC on 8 July 2018
Data based onJPL SSD orbit solution #2 downloaded from JPL on 11 July 2018 UTC
based on 19 observations spanning 2 days
Optical observation  
  • reported from 4 observing codes during 2.0151 days: D35, H21, I41, T12
  • first observed at 0822 UTC on 8 July 2018 by the Palomar Transient Factory
  • designation assigned to Palomar Transient Factory observation at 0843 UTC 8 July 2018
  • last observed at 0843 UTC on 10 July 2018 by UH/Tholen NEO Follow-Up 2.24m Telescope
Notesrisk
Links  
2018 NU   -     departed
Approximate diameter24 meters (H=25.752)
Closest Earth approach2.42 LD at 1839 UTC on 6 July 2018
Inside ten LD of Earth2 to 11 July 2018
Data based onJPL SSD orbit solution #2 downloaded from JPL on 9 July 2018 UTC
based on 27 observations spanning one day
Optical observation  
  • reported from 4 observing codes during 1.7495 days: 204, A17, I41, J95
  • designation assigned to Palomar Transient Factory observation at 0441 UTC 7 July 2018
  • last observed at 2240 UTC on 8 July 2018 by Great Shefford Obs.
Links  
2018 NM   -   outbound
Approximate diameter18 meters (H=26.4)
Closest Earth approach1.40 LD at 0528 UTC on 17 July 2018
Inside Earth SOI15 to 18 July 2018
Inside ten LD of Earth10 to 23 July 2018
Closest Moon approach1.06 LD at 0325 UTC on 17 July 2018
Data based onJPL SSD orbit solution #6 downloaded from JPL on 18 July 2018 UTC
based on 36 observations spanning 13 days
Optical observation  
  • reported from 7 observing codes during 13.0111 days: 474, 568, 807, F51, F52, I52, T12
  • first observed at 0655 UTC on 4 July 2018 by Pan-STARRS 2
  • designation assigned to Pan-STARRS 1 observation at 0817 UTC 4 July 2018
  • last observed at 0711 UTC on 17 July 2018 by Mt. John Obs.
NotesNHATS target
Links  
2018 NL   -     departed
Approximate diameter31 meters (H=25.2)
Closest Earth approach1.42 LD at 2018 UTC on 28 June 2018
Inside Earth SOI27 to 29 June 2018
Inside ten LD of Earth23 June until 4 July 2018
Closest Moon approach1.20 LD at 1744 UTC on 28 June 2018
Data based onJPL SSD orbit solution #5 downloaded from JPL on 17 July 2018 UTC
based on 22 observations spanning 12 days
Optical observation  
  • reported from 5 observing codes during 12.1970 days: 734, G96, I52, L01, T12
  • designation assigned to Mt. Lemmon Survey observation at 0940 UTC 3 July 2018
  • last observed at 1423 UTC on 15 July 2018 by UH/Tholen NEO Follow-Up 2.24m Telescope
Notesrisk
Links  
2018 NJ   -     departed
Approximate diameter9 meters (H=27.9)
Closest Earth approach2.37 LD at 0057 UTC on 7 July 2018
Inside Earth SOI6 to 7 July 2018
Inside ten LD of Earth29 June until 14 July 2018
Data based onJPL SSD orbit solution #5 downloaded from JPL on 16 July 2018 UTC
based on 32 observations spanning 10 days
Optical observation  
  • reported from 6 observing codes during 10.3360 days: 104, G96, I52, J95, K63, T12
  • designation assigned to Mt. Lemmon Survey observation at 0635 UTC 5 July 2018
  • last observed at 1439 UTC on 15 July 2018 by UH/Tholen NEO Follow-Up 2.24m Telescope
Notesrisk, NHATS target
Links  
2018 NH   -     departed Moon buzzer
Approximate diameter39 meters (H=24.7)
Closest Earth approach1.13 LD at 1730 UTC on 2 July 2018
Inside Earth SOI2 to 3 July 2018
Inside ten LD of Earth30 June until 4 July 2018
Closest Moon approach0.43 LD at 1835 UTC on 2 July 2018
Inside one LD of Moon1419-2250 UTC on 2 July 2018
Data based onJPL SSD orbit solution #6 downloaded from JPL on 17 July 2018 UTC
based on 83 observations spanning 9 days
Optical observation  
  • reported from 17 observing codes during 8.8983 days: 104, 151, 204, B49, C77, C95, F51, G96, H21, H36, I52, J95, K63, K65, L01, U63, W34
  • designation assigned to Mt. Lemmon Survey observation at 0724 UTC 4 July 2018
  • last observed at 0457 UTC on 13 July 2018 by ARO Westfield
Links  
2018 MC7   -     departed
Approximate diameter22 meters (H=25.9)
Closest Earth approach2.19 LD at 0942 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 1954 UTC on 17 June 2018
Data based onJPL SSD orbit solution #9 downloaded from JPL on 17 July 2018 UTC
based on 37 observations spanning 24 days
Optical observation  
  • reported from 7 observing codes during 24.1324 days: 291, 691, 703, G96, I52, J95, T12
  • designation assigned to Catalina Sky Survey observation at 0927 UTC 21 June 2018
  • last observed at 1238 UTC on 15 July 2018 by UH/Tholen NEO Follow-Up 2.24m Telescope
Notesrisk, NHATS target
Links  
2018 LQ2   -   approaching
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 #22 downloaded from JPL on 17 July 2018 UTC
based on 153 observations spanning 40 days
Optical observation  
  • reported from 16 observing codes during 39.6823 days: 204, 291, 587, 691, 703, 711, D29, F51, F52, G37, G58, G96, H21, H36, I41, I52
  • 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 0518 UTC on 15 July 2018 by the Palomar Transient Factory
NotesNHATS target
Links  
2018 JG1   -     departed
Approximate diameter43 meters (H=24.5)
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 #15 downloaded from JPL on 11 July 2018 UTC
based on 88 observations spanning 63 days
Optical observation  
  • reported from 15 observing codes during 63.4221 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 1426 UTC on 10 July 2018 by UH/Tholen NEO Follow-Up 2.24m Telescope
Notesrisk
Links  
2015 DP155   -     departed
Approximate diameter170 meters (H=21.5)
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 #114 downloaded from JPL on 13 July 2018 UTC
based on 625 observations spanning 2015-2018
Optical observation  
  • reported from 31 observing codes during 179.1351 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 1210 UTC on 12 July 2018 by ATLAS Mauna Loa
NotesNHATS target
previous observation Feb.-Oct. 2015
Links  
441987 2010 NY65   -     departed
Approximate diameter170 meters (H=21.5)
Closest Earth approach7.28 LD at 0905 UTC on 24 June 2018
Inside ten LD of Earth21 to 26 June 2018
Data based onJPL SSD orbit solution #102 downloaded from JPL on 15 July 2018 UTC
based on 551 observations spanning 2010-2018 including radar
Optical observation  
  • reported from 12 observing codes during 18.2673 days: 089, 160, 703, G34, I41, J43, K38, L04, T05, T08, W71, Z80
  • first observed at 0453 UTC on 25 June 2018 by the Palomar Transient Factory
  • last observed at 1118 UTC on 13 July 2018 by ATLAS Mauna Loa
Notesradar target
previous observation July-Aug. 2010, observation June-Aug. 2013, observation June-July 2014, observation June-Aug. 2015, observation June-Aug. 2016, and passage June 2017 at 7.89 LD
Links  
207398 2006 AS2   -     distant
Approximate diameter295 meters (H=20.3)
Closest Earth approach
Distance from Earth117.5 - 150.0 LD min-max during the observation period
Data based onJPL SSD orbit solution #74 downloaded from JPL on 11 July 2018 UTC
based on 384 observations spanning 2003-2018 including radar
Optical observation  
  • reported from 2 observing codes during 26.1737 days: F52, G96
  • first observed at 1009 UTC on 14 June 2018 by the Mt. Lemmon Survey
  • last observed at 1419 UTC on 10 July 2018 by Pan-STARRS 2
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 #62 downloaded from JPL on 11 July 2018 UTC
based on 528 observations spanning 2001-2018
Optical observation  
  • reported from 23 observing codes during 42.3973 days: 006, 089, 160, 619, 628, 703, D29, F52, G40, G58, G96, I15, I41, J69, J81, K38, T05, T08, U63, W34, W55, W71, Z80
  • first observed at 0041 UTC on 29 May 2018 by N.V. Maigurova via Nikolaev Obs.
  • last observed at 1013 UTC on 10 July 2018 by Pan-STARRS 2
Notesradar target
previous observation June-July 2017
Links  
1999 FN19   -     departed
Approximate diameter107 meters (H=22.5)
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 #78 downloaded from JPL on 17 July 2018 UTC
based on 340 observations spanning 1999-2018 including radar
Optical observation  
  • reported from 18 observing codes during 152.4720 days: 160, 204, 246, 595, 691, 703, 932, B18, C51, D29, F51, F52, G40, G96, T04, T12, Z80, Z84
  • first observed at 0106 UTC on 14 Feb. 2018 by Calar Alto Schmidt
  • last observed at 1226 UTC on 16 July 2018 by Pan-STARRS 2
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  
1998 SD9   -   approaching
Approximate diameter49 meters (H=24.2)
Closest Earth approach4.22 LD at 0726 UTC on 29 Aug. 2018
Inside ten LD of Earth25 Aug. until 2 Sept. 2018
Data based onJPL SSD orbit solution #16 downloaded from JPL on 30 June 2018 UTC (dated 6 April 2017 local)
based on 71 observations spanning 1998-2008
Optical observation  
    none recent
Notesprevious observation Aug.-Sept. 2008
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.