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Legend - object IDs plus links to more info

Data compiled at 1726 UTC on 19 Aug. 2018 for 25 known objects during a period of seven days from 16 to 22 Aug. 2018. Orange is for objects with a new JPL orbit solution (usually from new observation).

Chart
ID

Full ID
Period
Closest
Passage
Uncertainty

Status
DG82007 DG888.7 LD  distant
FN191999 FN19157.61 LD  departed
JG12018 JG1166.18 LD  departed
LQ22018 LQ29.51 LDinbound
MC72018 MC762.75 LD  departed
NL2018 NL80.95 LD  departed
NY65441987 2010 NY65158.60 LD  departed
PD92018 PD921.43 LD  departed
PD202018 PD2013.40 LD+/- 2 minutes  departed intruder
PJ202018 PJ2037.24 LD  departed
PK202018 PK207.88 LDoutbound
PM102018 PM1010.03 LD  departed
PM202018 PM208.02 LDoutbound
PN222018 PN227.20 LD+/- 2 minutesoutbound
PO202018 PO2015.90 LD+/- 3 minutes  departed
PO222018 PO228.84 LDoutbound
PP92018 PP916.73 LD+/- one minute  departed
PR72018 PR79.60 LD  departed
PT232018 PT235.57 LDoutbound
PU232018 PU237.80 LD+/- 4 minutesinbound
PY72018 PY727.12 LD  departed Moon buzzer
PY232018 PY231.52 LD+/- one minute  departed Moon buzzer
PZ212018 PZ2117.27 LD+/- one minute  departed
QE2018 QE2.80 LDinbound
SD91998 SD915.85 LDapproaching
DateTfc.Time
16 Aug. '18Rept. Line
17 Aug. '18Rept. Line
18 Aug. '18Rept. Line
19 Aug. '18Rept. Line
20 Aug. '18Rept. Line
21 Aug. '18 Line
22 Aug. '18 Line

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

2018 QE   -   inbound
Approximate diameter9 meters (H=27.907)
Closest Earth approach2.80 LD at 0317 UTC on 20 Aug. 2018
Inside ten LD of Earth10 to 29 Aug. 2018
Data based onJPL SSD orbit solution #2 downloaded from JPL on 19 Aug. 2018 UTC
based on 24 observations spanning 2 days
Optical observation  
  • reported from 6 observing codes during 1.6307 days: 106, 204, 679, 734, L01, T08
  • designation assigned to ATLAS Mauna Loa observation at 1017 UTC 17 Aug. 2018
  • last observed at 0126 UTC on 19 Aug. 2018 by Schiaparelli Obs.
Notesrisk, NHATS target
Links  
2018 PY23   -     departed Moon buzzer
Approximate diameter9 meters (H=27.884)
Closest Earth approach1.32 LD at 2049 UTC on 15 Aug. 2018
Inside Earth SOI15 to 16 Aug. 2018
Inside ten LD of Earth14 to 17 Aug. 2018
Closest Moon approach0.52 LD at 2319 UTC on 15 Aug. 2018
Inside one LD of Moon1948 on 15 Aug. until 0249 UTC on 16 Aug. 2018
Data based onJPL SSD orbit solution #1 downloaded from JPL on 18 Aug. 2018 UTC
based on 9 observations spanning one day
Optical observation  
  • reported from 3 observing codes during 23.753 hours: 568, F51, J95
  • designation assigned to Pan-STARRS 1 observation at 1025 UTC 13 Aug. 2018
  • last observed at 1010 UTC on 14 Aug. 2018 by Marco Micheli via Mauna Kea
Links  
2018 PU23   -   inbound
Approximate diameter8 meters (H=28.122)
Closest Earth approach7.80 LD at 2052 UTC on 23 Aug. 2018 - Note: JPL reports an approach uncertainty of +/- 4 minutes
Inside ten LD of Earth7 Aug. until 13 Sept. 2018
Data based onJPL SSD orbit solution #2 downloaded from JPL on 19 Aug. 2018 UTC
based on 16 observations spanning 8 days
Optical observation  
  • reported from 5 observing codes during 7.8594 days: 291, 568, 679, F51, L01
  • designation assigned to Pan-STARRS 1 observation at 1053 UTC 11 Aug. 2018
  • last observed at 0730 UTC on 19 Aug. 2018 by the Spacewatch 1.8m telescope
Notesrisk, NHATS target
Links  
2018 PT23   -   outbound
Approximate diameter42 meters (H=24.515)
Closest Earth approach5.57 LD at 2106 UTC on 16 Aug. 2018
Inside ten LD of Earth14 to 19 Aug. 2018
Data based onJPL SSD orbit solution #2 downloaded from JPL on 17 Aug. 2018 UTC
based on 18 observations spanning one day
Optical observation  
Links  
2018 PO22   -   outbound
Approximate diameter82 meters (H=23.073)
Closest Earth approach8.84 LD at 0842 UTC on 18 Aug. 2018
Inside ten LD of Earth16 to 20 Aug. 2018
Data based onJPL SSD orbit solution #1 downloaded from JPL on 16 Aug. 2018 UTC
based on 33 observations spanning one day
Optical observation  
  • reported from 7 observing codes during 1.6112 days: 104, 160, 204, C95, J95, L01, T08
  • designation assigned to ATLAS Mauna Loa observation at 0556 UTC 14 Aug. 2018
  • last observed at 2036 UTC on 15 Aug. 2018 by Schiaparelli Obs.
Links  
2018 PN22   -   outbound
Approximate diameter11 meters (H=27.371)
Closest Earth approach6.21 LD at 0817 UTC on 9 Aug. 2018 - Note: JPL reports an approach uncertainty of +/- 2 minutes
Inside ten LD of Earth25 July until 23 Aug. 2018
Data based onJPL SSD orbit solution #2 downloaded from JPL on 17 Aug. 2018 UTC
based on 16 observations spanning 3 days
Optical observation  
  • reported from 5 observing codes during 2.4185 days: 104, 568, F51, J95, L01
  • designation assigned to Pan-STARRS 1 observation at 1359 UTC 13 Aug. 2018
  • last observed at 0002 UTC on 16 Aug. 2018 by Visnjan Obs.
NotesNHATS target
Links  
2018 PZ21   -     departed
Approximate diameter15 meters (H=26.701)
Closest Earth approach6.84 LD at 2049 UTC on 3 Aug. 2018
Inside ten LD of Earth29 July until 9 Aug. 2018
Data based onJPL SSD orbit solution #2 downloaded from JPL on 17 Aug. 2018 UTC
based on 15 observations spanning 5 days
Optical observation  
  • reported from 5 observing codes during 4.9307 days: 568, 679, 807, F51, L01
  • designation assigned to Pan-STARRS 1 observation at 0850 UTC 12 Aug. 2018
  • last observed at 0710 UTC on 17 Aug. 2018 by San Pedro Martir Obs.
Notesrisk, NHATS target
Links  
2018 PO20   -     departed
Approximate diameter16 meters (H=26.582)
Closest Earth approach7.55 LD at 0105 UTC on 7 Aug. 2018 - Note: JPL reports an approach uncertainty of +/- 3 minutes
Inside ten LD of Earth2 to 11 Aug. 2018
Data based onJPL SSD orbit solution #2 downloaded from JPL on 15 Aug. 2018 UTC
based on 14 observations spanning one day
Optical observation  
  • reported from 4 observing codes during 20.798 hours: 568, F51, H21, L01
  • designation assigned to Pan-STARRS 1 observation at 1324 UTC 12 Aug. 2018
  • last observed at 1012 UTC on 13 Aug. 2018 by Marco Micheli via Mauna Kea
NotesNHATS target
Links  
2018 PM20   -   outbound
Approximate diameter18 meters (H=26.385)
Closest Earth approach8.02 LD at 1910 UTC on 16 Aug. 2018
Inside ten LD of Earth13 to 19 Aug. 2018
Data based onJPL SSD orbit solution #1 downloaded from JPL on 14 Aug. 2018 UTC
based on 19 observations spanning one day
Optical observation  
  • reported from 5 observing codes during 1.5955 days: 568, 850, H21, J95, L01
  • designation assigned to R. Wainscoat via Mauna Kea observation at 0922 UTC 12 Aug. 2018
  • last observed at 2340 UTC on 13 Aug. 2018 by Great Shefford Obs.
Links  
2018 PK20   -   outbound
Approximate diameter23 meters (H=25.823)
Closest Earth approach7.88 LD at 1810 UTC on 18 Aug. 2018
Inside ten LD of Earth15 to 22 Aug. 2018
Data based onJPL SSD orbit solution #3 downloaded from JPL on 19 Aug. 2018 UTC
based on 24 observations spanning 5 days
Optical observation  
  • reported from 6 observing codes during 5.4454 days: 104, 160, 734, F51, J95, L01
  • designation assigned to Pan-STARRS 1 observation at 1258 UTC 11 Aug. 2018
  • last observed at 2339 UTC on 16 Aug. 2018 by Castelmartini Obs.
NotesNHATS target
Links  
2018 PJ20   -     departed
Approximate diameter12 meters (H=27.206)
Closest Earth approach6.11 LD at 1600 UTC on 3 Aug. 2018
Inside ten LD of Earth31 July until 6 Aug. 2018
Data based onJPL SSD orbit solution #2 downloaded from JPL on 19 Aug. 2018 UTC
based on 11 observations spanning 10 days
Optical observation  
  • reported from 4 observing codes during 9.9706 days: 568, 679, F51, J04
  • first observed at 0938 UTC on 8 Aug. 2018 by Pan-STARRS 1
  • designation assigned to Pan-STARRS 1 observation at 0954 UTC 8 Aug. 2018
  • last observed at 0856 UTC on 18 Aug. 2018 by San Pedro Martir Obs.
Notesrisk
Links  
2018 PD20   -     departed intruder
Approximate diameter11 meters (H=27.38)
Closest Earth approach0.09 LD at 1430 UTC on 10 Aug. 2018 - Note: JPL reports an approach uncertainty of +/- 2 minutes
Inside Earth-Moon system0500 on 10 Aug. until 0000 UTC on 11 Aug. 2018
Inside Earth SOI9 to 11 Aug. 2018
Inside ten LD of Earth6 to 14 Aug. 2018
Closest Moon approach0.46 LD at 0716 UTC on 10 Aug. 2018
Inside one LD of Moon2258 on 9 Aug. until 1522 UTC on 10 Aug. 2018
Data based onJPL SSD orbit solution #1 downloaded from JPL on 12 Aug. 2018 UTC
based on 32 observations spanning one day
Optical observation  
  • reported from 9 observing codes during 18.295 hours: 104, 204, G34, H21, I19, K61, L01, T08, W34
  • designation assigned to ATLAS Mauna Loa observation at 1119 UTC 11 Aug. 2018
  • last observed at 0536 UTC on 12 Aug. 2018 by ARO Westfield
Links  
2018 PM10   -     departed
Approximate diameter14 meters (H=26.974)
Closest Earth approach3.21 LD at 1416 UTC on 10 Aug. 2018
Inside ten LD of Earth5 to 15 Aug. 2018
Data based onJPL SSD orbit solution #3 downloaded from JPL on 14 Aug. 2018 UTC
based on 77 observations spanning 4 days
Optical observation  
  • reported from 16 observing codes during 4.6034 days: 104, 160, 204, I19, J69, J77, J95, K51, K61, K63, L01, L04, P93, Q62, Q66, Z80
  • designation assigned to JAXA Janess-G observation at 1036 UTC 9 Aug. 2018
  • last observed at 0105 UTC on 14 Aug. 2018 by Great Shefford Obs.
Links  
2018 PP9   -     departed
Approximate diameter22 meters (H=25.932)
Closest Earth approach1.63 LD at 1452 UTC on 3 Aug. 2018
Inside Earth SOI2 to 4 Aug. 2018
Inside ten LD of Earth27 July until 10 Aug. 2018
Closest Moon approach1.85 LD at 0625 UTC on 4 Aug. 2018
Data based onJPL SSD orbit solution #1 downloaded from JPL on 10 Aug. 2018 UTC
based on 24 observations spanning 3 days
Optical observation  
  • reported from 5 observing codes during 2.5451 days: 711, F51, J04, L01, T05
  • designation assigned to ATLAS Haleakala observation at 1323 UTC 7 Aug. 2018
  • last observed at 0228 UTC on 10 Aug. 2018 by ESA Optical Ground Station
NotesNHATS target
Links  
2018 PD9   -     departed
Approximate diameter11 meters (H=27.481)
Closest Earth approach5.31 LD at 0909 UTC on 1 Aug. 2018
Inside ten LD of Earth26 July until 7 Aug. 2018
Data based onJPL SSD orbit solution #3 downloaded from JPL on 15 Aug. 2018 UTC
based on 24 observations spanning 7 days
Optical observation  
  • reported from 5 observing codes during 7.0888 days: 474, 568, F51, J04, T12
  • designation assigned to Pan-STARRS 1 observation at 0857 UTC 7 Aug. 2018
  • last observed at 1104 UTC on 14 Aug. 2018 by Pan-STARRS 1
NotesNHATS target
Links  
2018 PY7   -     departed Moon buzzer
Approximate diameter15 meters (H=26.789)
Closest Earth approach1.07 LD at 2102 UTC on 3 Aug. 2018
Inside Earth SOI2 to 4 Aug. 2018
Inside ten LD of Earth30 July until 8 Aug. 2018
Closest Moon approach0.71 LD at 0105 UTC on 4 Aug. 2018
Inside one LD of Moon1758 on 3 Aug. until 0812 UTC on 4 Aug. 2018
Data based onJPL SSD orbit solution #6 downloaded from JPL on 18 Aug. 2018 UTC
based on 31 observations spanning 9 days
Optical observation  
  • reported from 7 observing codes during 8.8003 days: 711, H21, J04, J95, L01, T05, T12
  • designation assigned to ATLAS Haleakala observation at 1327 UTC 5 Aug. 2018
  • last observed at 0840 UTC on 14 Aug. 2018 by UH/Tholen NEO Follow-Up 2.24m Telescope
Notesrisk
Links  
2018 PR7   -     departed
Approximate diameter7 meters (H=28.531)
Closest Earth approach1.36 LD at 0158 UTC on 6 Aug. 2018
Inside Earth SOI4 to 8 Aug. 2018
Inside ten LD of Earth26 July until 16 Aug. 2018
Closest Moon approach1.85 LD at 2012 UTC on 5 Aug. 2018
Data based onJPL SSD orbit solution #6 downloaded from JPL on 17 Aug. 2018 UTC
based on 55 observations spanning 8 days
Optical observation  
  • reported from 11 observing codes during 8.1407 days: 104, 474, 711, H21, I41, J04, J95, K63, L01, L04, T12
  • first observed at 0623 UTC on 6 Aug. 2018 by the Palomar Transient Factory
  • designation assigned to Palomar Transient Factory observation at 0634 UTC 6 Aug. 2018
  • last observed at 0945 UTC on 14 Aug. 2018 by UH/Tholen NEO Follow-Up 2.24m Telescope
Notesrisk, NHATS target
previous passage Feb. 2016 at 9.53 LD +/- 3 mins. uncertainty (unobserved)
Links  
2018 NL   -     departed
Approximate diameter29 meters (H=25.3)
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 #10 downloaded from JPL on 12 Aug. 2018 UTC
based on 33 observations spanning 39 days
Optical observation  
  • reported from 7 observing codes during 39.1571 days: 695, 734, G96, H21, I52, L01, T12
  • designation assigned to Mt. Lemmon Survey observation at 0940 UTC 3 July 2018
  • last observed at 1326 UTC on 11 Aug. 2018 by UH/Tholen NEO Follow-Up 2.24m Telescope
Notesrisk
Links  
2018 MC7   -     departed
Approximate diameter20 meters (H=26.1)
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 #14 downloaded from JPL on 12 Aug. 2018 UTC
based on 45 observations spanning 51 days
Optical observation  
  • reported from 9 observing codes during 51.1032 days: 291, 691, 695, 703, G96, H21, I52, J95, T12
  • designation assigned to Catalina Sky Survey observation at 0927 UTC 21 June 2018
  • last observed at 1156 UTC on 11 Aug. 2018 by UH/Tholen NEO Follow-Up 2.24m Telescope
Notesrisk, NHATS target
Links  
2018 LQ2   -   inbound
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 #37 downloaded from JPL on 19 Aug. 2018 UTC
based on 206 observations spanning 75 days
Optical observation  
  • reported from 23 observing codes during 74.7679 days: 157, 204, 291, 587, 595, 691, 703, 711, A17, D29, F51, F52, G37, G58, G96, H21, H36, I41, I52, K87, P93, T08, Z43
  • 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 0721 UTC on 19 Aug. 2018 by the Spacewatch 1.8m telescope
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 #17 downloaded from JPL on 12 Aug. 2018 UTC
based on 91 observations spanning 95 days
Optical observation  
  • reported from 15 observing codes during 95.2670 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 1043 UTC on 11 Aug. 2018 by UH/Tholen NEO Follow-Up 2.24m Telescope
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 #106 downloaded from JPL on 11 Aug. 2018 UTC
based on 564 observations spanning 2010-2018 including radar
Optical observation  
  • reported from 14 observing codes during 39.1556 days: 089, 160, 703, F51, G34, I41, J43, K38, L04, T05, T08, V04, W71, Z80
  • first observed at 0453 UTC on 25 June 2018 by the Palomar Transient Factory
  • last observed at 0837 UTC on 3 Aug. 2018 by Pan-STARRS 1
Radar observation  
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  
2007 DG8   -     distant
Approximate diameter29 meters (H=25.3)
Closest Earth approach
Distance from Earth22.0 - 68.8 LD min-max during the observation period
Data based onJPL SSD orbit solution #10 downloaded from JPL on 11 Aug. 2018 UTC (dated 9 Aug. 2018 local)
based on 42 observations spanning 2007-2018
Optical observation  
  • reported from 2 observing codes during 21.8965 days: F51, F52
  • first observed at 1202 UTC on 17 July 2018 by Pan-STARRS 2
  • last observed at 0932 UTC on 8 Aug. 2018 by Pan-STARRS 1
NotesNHATS target
previous passage March 2007 at 9.84 LD
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 #80 downloaded from JPL on 12 Aug. 2018 UTC
based on 349 observations spanning 1999-2018 including radar
Optical observation  
  • reported from 18 observing codes during 178.3907 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 1029 UTC on 11 Aug. 2018 by Pan-STARRS 1
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.