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Legend - object IDs plus links to more info

Data compiled at 1933 UTC on 23 Aug. 2019 for 20 known objects during a period of seven days from 20 to 26 Aug. 2019. 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
DB2008 DB52.2 LD  distant
HM102015 HM1062.2 LD  distant
NN42019 NN420.04 LD  departed
NW22019 NW292.86 LD  departed
OL2019 OL28.73 LD  departed
OU12019 OU15.09 LD+/- one minuteapproaching
PC12019 PC141.33 LD+/- 4 minutes  departed
PE12019 PE168.5 LD+/- 4.0167 hours  departed
PH12019 PH148.33 LD  departed
PH32019 PH38.8 LD> 10 days  departed
PJ2019 PJ15.40 LD  departed
PK92015 PK954.9 LD  distant
PO12019 PO115.5 LD+/- 21 minutes  departed
PS12019 PS122.93 LD  departed
PT2019 PT20.80 LD  departed
PU2019 PU19.43 LD  departed
QD2019 QD0.78 LDoutbound intruder
QE2019 QE3.49 LDoutbound
QF2019 QF2.39 LDoutbound
QS2019 QS8.6 LD+/- 16 minutesapproaching
DateTfc.Time
20 Aug. '19Rept. Line
21 Aug. '19Rept. Line
22 Aug. '19Rept. Line
23 Aug. '19Rept. Line
24 Aug. '19Rept. Line
25 Aug. '19 Line
26 Aug. '19 Line

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

2019 QS   -   approaching
Approximate diameter42 meters (H=24.554)
Closest Earth approach5.48 LD at 0631 UTC on 28 Aug. 2019 - Note: JPL reports an approach uncertainty of +/- 16 minutes
Inside ten LD of Earth26 to 29 Aug. 2019
Data based onJPL SSD orbit solution #1 downloaded from JPL on 23 Aug. 2019 UTC
based on 19 observations spanning 2 days
Optical observation  
  • reported from 4 observing codes during 1.7400 days: 291, G96, I52, I93
  • designation assigned to Mt. Lemmon Survey observation at 0644 UTC 21 Aug. 2019
  • last observed at 0030 UTC on 23 Aug. 2019 by St. Pardon de Conques Obs.
Notesrisk
Links  
2019 QF   -   outbound
Approximate diameter8 meters (H=28.144)
Closest Earth approach2.39 LD at 1105 UTC on 20 Aug. 2019
Inside Earth SOIduring 20 Aug. 2019
Inside ten LD of Earth16 to 24 Aug. 2019
Data based onJPL SSD orbit solution #1 downloaded from JPL on 22 Aug. 2019 UTC
based on 14 observations
Optical observation  
  • reported from 3 observing codes during 16.150 hours: G96, I52, I93
  • designation assigned to Mt. Lemmon Survey observation at 0543 UTC 21 Aug. 2019
  • last observed at 2152 UTC on 21 Aug. 2019 by St. Pardon de Conques Obs.
Notesrisk
Links  
2019 QE   -   outbound
Approximate diameter13 meters (H=27.127)
Closest Earth approach3.49 LD at 1012 UTC on 20 Aug. 2019
Inside ten LD of Earth15 to 25 Aug. 2019
Data based onJPL SSD orbit solution #1 downloaded from JPL on 22 Aug. 2019 UTC
based on 51 observations spanning one day
Optical observation  
  • reported from 13 observing codes during 1.6734 days: 703, 958, A44, E23, F51, F52, G34, H21, I52, I93, L01, L29, Z80
  • first observed at 0702 UTC on 20 Aug. 2019 by Pan-STARRS 1
  • designation assigned to Catalina Sky Survey observation at 0452 UTC 21 Aug. 2019
  • last observed at 2311 UTC on 21 Aug. 2019 by Dax Obs.
Notesrisk
Links  
2019 QD   -   outbound intruder
Approximate diameter6 meters (H=28.754)
Closest Earth approach0.78 LD at 0127 UTC on 22 Aug. 2019
Inside Earth-Moon system2101 on 21 Aug. until 0553 UTC on 22 Aug. 2019
Inside Earth SOI21 to 22 Aug. 2019
Inside ten LD of Earth19 to 25 Aug. 2019
Closest Moon approach0.63 LD at 0138 UTC on 22 Aug. 2019
Inside one LD of Moon1944 on 21 Aug. until 0731 UTC on 22 Aug. 2019
Data based onJPL SSD orbit solution #1 downloaded from JPL on 22 Aug. 2019 UTC
based on 20 observations
Optical observation  
  • reported from 4 observing codes during 15.581 hours: G96, I52, I93, J95
  • designation assigned to Mt. Lemmon Survey observation at 0547 UTC 21 Aug. 2019
  • last observed at 2122 UTC on 21 Aug. 2019 by St. Pardon de Conques Obs.
Notesrisk
Links  
2019 PH3   -     departed
Approximate diameter37 meters (H=24.8)
Closest Earth approach3.50 LD at 0118 UTC on 17 Aug. 2019 - Note: JPL indicates an approach uncertainty greater than 10 days
Inside ten LD of Earth13 to 20 Aug. 2019
Data based onnon-JPL orbit solution downloaded from JPL on 17 Aug. 2019 UTC
based on 57 observations spanning 3 days
Optical observation  
  • reported from 7 observing codes during 2.8278 days: 160, A44, G34, I19, I41, K83, L01
  • first observed at 0341 UTC on 14 Aug. 2019 by the Zwicky Transient Facility
  • designation assigned to Zwicky Transient Facility observation at 0655 UTC 15 Aug. 2019
  • last observed at 2333 UTC on 16 Aug. 2019 by Castelmartini Obs.
Links  
2019 PS1   -     departed
Approximate diameter15 meters (H=26.775)
Closest Earth approach2.01 LD at 1709 UTC on 9 Aug. 2019
Inside Earth SOI9 to 10 Aug. 2019
Inside ten LD of Earth5 to 14 Aug. 2019
Closest Moon approach2.15 LD at 1728 UTC on 9 Aug. 2019
Data based onJPL SSD orbit solution #2 downloaded from JPL on 12 Aug. 2019 UTC
based on 49 observations spanning one day
Optical observation  
  • reported from 11 observing codes during 22.795 hours: 104, 160, 595, C95, G34, H21, I41, J95, L01, L34, Z80
  • designation assigned to Zwicky Transient Facility observation at 0724 UTC 10 Aug. 2019
  • last observed at 0612 UTC on 11 Aug. 2019 by ARO Westfield
Links  
2019 PO1   -     departed
Approximate diameter9 meters (H=27.845)
Closest Earth approach7.52 LD at 0455 UTC on 14 July 2019 - Note: JPL reports an approach uncertainty of +/- 21 minutes
Inside ten LD of Earth25 June until 3 Aug. 2019
Data based onJPL SSD orbit solution #4 downloaded from JPL on 20 Aug. 2019 UTC
based on 25 observations spanning 11 days
Optical observation  
  • reported from 6 observing codes during 10.7234 days: 291, 691, F51, H21, L01, T14
  • designation assigned to Pan-STARRS 1 observation at 1245 UTC 9 Aug. 2019
  • last observed at 0606 UTC on 20 Aug. 2019 by the Spacewatch 1.8m telescope
Notesrisk, NHATS target
Links  
2019 PH1   -     departed
Approximate diameter35 meters (H=24.908)
Closest Earth approach2.06 LD at 0528 UTC on 7 Aug. 2019
Inside Earth SOI6 to 7 Aug. 2019
Inside ten LD of Earth4 to 9 Aug. 2019
Closest Moon approach1.73 LD at 0330 UTC on 7 Aug. 2019
Data based onJPL SSD orbit solution #5 downloaded from JPL on 22 Aug. 2019 UTC
based on 50 observations spanning 11 days
Optical observation  
  • reported from 11 observing codes during 10.8468 days: 104, 106, 203, 595, C95, F52, I52, K63, K88, L01, T08
  • first observed at 1021 UTC on 8 Aug. 2019 by Pan-STARRS 2
  • designation assigned to ATLAS Mauna Loa observation at 1021 UTC 9 Aug. 2019
  • last observed at 0641 UTC on 19 Aug. 2019 by Steward Obs. Mt. Lemmon Station
Links  
2019 PE1   -     departed
Approximate diameter42 meters (H=24.513)
Closest Earth approach9.49 LD at 0347 UTC on 26 July 2019 - Note: JPL reports an approach uncertainty of +/- 4.0167 hours
Inside ten LD of Earth24 to 27 July 2019
Data based onJPL SSD orbit solution #1 downloaded from JPL on 9 Aug. 2019 UTC
based on 11 observations spanning 2 days
Optical observation  
  • reported from 3 observing codes during 1.4657 days: F51, H21, L01
  • designation assigned to Pan-STARRS 1 observation at 1315 UTC 7 Aug. 2019
  • last observed at 0025 UTC on 9 Aug. 2019 by Visnjan Obs.
Links  
2019 PC1   -     departed
Approximate diameter21 meters (H=26.038)
Closest Earth approach2.15 LD at 0553 UTC on 6 Aug. 2019 - Note: JPL reports an approach uncertainty of +/- 4 minutes
Inside Earth SOI5 to 6 Aug. 2019
Inside ten LD of Earth2 to 9 Aug. 2019
Closest Moon approach2.07 LD at 0028 UTC on 6 Aug. 2019
Data based onJPL SSD orbit solution #2 downloaded from JPL on 11 Aug. 2019 UTC
based on 17 observations spanning one day
Optical observation  
  • reported from 5 observing codes during 1.1283 days: E23, F52, H36, L34, T08
  • first observed at 1157 UTC on 8 Aug. 2019 by Pan-STARRS 2
  • designation assigned to ATLAS Mauna Loa observation at 1244 UTC 8 Aug. 2019
  • last observed at 1502 UTC on 9 Aug. 2019 by Arcadia Obs.
Links  
2019 PU   -     departed
Approximate diameter24 meters (H=25.769)
Closest Earth approach8.31 LD at 0354 UTC on 7 Aug. 2019
Inside ten LD of Earth3 to 11 Aug. 2019
Data based onJPL SSD orbit solution #5 downloaded from JPL on 21 Aug. 2019 UTC
based on 44 observations spanning 41 days
Optical observation  
  • reported from 10 observing codes during 40.6694 days: 160, A17, A44, C95, F51, I93, J95, K19, T05, T08
  • first observed at 0821 UTC on 1 July 2019 by Pan-STARRS 1
  • designation assigned to ATLAS Haleakala observation at 0946 UTC 7 Aug. 2019
  • last observed at 0025 UTC on 11 Aug. 2019 by Great Shefford Obs.
Links  
2019 PT   -     departed
Approximate diameter22 meters (H=25.919)
Closest Earth approach4.49 LD at 0806 UTC on 5 Aug. 2019
Inside ten LD of Earth29 July until 11 Aug. 2019
Data based onJPL SSD orbit solution #2 downloaded from JPL on 16 Aug. 2019 UTC
based on 20 observations spanning 16 days
Optical observation  
  • reported from 3 observing codes during 15.7716 days: F51, J95, T05
  • first observed at 0627 UTC on 26 July 2019 by Pan-STARRS 1
  • designation assigned to ATLAS Haleakala observation at 0736 UTC 7 Aug. 2019
  • last observed at 0058 UTC on 11 Aug. 2019 by Great Shefford Obs.
Links  
2019 PJ   -     departed
Approximate diameter58 meters (H=23.847)
Closest Earth approach8.74 LD at 0018 UTC on 16 Aug. 2019
Inside ten LD of Earth14 to 17 Aug. 2019
Data based onJPL SSD orbit solution #3 downloaded from JPL on 19 Aug. 2019 UTC
based on 31 observations spanning 8 days
Optical observation  
  • reported from 8 observing codes during 7.6324 days: 474, 850, C95, E23, F51, H21, J22, L01
  • designation assigned to Pan-STARRS 1 observation at 1133 UTC 5 Aug. 2019
  • last observed at 0244 UTC on 13 Aug. 2019 by Tacande Obs.
Links  
2019 OU1   -   approaching
Approximate diameter94 meters (H=22.773)
Closest Earth approach2.68 LD at 1035 UTC on 28 Aug. 2019
Inside ten LD of Earth25 to 31 Aug. 2019
Data based onJPL SSD orbit solution #12 downloaded from JPL on 23 Aug. 2019 UTC
based on 60 observations spanning 28 days
Optical observation  
  • reported from 15 observing codes during 28.5370 days: 291, 474, 595, 691, 703, 807, C95, F51, F52, H21, J69, K92, K93, L06, Q63
  • designation assigned to Pan-STARRS 1 observation at 0912 UTC 25 July 2019
  • last observed at 2205 UTC on 22 Aug. 2019 by Sormano2 Obs.
Links  
2019 OL   -     departed
Approximate diameter22 meters (H=25.899)
Closest Earth approach5.10 LD at 0032 UTC on 25 July 2019
Inside ten LD of Earth17 July until 1 Aug. 2019
Data based onJPL SSD orbit solution #8 downloaded from JPL on 21 Aug. 2019 UTC
based on 119 observations spanning 28 days
Optical observation  
  • reported from 25 observing codes during 28.2597 days: 104, 160, 246, 291, 474, 595, 734, 850, 958, A17, C77, C95, E23, H21, I41, I93, J69, J95, K61, K63, L01, L34, T08, W34, Z80
  • designation assigned to Zwicky Transient Facility observation at 0507 UTC 24 July 2019
  • last observed at 1121 UTC on 21 Aug. 2019 by the Spacewatch 1.8m telescope
NotesNHATS target
Links  
2019 NN4   -     departed
Approximate diameter25 meters (H=25.664)
Closest Earth approach6.61 LD at 0122 UTC on 29 July 2019
Inside ten LD of Earth20 July until 6 Aug. 2019
Data based onJPL SSD orbit solution #10 downloaded from JPL on 20 Aug. 2019 UTC
based on 58 observations spanning 104 days
Optical observation  
  • reported from 12 observing codes during 103.9227 days: 246, 291, 568, A17, F51, F52, H21, I41, I52, K38, V37, Z80
  • first observed at 1037 UTC on 8 May 2019 by Pan-STARRS 1
  • designation assigned to Pan-STARRS 1 observation at 0747 UTC 5 July 2019
  • last observed at 0846 UTC on 20 Aug. 2019 by the Spacewatch 1.8m telescope
NotesNHATS target
Links  
2019 NW2   -     departed
Approximate diameter17 meters (H=26.515)
Closest Earth approach5.72 LD at 1957 UTC on 2 July 2019
Inside ten LD of Earth28 June until 7 July 2019
Data based onJPL SSD orbit solution #5 downloaded from JPL on 13 Aug. 2019 UTC
based on 27 observations spanning 41 days
Optical observation  
  • reported from 6 observing codes during 41.2968 days: 291, F51, I41, J04, T12, T14
  • first observed at 0709 UTC on 2 July 2019 by the Zwicky Transient Facility
  • designation assigned to Zwicky Transient Facility observation at 0725 UTC 2 July 2019
  • last observed at 1416 UTC on 12 Aug. 2019 by UH/Tholen NEO Follow-Up CFH Telescope
Notesrisk
Links  
2015 PK9   -     distant
Approximate diameter62 meters (H=23.7)
Closest Earth approach
Distance from Earth55.4 LD during the observation period
Data based onJPL SSD orbit solution #27 downloaded from JPL on 21 Aug. 2019 UTC
based on 269 observations spanning 2015-2019 including radar
Optical observation  
  • reported from one observing code during 0.307 hours: 291
  • first observed at 1125 UTC on 20 Aug. 2019 by the Spacewatch 1.8m telescope
  • last observed at 1143 UTC on 20 Aug. 2019 by the Spacewatch 1.8m telescope
NotesNHATS target
previous passage Aug. 2015 at 5.77 LD and observation Feb. 2019
Links  
2015 HM10   -     distant
Approximate diameter65 meters (H=23.6)
Closest Earth approach
Distance from Earth12.2 - 65.7 LD min-max during the observation period
Data based onJPL SSD orbit solution #38 downloaded from JPL on 22 Aug. 2019 UTC
based on 215 observations spanning 2015-2019 including radar
Optical observation  
  • reported from 6 observing codes during 32.1023 days: 104, A17, G34, G96, J69, T08
  • first observed at 0720 UTC on 20 July 2019 by ATLAS Mauna Loa
  • last observed at 0948 UTC on 21 Aug. 2019 by the Mt. Lemmon Survey
Notesprevious passage July 2015 at 1.15 LD and observation April 2019
Links  
2008 DB   -     distant
Approximate diameter25 meters (H=25.7)
Closest Earth approach
Distance from Earth52.8 - 53.1 LD min-max during the observation period
Data based onJPL SSD orbit solution #16 downloaded from JPL on 19 Aug. 2019 UTC
based on 67 observations spanning 2008-2019
Optical observation  
  • reported from one observing code during 4.9954 days: T14
  • first observed at 0621 UTC on 13 Aug. 2019 by UH/Tholen NEO Follow-Up CFH Telescope
  • last observed at 0614 UTC on 18 Aug. 2019 by UH/Tholen NEO Follow-Up CFH Telescope
Notesrisk, NHATS target
previous passage Feb. 2008 at 4.09 LD
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.