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Legend - object IDs plus links to more info

Data compiled at 1900 UTC on 16 Aug. 2017 for thirteen known objects during a period of seven days from 13 to 19 Aug. 2017. 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
CS2017 CS180.21 LD  departed
CU132014 CU1376.9 LD  distant
NB72017 NB711.08 LD+/- 3 minutes  departed
OE72017 OE718.54 LD  departed
OL192017 OL1981.6 LD+/- 10 minutes  departed
OZ672017 OZ6763.12 LD+/- 6 minutes  departed
PD252017 PD259.62 LDpassing
PK252017 PK252.22 LDoutbound
PV252017 PV256.76 LDinbound
TC42012 TC496.37 LDapproaching intruder
TE492005 TE49149.9 LD+/- 10.1167 hoursapproaching
VB1989 VB55.94 LDapproaching
VP11171576 1999 VP11399.00 LDapproaching
DateTfc.Time
13 Aug. '17Rept. Line
14 Aug. '17Rept. Line
15 Aug. '17Rept. Line
16 Aug. '17Rept. Line
17 Aug. '17Rept. Line
18 Aug. '17 Line
19 Aug. '17 Line

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

2017 PV25   -   inbound
Approximate diameter35 meters (H=24.903)
Closest Earth approach5.50 LD at 1615 UT on 22 Aug. 2017
Inside ten LD of Earth16 to 28 Aug. 2017
Data based onJPL SSD orbit solution #1 downloaded from JPL on 16 Aug. 2017 UTC
based on 24 observations spanning 22 days
Optical observation  
  • reported from 5 observing codes during 22.4885 days: 107, F51, J69, J95, T08
  • first observed at 1152 UT on 24 July 2017 by Pan-STARRS 1
  • designation assigned to ATLAS Mauna Loa observation at 1109 UT 15 Aug. 2017
  • last observed at 2336 UT on 15 Aug. 2017 by Great Shefford Obs.
Links  
2017 PK25   -   outbound
Approximate diameter30 meters (H=25.298)
Closest Earth approach2.22 LD at 0206 UT on 14 Aug. 2017
Inside Earth SOI13 to 14 Aug. 2017
Inside ten LD of Earth11 to 16 Aug. 2017
Closest Moon approach2.17 LD at 2131 UT on 13 Aug. 2017
Data based onJPL SSD orbit solution #1 downloaded from JPL on 14 Aug. 2017 UTC
based on 14 observations spanning 2 days
Optical observation  
  • reported from 4 observing codes during 1.5425 days: 900, C95, T08, Y00
  • designation assigned to ATLAS Mauna Loa observation at 1158 UT 12 Aug. 2017
  • last observed at 0100 UT on 14 Aug. 2017 by SONEAR
Links  
2017 PD25   -   passing
Approximate diameter29 meters (H=25.302)
Closest Earth approach9.62 LD at 0345 UT on 16 Aug. 2017
Inside ten LD of Earth14 to 17 Aug. 2017
Data based onJPL SSD orbit solution #4 downloaded from JPL on 16 Aug. 2017 UTC
based on 36 observations spanning 3 days
Optical observation  
  • reported from 10 observing codes during 3.6374 days: 104, 900, C47, C77, E23, F51, H21, H36, J95, W25
  • first observed at 0837 UT on 12 Aug. 2017 by Pan-STARRS 1
  • designation assigned to Pan-STARRS 1 observation at 0855 UT 12 Aug. 2017
  • last observed at 2355 UT on 15 Aug. 2017 by Great Shefford Obs.
Links  
2017 OZ67   -     departed
Approximate diameter13 meters (H=27.042)
Closest Earth approach9.58 LD at 0235 UT on 11 July 2017 - Note: JPL reports an approach uncertainty of +/- 6 minutes
Inside ten LD of Earth9 to 12 July 2017
Data based onJPL SSD orbit solution #2 downloaded from JPL on 7 Aug. 2017 UTC
based on 11 observations spanning 4 days
Optical observation  
  • reported from 3 observing codes during 4.0265 days: 568, F51, T14
  • designation assigned to Pan-STARRS 1 observation at 1012 UT 26 July 2017
  • last observed at 1051 UT on 30 July 2017 by UH/Tholen NEO Follow-Up CFH Telescope
Links  
2017 OL19   -     departed
Approximate diameter61 meters (H=23.718)
Closest Earth approach8.67 LD at 0814 UT on 12 July 2017 - Note: JPL reports an approach uncertainty of +/- 10 minutes
Inside ten LD of Earth10 to 14 July 2017
Data based onJPL SSD orbit solution #3 downloaded from JPL on 9 Aug. 2017 UTC
based on 16 observations spanning 4 days
Optical observation  
  • reported from 3 observing codes during 4.0181 days: 568, F51, H21
  • designation assigned to Pan-STARRS 1 observation at 0657 UT 26 July 2017
  • last observed at 0723 UT on 30 July 2017 by Marco Micheli via Mauna Kea
Links  
2017 OE7   -     departed
Approximate diameter19 meters (H=26.28)
Closest Earth approach4.49 LD at 1642 UT on 26 July 2017
Inside ten LD of Earth18 July until 4 Aug. 2017
Data based onJPL SSD orbit solution #7 downloaded from JPL on 11 Aug. 2017 UTC
based on 52 observations spanning 11 days
Optical observation  
  • reported from 9 observing codes during 11.1252 days: 104, 160, F51, J95, K88, P93, T05, T08, W25
  • designation assigned to ATLAS Mauna Loa observation at 1138 UT 24 July 2017
  • last observed at 1439 UT on 4 Aug. 2017 by Pan-STARRS 1
Notesrisk
Links  
2017 NB7   -     departed
Approximate diameter77 meters (H=23.23)
Closest Earth approach6.83 LD at 1044 UT on 6 Aug. 2017 - Note: JPL reports an approach uncertainty of +/- 3 minutes
Inside ten LD of Earth31 July until 11 Aug. 2017
Data based onJPL SSD orbit solution #1 downloaded from JPL on 28 July 2017 UTC
based on 18 observations spanning 26 days
Optical observation  
Links  
2017 CS   -     departed
Approximate diameter446 meters (H=19.4)
Closest Earth approach7.93 LD at 1543 UT on 29 May 2017
Inside ten LD of Earth26 May until 1 June 2017
Data based onJPL SSD orbit solution #123 downloaded from JPL on 15 Aug. 2017 UTC
based on 1169 observations spanning 206 days including radar
Optical observation  
  • reported from 62 observing codes during 205.6559 days: 073, 089, 104, 107, 108, 118, 151, 160, 204, 238, 291, 619, 691, 695, 703, 807, 926, A48, A53, B66, B67, C47, C77, C97, D29, F51, G34, G40, G45, G48, G96, H21, H45, J69, K14, K17, K38, K40, K65, K73, K74, K91, L04, P93, Q62, T05, T08, U69, V83, W08, W25, W33, W34, W85, W88, Y00, Z21, Z43, Z45, Z73, Z80, Z92
  • first observed at 1339 UT on 20 Jan. 2017 by Pan-STARRS 1
  • designation assigned to Pan-STARRS 1 observation at 1205 UT 2 Feb. 2017
  • last observed at 0524 UT on 14 Aug. 2017 by ARO Westfield
Radar observation  
  • observed 12 times from one location during 9.3056 days
  • first observed at 2200 UT on 22 May 2017 by Goldstone DSS-14 70m antenna
  • last observed at 0520 UT on 1 June 2017 by Goldstone DSS-14 70m antenna
Notesradar target
Links  
2014 CU13   -     distant
Approximate diameter141 meters (H=21.9)
Distance from Earth82.3 LD during the observation period
Data based onJPL SSD orbit solution #38 downloaded from JPL on 16 Aug. 2017 UTC
based on 445 observations spanning 2014-2017 including radar
Optical observation  
  • reported from one observing code during 0.082 hours: 291
  • first observed at 1038 UT on 16 Aug. 2017 by the Spacewatch 1.8m telescope
  • last observed at 1043 UT on 16 Aug. 2017 by the Spacewatch 1.8m telescope
Notesprevious passage March 2014 at 8.03 LD
Links  
2012 TC4   -   approaching intruder
Approximate diameter15 meters (H=26.7)
Closest Earth approach0.13 LD at 0541 UT on 12 Oct. 2017
Inside Earth-Moon system1408 on 11 Oct. until 2114 UT on 12 Oct. 2017
Inside Earth SOI10 to 13 Oct. 2017
Inside ten LD of Earth5 to 18 Oct. 2017
Closest Moon approach0.72 LD at 1918 UT on 12 Oct. 2017
Inside one LD of Moon0712 on 12 Oct. until 0728 UT on 13 Oct. 2017
Data based onJPL SSD orbit solution #27 downloaded from JPL on 6 Aug. 2017 UTC
based on 228 observations spanning 2012-2017
Optical observation  
  • reported from one observing code during 9.1506 days: 309
  • first observed at 0554 UT on 27 July 2017 by Marco Micheli via Cerro Paranal
  • last observed at 0931 UT on 5 Aug. 2017 by Marco Micheli via Cerro Paranal
Notesrisk, radar target, NHATS target
previous passage Oct. 2012 at 0.25 LD
Links  
2005 TE49   -   approaching
Approximate diameter15 meters (H=26.7)
Closest Earth approach8.47 LD at 1825 UT on 13 Oct. 2017 - Note: JPL reports an approach uncertainty of +/- 10.1167 hours
Inside ten LD of Earth11 to 15 Oct. 2017
Data based onJPL SSD orbit solution #7 downloaded from JPL on 6 Aug. 2017 UTC (dated 6 April 2017 local)
based on 7 observations spanning 3 days
Optical observation  
    none recent
NotesNHATS target
Links  
171576 1999 VP11   -   approaching
Approximate diameter645 meters (H=18.6)
Closest Earth approach5.77 LD at 1101 UT on 22 Oct. 2017
Inside ten LD of Earth20 to 24 Oct. 2017
Data based onJPL SSD orbit solution #56 downloaded from JPL on 6 Aug. 2017 UTC (dated 6 April 2017 local)
based on 242 observations spanning 1999-2017
Optical observation  
    none recent
Notesprevious observation Sept.-Dec. 2007, observation Oct.-Dec. 2008, observation Dec. 2013, observation Nov.-March 2015, observation Dec.-Jan. 2016, and observation Nov.-Jan. 2017
Links  
1989 VB   -   approaching
Approximate diameter389 meters (H=19.7)
Closest Earth approach7.87 LD at 2001 UT on 29 Sept. 2017
Inside ten LD of Earth25 Sept. until 4 Oct. 2017
Data based onJPL SSD orbit solution #18 downloaded from JPL on 11 Aug. 2017 UTC
based on 60 observations spanning 1989-2017
Optical observation  
  • reported from 3 observing codes during 27.4974 days: Q62, W88, Y00
  • first observed at 0043 UT on 14 July 2017 by SONEAR
  • last observed at 1239 UT on 10 Aug. 2017 by Sergio Foglia via iTelescope Obs. Siding Spring
Notesprevious observation Oct.-Jan. 2013 and observation April 2014
Links  

Footnotes

Illustration of ten lunar distances.

1. Ten lunar distances:  A "lunar distance" (LD) is the average distance between Earth and Moon (about 384,400 km., the same as 238,855 miles or nearly ten [9.59] times around Earth's equator). Ten lunar distances has no special astronomical importance but is a useful arbitrary "bubble" within which to organize this reporting. An approach by a small Solar-System body starts to become interesting at less than four LD out from Earth as it encounters our planet's "Hill sphere" (distance indicated by the blue line in this illustration at about 3.9 LD). This is a region within which Earth's gravitational influence can change the orbits of passing objects. The Moon also has a Hill sphere, outlined here as a gray circle. (Earth and Moon are not shown to scale.) 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 very 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.