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Legend - object IDs plus links to more info

Data compiled at 2347 UTC on 30 July 2014 for nine known objects during a period of seven days from 27 July to 2 Aug. 2014. 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
AB22007 AB2186.0 LDdistant observation
MA682014 MA6863.3 LD+/- 1.451 daysdeparted
MB552014 MB5587.81 LD+/- one minutedeparted
OM2072014 OM2073.30 LDoutbound intruder
OP22014 OP26.87 LDdeparted intruder
OW32014 OW39.60 LDdeparted
OX32014 OX314.92 LDdeparted
PU12011 PU113.82 LDdeparted
RZ532013 RZ5310.7 LD+/- 20 minutesapproaching
DateTfc.Time
27 July '14Rept. Line
28 July '14Rept. Line
29 July '14Rept. Line
30 July '14Rept. Line
31 July '14Rept. Line
1 Aug. '14 Line
2 Aug. '14 Line

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

2014 OM207   -   outbound intruder
Approximate diameter5 meters (H=28.989)
Closest Earth approach0.70 LD at 0638 UT on 25 July 2014
Inside Earth-Moon system2133 on 24 July until 1544 UT on 25 July 2014
Inside Earth SOI24 to 26 July 2014
Inside ten LD of Earth19 to 30 July 2014
Closest Moon approach1.74 LD at 0618 UT on 25 July 2014
Data based onJPL SSD orbit solution #1 downloaded from JPL on 30 July 2014 UTC
based on 6 observations spanning 3 days
Optical observation  
  • reported from 3 observing codes during 2.9542 days: 568, F51, J04
  • designation assigned to Pan-STARRS 1 observation at 1403 UT 26 July 2014
  • last observed at 1257 UT on 29 July 2014 by Marco Micheli via Mauna Kea
Notesrisk
Links  
2014 OX3   -   departed
Approximate diameter10 meters (H=27.734)
Closest Earth approach2.25 LD at 1940 UT on 21 July 2014
Inside Earth SOI21 to 22 July 2014
Inside ten LD of Earth18 to 25 July 2014
Closest Moon approach3.21 LD at 1824 UT on 21 July 2014
Data based onJPL SSD orbit solution #2 downloaded from JPL on 29 July 2014 UTC
based on 12 observations spanning 4 days
Optical observation  
  • reported from 4 observing codes during 3.9604 days: 291, 568, F51, J04
  • designation assigned to Pan-STARRS 1 observation at 1024 UT 25 July 2014
  • last observed at 0927 UT on 29 July 2014 by the Spacewatch 1.8m telescope
Notesrisk
Links  
2014 OW3   -   departed
Approximate diameter106 meters (H=22.52)
Closest Earth approach9.60 LD at 0751 UT on 29 July 2014
Inside ten LD of Earth28 to 29 July 2014
Data based onJPL SSD orbit solution #2 downloaded from JPL on 28 July 2014 UTC
based on 20 observations spanning 2 days
Optical observation  
  • reported from 6 observing codes during 2.2475 days: 194, 568, 900, E23, F51, Q62
  • designation assigned to Pan-STARRS 1 observation at 0834 UT 25 July 2014
  • last observed at 1431 UT on 27 July 2014 by Moriyama Obs.
Links  
2014 OP2   -   departed intruder
Approximate diameter5 meters (H=29.005)
Closest Earth approach0.52 LD at 0834 UT on 24 July 2014
Inside Earth-Moon system0041-1627 UT on 24 July 2014
Inside Earth SOI23 to 25 July 2014
Inside ten LD of Earth20 to 28 July 2014
Closest Moon approach1.44 LD at 0459 UT on 24 July 2014
Data based onJPL SSD orbit solution #3 downloaded from JPL on 29 July 2014 UTC
based on 22 observations spanning 3 days
Optical observation  
  • reported from 3 observing codes during 3.0257 days: 568, F51, J04
  • designation assigned to ESA Optical Ground Station observation at 0217 UT 25 July 2014
  • last observed at 0254 UT on 28 July 2014 by ESA Optical Ground Station
Notesrisk
Links  
2014 MA68   -   departed
Approximate diameter22 meters (H=25.911)
Closest Earth approach4.13 LD at 0754 UT on 13 June 2014 - Note: JPL reports an approach uncertainty of +/- 1.451 days
Inside ten LD of Earth6 to 20 June 2014
Data based onJPL SSD orbit solution #1 downloaded from JPL on 30 July 2014 UTC
based on 6 observations spanning one day
Optical observation  
  • reported from 2 observing codes during 22.874 hours: 568, F51
  • designation assigned to Pan-STARRS 1 observation at 1328 UT 27 June 2014
  • last observed at 1220 UT on 28 June 2014 by Marco Micheli via Mauna Kea
Notesrisk
Links  
2014 MB55   -   departed
Approximate diameter38 meters (H=24.758)
Closest Earth approach9.25 LD at 1459 UT on 13 June 2014
Inside ten LD of Earth11 to 15 June 2014
Data based onJPL SSD orbit solution #4 downloaded from JPL on 28 July 2014 UTC
based on 16 observations spanning 26 days
Optical observation  
  • reported from 3 observing codes during 25.9800 days: 474, 568, F51
  • designation assigned to Pan-STARRS 1 observation at 1236 UT 29 June 2014
  • last observed at 1207 UT on 25 July 2014 by David Tholen's team on Mauna Kea
Links  
2013 RZ53   -   approaching
Approximate diameter2 meters (H=31.1)
Closest Earth approach1.90 LD at 0403 UT on 9 Sept. 2014 - Note: JPL reports an approach uncertainty of +/- 20 minutes
Inside Earth SOI4 to 13 Sept. 2014
Inside ten LD of Earth5 Aug. until 12 Oct. 2014
Closest Moon approach2.26 LD at 0407 UT on 5 Sept. 2014
Data based onJPL SSD orbit solution #6 downloaded from JPL on 21 July 2014 UTC (dated 13 June 2014 local)
based on 31 observations spanning 3 days
Optical observation  
    none recent
Notesrisk
previous passage Sept. 2013 at 0.63 LD
Links  
2011 PU1   -   departed
Approximate diameter34 meters (H=25.)
Closest Earth approach8.51 LD at 0234 UT on 17 July 2014
Inside ten LD of Earth12 to 21 July 2014
Data based onJPL SSD orbit solution #21 downloaded from JPL on 30 July 2014 UTC
based on 82 observations spanning 2011-2014
Optical observation  
  • reported from 2 observing codes during 112.3642 days: 291, 568
  • first observed at 0604 UT on 4 April 2014 by David Tholen's team on Mauna Kea
  • last observed at 1449 UT on 25 July 2014 by David Tholen's team on Mauna Kea
Notesradar target, potential mission destination
previous passage July 2011 at 0.87 LD
Links  
2007 AB2   -   distant observation
Approximate diameter295 meters (H=20.3)
Distance from Earth198.6 - 217.7 LD min-max during the observation period
Data based onJPL SSD orbit solution #42 downloaded from JPL on 30 July 2014 UTC
based on 441 observations spanning 2007-2014
Optical observation  
  • reported from 2 observing codes during 6.0491 days: F51, H36
  • first observed at 0805 UT on 23 July 2014 by Sandlot Obs.
  • last observed at 0916 UT on 29 July 2014 by Pan-STARRS 1
Notesprevious passage Dec. 2006 at 5.4 LD, observation Feb. 2010, and observation May 2013
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.