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Legend - object IDs plus links to more info

Data compiled at 1659 UTC on 30 Aug. 2016 for six known objects during a period of seven days from 27 Aug. to 2 Sept. 2016. Orange is for objects with a new JPL orbit solution (usually from new observation).

Chart
ID

Full ID
Period
Closest
Passage
Uncertainty

Status
KE2015 KE15.4 LD  distant
PP272016 PP2758.50 LD  departed
QA22016 QA20.23 LDoutbound intruder
QB112016 QB113.45 LDinbound
QY12016 QY148.3 LD+/- 29 minutes  departed
UV1362012 UV13654.9 LD  distant
DateTfc.Time
27 Aug. '16Rept. Line
28 Aug. '16Rept. Line
29 Aug. '16Rept. Line
30 Aug. '16Rept. Line
31 Aug. '16Rept. Line
1 Sept. '16 Line
2 Sept. '16 Line

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

2016 QB11   -   inbound
Approximate diameter23 meters (H=25.799)
Closest Earth approach3.45 LD at 2056 UT on 31 Aug. 2016
Inside ten LD of Earth30 Aug. until 2 Sept. 2016
Data based onJPL SSD orbit solution #2 downloaded from JPL on 30 Aug. 2016 UTC
based on 24 observations spanning one day
Optical observation  
  • reported from 4 observing codes during 1.7032 days: 104, G96, H36, J95
  • designation assigned to Mt. Lemmon Survey observation at 0513 UT 28 Aug. 2016
  • last observed at 2206 UT on 29 Aug. 2016 by Great Shefford Obs.
Links  
2016 QA2   -   outbound intruder
Approximate diameter31 meters (H=25.177)
Closest Earth approach0.23 LD at 0125 UT on 28 Aug. 2016
Inside Earth-Moon system1458 on 27 Aug. until 1151 UT on 28 Aug. 2016
Inside Earth SOI26 to 29 Aug. 2016
Inside ten LD of Earth23 Aug. until 1 Sept. 2016
Closest Moon approach1.01 LD at 0240 UT on 28 Aug. 2016
Data based onJPL SSD orbit solution #4 downloaded from JPL on 30 Aug. 2016 UTC
based on 80 observations spanning 2 days
Optical observation  
  • reported from 9 observing codes during 2.5644 days: 104, B49, C47, E23, G34, J95, L04, Q62, Y00
  • designation assigned to SONEAR observation at 0612 UT 27 Aug. 2016
  • last observed at 1945 UT on 29 Aug. 2016 by San Marcello Pistoiese Obs.
Links  
2016 QY1   -     departed
Approximate diameter75 meters (H=23.283)
Closest Earth approach7.24 LD at 0329 UT on 10 Aug. 2016 - Note: JPL reports an approach uncertainty of +/- 29 minutes
Inside ten LD of Earth7 to 12 Aug. 2016
Data based onJPL SSD orbit solution #3 downloaded from JPL on 30 Aug. 2016 UTC
based on 53 observations spanning 3 days
Optical observation  
  • reported from 13 observing codes during 3.3475 days: 160, 204, 246, 291, 595, B49, C43, D29, E23, G96, J22, L04, Q64
  • designation assigned to Mt. Lemmon Survey observation at 0805 UT 26 Aug. 2016
  • last observed at 1625 UT on 29 Aug. 2016 by Purple Mtn. Obs. Xuyi Station
Links  
2016 PP27   -     departed
Approximate diameter64 meters (H=23.627)
Closest Earth approach9.92 LD at 0141 UT on 4 Aug. 2016
Inside ten LD of Earth3 to 4 Aug. 2016
Data based onJPL SSD orbit solution #5 downloaded from JPL on 30 Aug. 2016 UTC
based on 25 observations spanning 20 days
Optical observation  
  • reported from 5 observing codes during 19.6909 days: 807, 900, E23, F51, X13
  • designation assigned to Pan-STARRS 1 observation at 1110 UT 9 Aug. 2016
  • last observed at 0345 UT on 29 Aug. 2016 by Robert Holmes via Cerro Tololo Inter-American Obs.
Links  
2015 KE   -     distant
Approximate diameter18 meters (H=26.4)
Distance from Earth17.3 - 53.9 LD min-max during the observation period
Data based onJPL SSD orbit solution #18 downloaded from JPL on 26 Aug. 2016 UTC
based on 111 observations spanning 2015-2016
Optical observation  
  • reported from 6 observing codes during 52.6897 days: 204, 291, 568, 691, 705, F51
  • first observed at 1324 UT on 3 July 2016 by David Tholen's team on Mauna Kea
  • last observed at 0557 UT on 25 Aug. 2016 by the Spacewatch 1.8m telescope
NotesNHATS target
previous passage May 2015 at 1.60 LD
Links  
2012 UV136   -     distant
Approximate diameter27 meters (H=25.5)
Distance from Earth54.2 - 60.9 LD min-max during the observation period
Data based onJPL SSD orbit solution #30 downloaded from JPL on 27 Aug. 2016 UTC
based on 114 observations spanning 2012-2016
Optical observation  
  • reported from 2 observing codes during 26.9905 days: 291, H21
  • first observed at 0651 UT on 31 July 2016 by ARO Westfield
  • last observed at 0638 UT on 27 Aug. 2016 by the Spacewatch 1.8m telescope
NotesNHATS target
previous passage Nov. 2012 at 5.79 LD, observation Aug.-Oct. 2013, observation Sept. 2014, and observation Sept. 2015
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.