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Legend - object IDs plus links to more info

Data compiled at 1418 UTC on 24 July 2016 for fifteen known objects during a period of seven days from 21 to 27 July 2016. 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
LG2016 LG62.28 LD  departed
NC12016 NC110.74 LD  departed
ND392016 ND3914.00 LD  departed
NE392016 NE396.65 LD+/- 4 minutesinbound
NJ2013 NJ88.5 LD  distant
NJ222016 NJ2220.90 LD  departed intruder
NK222016 NK2214.78 LD  departed intruder
NL222016 NL2234.05 LD  departed
NL392016 NL3914.22 LD+/- 2 minutes  departed
NM152016 NM1512.26 LD+/- one minute  departed
NN152016 NN1522.97 LD  departed
NS2016 NS8.70 LDoutbound
OA2016 OA11.45 LD  departed
OF2016 OF19.7 LD+/- 9 minutes  departed
OH32005 OH37.7 LD+/- 2.334 daysinbound
DateTfc.Time
21 July '16Rept. Line
22 July '16Rept. Line
23 July '16Rept. Line
24 July '16Rept. Line
25 July '16Rept. Line
26 July '16 Line
27 July '16 Line

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

2016 OF   -     departed
Approximate diameter79 meters (H=23.165)
Closest Earth approach8.95 LD at 0847 UT on 12 July 2016 - Note: JPL reports an approach uncertainty of +/- 9 minutes
Inside ten LD of Earth10 to 14 July 2016
Data based onJPL SSD orbit solution #1 downloaded from JPL on 24 July 2016 UTC
based on 22 observations spanning one day
Optical observation  
  • reported from 8 observing codes during 1.4407 days: 300, 595, B49, F51, H21, H36, J95, L04
  • designation assigned to Pan-STARRS 1 observation at 0955 UT 22 July 2016
  • last observed at 2029 UT on 23 July 2016 by Paus Obs.
Links  
2016 OA   -     departed
Approximate diameter28 meters (H=25.417)
Closest Earth approach4.51 LD at 0814 UT on 18 July 2016
Inside ten LD of Earth16 to 20 July 2016
Data based onJPL SSD orbit solution #2 downloaded from JPL on 18 July 2016 UTC
based on 45 observations spanning 2 days
Optical observation  
  • reported from 7 observing codes during 1.7212 days: 104, 204, 470, G40, G96, H21, J95
  • designation assigned to Mt. Lemmon Survey observation at 0657 UT 16 July 2016
  • last observed at 0015 UT on 18 July 2016 by Great Shefford Obs.
Links  
2016 NL39   -     departed
Approximate diameter11 meters (H=27.398)
Closest Earth approach3.61 LD at 2127 UT on 6 July 2016 - Note: JPL reports an approach uncertainty of +/- 2 minutes
Inside ten LD of Earth27 June until 16 July 2016
Data based onJPL SSD orbit solution #2 downloaded from JPL on 18 July 2016 UTC
based on 26 observations spanning 4 days
Optical observation  
  • reported from 3 observing codes during 3.7756 days: F51, G96, H21
  • first observed at 1106 UT on 13 July 2016 by Pan-STARRS 1
  • designation assigned to Mt. Lemmon Survey observation at 0753 UT 15 July 2016
  • last observed at 0543 UT on 17 July 2016 by ARO Westfield
Notesrisk, NHATS target
Links  
2016 NE39   -   inbound
Approximate diameter70 meters (H=23.422)
Closest Earth approach6.65 LD at 1224 UT on 26 July 2016 - Note: JPL reports an approach uncertainty of +/- 4 minutes
Inside ten LD of Earth24 to 28 July 2016
Data based onJPL SSD orbit solution #2 downloaded from JPL on 24 July 2016 UTC (dated 17 July 2016 local)
based on 33 observations spanning 6 days
Optical observation  
  • reported from 7 observing codes during 5.9595 days: 691, 703, 954, E23, G96, H21, I52
  • first observed at 0843 UT on 10 July 2016 by the Spacewatch 0.9m telescope
  • designation assigned to Catalina Sky Survey observation at 0841 UT 14 July 2016
  • last observed at 0745 UT on 16 July 2016 by Steward Obs. Mt. Lemmon Station
Links  
2016 ND39   -     departed
Approximate diameter30 meters (H=25.24)
Closest Earth approach4.86 LD at 1645 UT on 16 July 2016
Inside ten LD of Earth13 to 19 July 2016
Data based onJPL SSD orbit solution #2 downloaded from JPL on 24 July 2016 UTC (dated 19 July 2016 local)
based on 53 observations spanning 3 days
Optical observation  
  • reported from 8 observing codes during 2.7615 days: 204, 703, E23, G96, H21, H36, J22, J95
  • designation assigned to Catalina Sky Survey observation at 0748 UT 14 July 2016
  • last observed at 0205 UT on 17 July 2016 by Schiaparelli Obs.
Links  
2016 NL22   -     departed
Approximate diameter39 meters (H=24.667)
Closest Earth approach8.47 LD at 0013 UT on 7 July 2016
Inside ten LD of Earth4 to 9 July 2016
Data based onJPL SSD orbit solution #4 downloaded from JPL on 14 July 2016 UTC
based on 32 observations spanning 4 days
Optical observation  
  • reported from 8 observing codes during 3.9916 days: 104, 204, 246, 595, 703, G96, H21, I52
  • designation assigned to Catalina Sky Survey observation at 0604 UT 9 July 2016
  • last observed at 0552 UT on 13 July 2016 by ARO Westfield
Links  
2016 NK22   -     departed intruder
Approximate diameter6 meters (H=28.942)
Closest Earth approach0.69 LD at 1314 UT on 11 July 2016
Inside Earth-Moon system0211 on 11 July until 0018 UT on 12 July 2016
Inside Earth SOI10 to 13 July 2016
Inside ten LD of Earth5 to 17 July 2016
Closest Moon approach1.46 LD at 0601 UT on 11 July 2016
Data based onJPL SSD orbit solution #3 downloaded from JPL on 24 July 2016 UTC (dated 19 July 2016 local)
based on 27 observations spanning 2 days
Optical observation  
  • reported from 4 observing codes during 2.1367 days: 104, 461, G96, H21
  • first observed at 0347 UT on 9 July 2016 by the Mt. Lemmon Survey
  • designation assigned to Mt. Lemmon Survey observation at 0449 UT 9 July 2016
  • last observed at 0704 UT on 11 July 2016 by ARO Westfield
Notesrisk, NHATS target
Links  
2016 NJ22   -     departed intruder
Approximate diameter7 meters (H=28.374)
Closest Earth approach0.74 LD at 1013 UT on 7 July 2016
Inside Earth-Moon system2350 on 6 July until 2036 UT on 7 July 2016
Inside Earth SOI5 to 8 July 2016
Inside ten LD of Earth30 June until 13 July 2016
Closest Moon approach1.01 LD at 0248 UT on 7 July 2016
Data based onJPL SSD orbit solution #2 downloaded from JPL on 12 July 2016 UTC
based on 33 observations spanning 2 days
Optical observation  
  • reported from 6 observing codes during 2.0226 days: 204, 461, 474, G96, H21, I52
  • designation assigned to Mt. Lemmon Survey observation at 0457 UT 9 July 2016
  • last observed at 0529 UT on 11 July 2016 by ARO Westfield
NotesNHATS target
Links  
2016 NN15   -     departed
Approximate diameter15 meters (H=26.794)
Closest Earth approach4.32 LD at 0601 UT on 8 July 2016
Inside ten LD of Earth3 to 13 July 2016
Data based onJPL SSD orbit solution #3 downloaded from JPL on 24 July 2016 UTC (dated 19 July 2016 local)
based on 17 observations spanning 4 days
Optical observation  
  • reported from 4 observing codes during 4.1077 days: 204, G96, H21, K51
  • designation assigned to Mt. Lemmon Survey observation at 0418 UT 6 July 2016
  • last observed at 0653 UT on 10 July 2016 by ARO Westfield
Links  
2016 NM15   -     departed
Approximate diameter11 meters (H=27.521)
Closest Earth approach6.30 LD at 2139 UT on 6 July 2016
Inside ten LD of Earth25 June until 17 July 2016
Data based onJPL SSD orbit solution #2 downloaded from JPL on 10 July 2016 UTC
based on 34 observations spanning 2 days
Optical observation  
  • reported from 3 observing codes during 2.1544 days: 204, 474, G96
  • designation assigned to Mt. Lemmon Survey observation at 0605 UT 6 July 2016
  • last observed at 0947 UT on 8 July 2016 by Mt. John Obs.
NotesNHATS target
Links  
2016 NC1   -     departed
Approximate diameter27 meters (H=25.505)
Closest Earth approach7.28 LD at 0033 UT on 13 July 2016
Inside ten LD of Earth6 to 19 July 2016
Data based onJPL SSD orbit solution #3 downloaded from JPL on 10 July 2016 UTC
based on 80 observations spanning 4 days
Optical observation  
  • reported from 13 observing codes during 3.9813 days: 104, 204, 470, 474, 691, 705, 926, B04, F51, G45, G96, I52, T05
  • designation assigned to Mt. Lemmon Survey observation at 0842 UT 5 July 2016
  • last observed at 0815 UT on 9 July 2016 by Steward Obs. Mt. Lemmon Station
NotesNHATS target
Links  
2016 NS   -   outbound
Approximate diameter27 meters (H=25.487)
Closest Earth approach8.70 LD at 1741 UT on 20 July 2016
Inside ten LD of Earth16 to 25 July 2016
Data based onJPL SSD orbit solution #8 downloaded from JPL on 24 July 2016 UTC (dated 21 July 2016 local)
based on 67 observations spanning 12 days
Optical observation  
  • reported from 12 observing codes during 12.6881 days: 104, 204, 461, 474, 568, 705, A44, B18, G40, G45, G96, J04
  • designation assigned to Mt. Lemmon Survey observation at 0643 UT 4 July 2016
  • last observed at 2314 UT on 16 July 2016 by San Marcello Pistoiese Obs.
NotesNHATS target
Links  
2016 LG   -     departed
Approximate diameter29 meters (H=25.336)
Closest Earth approach2.94 LD at 1204 UT on 6 June 2016
Inside ten LD of Earth30 May until 13 June 2016
Data based onJPL SSD orbit solution #24 downloaded from JPL on 16 July 2016 UTC
based on 204 observations spanning 41 days
Optical observation  
  • reported from 20 observing codes during 41.1613 days: 089, 160, 204, 291, 300, 474, 691, 703, 705, 807, 926, A53, F51, G96, H21, H36, H45, I52, J04, L51
  • designation assigned to Catalina Sky Survey observation at 0509 UT 2 June 2016
  • last observed at 0902 UT on 13 July 2016 by the Spacewatch 1.8m telescope
NotesNHATS target
Links  
2013 NJ   -     distant
Approximate diameter141 meters (H=21.9)
Distance from Earth96.0 - 187.0 LD min-max during the observation period
Data based onJPL SSD orbit solution #68 downloaded from JPL on 14 July 2016 UTC
based on 236 observations spanning 2013-2016 including radar
Optical observation  
  • reported from 4 observing codes during 40.3776 days: 291, F51, G96, J04
  • first observed at 0408 UT on 3 June 2016 by ESA Optical Ground Station
  • last observed at 1311 UT on 13 July 2016 by Pan-STARRS 1
NotesNHATS target
previous passage Nov. 2013 at 2.47 LD and observation June-July 2016
Links  
2005 OH3   -   inbound
Approximate diameter21 meters (H=26.)
Closest Earth approach5.85 LD at 0712 UT on 3 Aug. 2016 - Note: JPL reports an approach uncertainty of +/- 2.334 days
Inside ten LD of Earth24 July until 13 Aug. 2016
Data based onJPL SSD orbit solution #9 downloaded from JPL on 4 July 2016 UTC (dated 13 June 2014 local)
based on 87 observations spanning 6 days
Optical observation  
    none recent
NotesNHATS target
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.