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JPL Small-Body Database Browser
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379991 (2012 US166)
Classification: Main-belt Asteroid          SPK-ID: 2379991
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03187238443669631 8.5844e-08  
a 3.081316534947161 4.9954e-08 au
q 2.983107629774176 2.7091e-07 au
i 7.627965009569651 8.1036e-06 deg
node 290.1487000212122 6.016e-05 deg
peri 220.3670551971587 0.00013077 deg
M 31.75367786171405 0.00011929 deg
tp 2458826.241315016223
(2019-Dec-08.74131502)
0.00065327 TDB
period 1975.617654980312
5.41
4.8043e-05
1.315e-07
d
yr
n .1822214936642625 4.4313e-09 deg/d
Q 3.179525440120146 5.1547e-08 au
  Orbit Determination Parameters
   # obs. used (total)      170  
   data-arc span      8075 days (22.11 yr)  
   first obs. used      1996-12-06  
   last obs. used      2019-01-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50526  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 14:58:34  

Additional Information
 Earth MOID = 1.99987 au 
 Jupiter MOID = 1.87641 au 
 T_jup = 3.213 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.9   n/a MPO471898  

379991 (2012 US166)          Discovered 1996-Dec-06 by Spacewatch at Kitt Peak
Reference: Last Updated: 2013-11-20

[ show close-approach data ]
Alternate Designations
 2012 US166 = 1996 XP8 = 2009 DT65 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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