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JPL Small-Body Database Browser
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442684 (2012 US39)
Classification: Main-belt Asteroid          SPK-ID: 2442684
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1065012182550974 1.0524e-07  
a 2.973651632776432 4.9736e-08 au
q 2.656954111219482 3.131e-07 au
i 10.78696547210127 1.0899e-05 deg
node 19.19098072662483 3.6459e-05 deg
peri 29.79163308759448 6.4537e-05 deg
M 87.94657490595017 4.7103e-05 deg
tp 2458142.937957414422
(2018-Jan-24.43795741)
0.00024317 TDB
period 1872.981813185582
5.13
4.699e-05
1.287e-07
d
yr
n .1922068850138535 4.8221e-09 deg/d
Q 3.290349154333381 5.5033e-08 au
  Orbit Determination Parameters
   # obs. used (total)      114  
   data-arc span      4165 days (11.40 yr)  
   first obs. used      2007-10-09  
   last obs. used      2019-03-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61259  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 14:50:55  

Additional Information
 Earth MOID = 1.6712 au 
 Jupiter MOID = 2.16659 au 
 T_jup = 3.227 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.3   n/a MPO339474  

442684 (2012 US39)          Discovered 2007-Oct-09 by Spacewatch at Kitt Peak
Reference: Last Updated: 2015-09-02
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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