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91862 (1999 US20)
Classification: Main-belt Asteroid          SPK-ID: 2091862
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .135371924659077 4.9291e-08  
a 3.000261103360478 2.1199e-08 au
q 2.594109983318805 1.506e-07 au
i 2.131479388885259 5.4357e-06 deg
node 95.02920194588739 0.00012858 deg
peri 333.0244945057204 0.00012988 deg
M 307.483799583263 1.7663e-05 deg
tp 2459277.403089052219
(2021-Mar-03.90308905)
9.392e-05 TDB
period 1898.178300557879
5.20
2.0118e-05
5.508e-08
d
yr
n .1896555238747567 2.0101e-09 deg/d
Q 3.406412223402152 2.4069e-08 au
  Orbit Determination Parameters
   # obs. used (total)      457  
   data-arc span      8959 days (24.53 yr)  
   first obs. used      1994-10-31  
   last obs. used      2019-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52854  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 06:04:49  

Additional Information
 Earth MOID = 1.60842 au 
 Jupiter MOID = 1.87765 au 
 T_jup = 3.238 
[ 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 15.6   n/a MPO412708  

91862 (1999 US20)          Discovered 1999-Oct-31 by Spacewatch at Kitt Peak
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 US20 = 2001 CE10 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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