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JPL Small-Body Database Browser
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(2012 US18)
Classification: Apollo [NEO]          SPK-ID: 3612646
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | 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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3555195815556818 0.00076002  
a 1.194144831174816 0.00082924 au
q .7696029604786648 0.00037315 au
i 3.543896726779892 0.0093435 deg
node 205.5471367075889 0.00154 deg
peri 265.9102141092138 0.0010458 deg
M 311.6218114961072 1.817 deg
tp 2458664.551754916170
(2019-Jun-30.05175492)
2.4724 TDB
period 476.6328067030801
1.30
0.49648
0.001359
d
yr
n .7552984077830445 0.00078675 deg/d
Q 1.618686701870966 0.0011241 au
  Orbit Determination Parameters
   # obs. used (total)      25  
   data-arc span      3 days  
   first obs. used      2012-10-18  
   last obs. used      2012-10-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      7  
   norm. resid. RMS      .39201  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-06 08:48:26  

Additional Information
 Earth MOID = .00390677 au 
 Jupiter MOID = 3.50475 au 
 T_jup = 5.251 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 28.6   n/a MPO240175  

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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