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393971 (2005 US291)
Classification: Main-belt Asteroid          SPK-ID: 2393971
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1867236598994991 4.3023e-08  
a 2.199503820034124 2.1478e-08 au
q 1.788804416794423 9.7868e-08 au
i 4.192574666612883 7.3672e-06 deg
node 258.0891823613641 8.0328e-05 deg
peri 42.59925003080522 8.529e-05 deg
M 251.6995168076217 3.4335e-05 deg
tp 2459358.937468365172
(2021-May-24.43746837)
0.00011773 TDB
period 1191.476573398548
3.26
1.7452e-05
4.778e-08
d
yr
n .3021461000891877 4.4256e-09 deg/d
Q 2.610203223273825 2.5488e-08 au
  Orbit Determination Parameters
   # obs. used (total)      135  
   data-arc span      5202 days (14.24 yr)  
   first obs. used      2005-10-26  
   last obs. used      2020-01-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60051  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 04:53:28  

Additional Information
 Earth MOID = .775916 au 
 Jupiter MOID = 2.6046 au 
 T_jup = 3.640 
[ 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 17.8   n/a MPO460514  

393971 (2005 US291)          Discovered 2005-Oct-26 by Spacewatch at Kitt Peak
Reference: Last Updated: 2014-05-15

[ show close-approach data ]
Alternate Designations
 2005 US291 = 2008 QR31 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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