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109091 (2001 QA31)
Classification: Main-belt Asteroid          SPK-ID: 2109091
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3030540770192368 4.8058e-08  
a 3.103952680305162 2.2184e-08 au
q 2.163287165663895 1.5528e-07 au
i 14.97667309303607 6.5698e-06 deg
node 31.06466684334207 1.882e-05 deg
peri 315.8391056675378 2.0747e-05 deg
M 167.0985267641033 9.9951e-06 deg
tp 2458073.368824594213
(2017-Nov-15.86882459)
5.0454e-05 TDB
period 1997.427682993698
5.47
2.1414e-05
5.863e-08
d
yr
n .1802318066706878 1.9322e-09 deg/d
Q 4.044618194946429 2.8907e-08 au
  Orbit Determination Parameters
   # obs. used (total)      609  
   data-arc span      10778 days (29.51 yr)  
   first obs. used      1990-10-16  
   last obs. used      2020-04-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58025  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 19:00:50  

Additional Information
 Earth MOID = 1.18515 au 
 Jupiter MOID = 1.54656 au 
 T_jup = 3.098 
[ 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 14.3   n/a MPO432614  

109091 (2001 QA31)          Discovered 2001-Aug-16 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

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