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JPL Small-Body Database Browser
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108218 (2001 HR31)
Classification: Main-belt Asteroid          SPK-ID: 2108218
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2543372945030211 3.654e-08  
a 2.309229500528621 1.0029e-08 au
q 1.721906316977609 8.207e-08 au
i 11.06537723933281 5.0483e-06 deg
node 92.53978389240955 2.8161e-05 deg
peri 201.7693489487131 3.0763e-05 deg
M 118.5476174164097 1.3125e-05 deg
tp 2458578.425221237083
(2019-Apr-04.92522124)
4.5984e-05 TDB
period 1281.737445814049
3.51
8.3496e-06
2.286e-08
d
yr
n .2808687544985932 1.8297e-09 deg/d
Q 2.896552684079634 1.2579e-08 au
  Orbit Determination Parameters
   # obs. used (total)      561  
   data-arc span      6791 days (18.59 yr)  
   first obs. used      2001-04-26  
   last obs. used      2019-11-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54841  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 10:08:12  

Additional Information
 Earth MOID = .7107 au 
 Jupiter MOID = 2.31398 au 
 T_jup = 3.518 
[ 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 16.1   n/a MPO436519  

108218 (2001 HR31)          Discovered 2001-Apr-26 by Yeung, W. K. Y. at Desert Beaver
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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