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129629 (1998 HW31)
Classification: Inner Main-belt Asteroid          SPK-ID: 2129629
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07361868357867232 4.9692e-08  
a 1.916853037736479 7.1363e-09 au
q 1.77573684048454 9.7957e-08 au
i 21.07978683633372 5.8869e-06 deg
node 44.5124682280056 1.2586e-05 deg
peri 130.2178415328922 4.5453e-05 deg
M 154.2684946358678 4.0249e-05 deg
tp 2458585.109658817592
(2019-Apr-11.60965882)
0.00010892 TDB
period 969.352317714898
2.65
5.4132e-06
1.482e-08
d
yr
n .3713819974647048 2.0739e-09 deg/d
Q 2.057969234988417 7.6616e-09 au
  Orbit Determination Parameters
   # obs. used (total)      505  
   data-arc span      8139 days (22.28 yr)  
   first obs. used      1998-04-22  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5949  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 10:41:13  

Additional Information
 Earth MOID = .802163 au 
 Jupiter MOID = 2.94124 au 
 T_jup = 3.844 
[ 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 16.7   n/a MPO371986  

129629 (1998 HW31)          Discovered 1998-Apr-22 by LINEAR at Socorro
Reference: 20060711/Numbers.arcLast Updated: 2006-07-17
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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