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120955 (1998 UO31)
Classification: Main-belt Asteroid          SPK-ID: 2120955
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2302912258195717 3.9538e-08  
a 2.224991554185467 9.8979e-09 au
q 1.712595521733902 9.1328e-08 au
i 3.490907869769223 4.924e-06 deg
node 64.61856332451069 7.7575e-05 deg
peri 237.6950611253172 7.8985e-05 deg
M 326.7568622844965 1.9898e-05 deg
tp 2459312.441335792661
(2021-Apr-07.94133579)		 6.7492e-05 TDB
period 1212.246606509822
3.32		 8.0891e-06
2.215e-08		 d
yr
n .2969692784180899 1.9816e-09 deg/d
Q 2.737387586637033 1.2177e-08 au
   Orbit Determination Parameters
   # obs. used (total)      766  
   data-arc span      7882 days (21.58 yr)  
   first obs. used      1998-10-22  
   last obs. used      2020-05-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52269  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 17:53:31  

Additional Information
 Earth MOID = .698411 au 
 Jupiter MOID = 2.50285 au 
 T_jup = 3.609 
[ 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 15.89   n/a E2021B55  

120955 (1998 UO31)          Discovered 1998-Oct-22 by BAO Schmidt CCD Asteroid Program at Xinglong
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

Alternate Designations
 1998 UO31 = 2001 OX57 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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