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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2302039637800176 4.015e-08  
a 2.224983597722618 1.0045e-08 au
q 1.712783554181348 9.2514e-08 au
i 3.490889258967249 5.4412e-06 deg
node 64.61959527711944 7.7643e-05 deg
peri 237.6843975882722 7.9133e-05 deg
M 267.3627941177357 1.9778e-05 deg
tp 2459312.440378064953
(2021-Apr-07.94037807)
6.7942e-05 TDB
period 1212.240104112241
3.32
8.209e-06
2.248e-08
d
yr
n .296970871347008 2.011e-09 deg/d
Q 2.737183641263889 1.2357e-08 au
  Orbit Determination Parameters
   # obs. used (total)      685  
   data-arc span      7773 days (21.28 yr)  
   first obs. used      1998-10-22  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52794  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 06:24:59  

Additional Information
 Earth MOID = .700572 au 
 Jupiter MOID = 2.50348 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 15.9   n/a MPO469254  

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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