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120951 (1998 UA9)
Classification: Main-belt Asteroid          SPK-ID: 2120951
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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2026858928741435 4.1044e-08  
a 2.331117786939927 9.7552e-09 au
q 1.85863309689921 9.9239e-08 au
i 1.755065160943076 6.1536e-06 deg
node 346.4364226959773 0.00012656 deg
peri 86.79611071870353 0.00012823 deg
M 358.454842128325 2.316e-05 deg
tp 2459006.079754768729
(2020-Jun-05.57975477)
8.366e-05 TDB
period 1300.004196053331
3.56
8.1604e-06
2.234e-08
d
yr
n .2769221830921162 1.7383e-09 deg/d
Q 2.803602476980644 1.1732e-08 au
  Orbit Determination Parameters
   # obs. used (total)      479  
   data-arc span      8745 days (23.94 yr)  
   first obs. used      1996-02-14  
   last obs. used      2020-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54615  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 06:24:59  

Additional Information
 Earth MOID = .874465 au 
 Jupiter MOID = 2.47444 au 
 T_jup = 3.542 
[ 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 16.8   n/a MPO449702  

120951 (1998 UA9)          Discovered 1998-Oct-17 by Beijing Schmidt CCD Asteroid Program at Xinglong
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 1998 UA9 = 2003 DR16 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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