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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2027858401094154 3.9151e-08  
a 2.331322952095696 9.4936e-09 au
q 1.858563668688607 9.4402e-08 au
i 1.755113192549024 6.1302e-06 deg
node 346.4342666945068 0.00012517 deg
peri 86.78316365207783 0.00012682 deg
M 53.84052429661627 2.2782e-05 deg
tp 2459006.049588952752
(2020-Jun-05.54958895)
8.141e-05 TDB
period 1300.175822793923
3.56
7.9418e-06
2.174e-08
d
yr
n .2768856286116771 1.6913e-09 deg/d
Q 2.804082235502784 1.1419e-08 au
  Orbit Determination Parameters
   # obs. used (total)      509  
   data-arc span      9077 days (24.85 yr)  
   first obs. used      1996-02-14  
   last obs. used      2020-12-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5379  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 09:26:18  

Additional Information
 Earth MOID = .873905 au 
 Jupiter MOID = 2.47442 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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