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120931 (1998 SU123)
Classification: Main-belt Asteroid          SPK-ID: 2120931
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1721763501893802 4.471e-08  
a 2.166892500910604 7.322e-09 au
q 1.793804858851078 9.9005e-08 au
i 3.786992714852456 4.9289e-06 deg
node 20.22091751232536 5.0424e-05 deg
peri 349.7040733341402 5.1542e-05 deg
M 289.1364007165902 1.0144e-05 deg
tp 2459229.837557634862
(2021-Jan-15.33755763)
3.3204e-05 TDB
period 1165.076591979985
3.19
5.9052e-06
1.617e-08
d
yr
n .3089925610711992 1.5661e-09 deg/d
Q 2.539980142970131 8.5827e-09 au
  Orbit Determination Parameters
   # obs. used (total)      662  
   data-arc span      7985 days (21.86 yr)  
   first obs. used      1998-09-18  
   last obs. used      2020-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57662  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 10:11:41  

Additional Information
 Earth MOID = .793544 au 
 Jupiter MOID = 2.92232 au 
 T_jup = 3.670 
[ 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 MPO469254  

120931 (1998 SU123)          Discovered 1998-Sep-26 by LINEAR at Socorro
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 1998 SU123 = 2000 HF100 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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