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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1718718483914638 4.1912e-08  
a 2.166255035812538 7.2012e-09 au
q 1.793936778720121 9.3377e-08 au
i 3.787364858040358 4.4632e-06 deg
node 20.20114526833443 4.9976e-05 deg
peri 349.7455478368693 5.1105e-05 deg
M 350.9070230305782 1.0187e-05 deg
tp 2459229.914833549909
(2021-Jan-15.41483355)
3.3e-05 TDB
period 1164.562509459502
3.19
5.8069e-06
1.59e-08
d
yr
n .3091289622289863 1.5414e-09 deg/d
Q 2.538573292904955 8.4389e-09 au
  Orbit Determination Parameters
   # obs. used (total)      698  
   data-arc span      8116 days (22.22 yr)  
   first obs. used      1998-09-18  
   last obs. used      2020-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56925  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 09:26:13  

Additional Information
 Earth MOID = .792174 au 
 Jupiter MOID = 2.92479 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 16.85   n/a E2021B55  

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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