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120754 (1997 WL31)
Classification: Main-belt Asteroid          SPK-ID: 2120754
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2419409730394474 5.5106e-08  
a 2.398914010901261 9.3558e-09 au
q 1.818518420865846 1.3609e-07 au
i 2.090897602109723 6.8297e-06 deg
node 160.983885228008 0.00010198 deg
peri 229.5008500439339 0.00010327 deg
M 90.85966161011926 1.4941e-05 deg
tp 2458857.977533610547
(2020-Jan-09.47753361)
5.5446e-05 TDB
period 1357.126867028416
3.72
7.9392e-06
2.174e-08
d
yr
n .2652662833123783 1.5518e-09 deg/d
Q 2.979309600936676 1.1619e-08 au
  Orbit Determination Parameters
   # obs. used (total)      481  
   data-arc span      8459 days (23.16 yr)  
   first obs. used      1997-11-20  
   last obs. used      2021-01-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53197  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 09:25:50  

Additional Information
 Earth MOID = .823601 au 
 Jupiter MOID = 2.46579 au 
 T_jup = 3.486 
[ 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 16.4   n/a MPO502802  

120754 (1997 WL31)          Discovered 1997-Nov-29 by LINEAR at Socorro
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 1997 WL31 = 2001 XV190 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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