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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2418305628861456 5.6724e-08  
a 2.398760049627142 9.5681e-09 au
q 1.818666556597012 1.4021e-07 au
i 2.090739126702283 6.841e-06 deg
node 160.9881954110218 0.00010443 deg
peri 229.495483301133 0.0001057 deg
M 37.81734083558949 1.4814e-05 deg
tp 2458857.950031829490
(2020-Jan-09.45003183)
5.5492e-05 TDB
period 1356.996219392796
3.72
8.1191e-06
2.223e-08
d
yr
n .2652918223759579 1.5873e-09 deg/d
Q 2.978853542657272 1.1882e-08 au
  Orbit Determination Parameters
   # obs. used (total)      466  
   data-arc span      8081 days (22.12 yr)  
   first obs. used      1997-11-20  
   last obs. used      2020-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52883  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 17:04:39  

Additional Information
 Earth MOID = .824927 au 
 Jupiter MOID = 2.46509 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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