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90957 (1997 WS4)
Classification: Main-belt Asteroid          SPK-ID: 2090957
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1299217868688487 5.0524e-08  
a 2.421291488341737 1.2969e-08 au
q 2.106712971646045 1.2279e-07 au
i 6.942179660335591 4.948e-06 deg
node 49.41705715274045 4.9007e-05 deg
peri 234.0966031019473 5.3767e-05 deg
M 100.6030923057322 2.1809e-05 deg
tp 2458615.927815465583
(2019-May-12.42781547)
8.3942e-05 TDB
period 1376.160347155668
3.77
1.1057e-05
3.027e-08
d
yr
n .2615974226724888 2.1018e-09 deg/d
Q 2.73587000503743 1.4654e-08 au
  Orbit Determination Parameters
   # obs. used (total)      564  
   data-arc span      8037 days (22.00 yr)  
   first obs. used      1997-10-31  
   last obs. used      2019-11-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56596  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 08:46:00  

Additional Information
 Earth MOID = 1.09925 au 
 Jupiter MOID = 2.39735 au 
 T_jup = 3.492 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.8   n/a MPO296748  

90957 (1997 WS4)          Discovered 1997-Nov-20 by Spacewatch at Kitt Peak
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

Alternate Designations
 1997 WS4 = 2001 VT112 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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