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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1296525914492413 5.0175e-08  
a 2.422072832361854 1.2594e-08 au
q 2.108044812967336 1.2163e-07 au
i 6.940804271678045 4.8793e-06 deg
node 49.40947771130431 4.7279e-05 deg
peri 234.2147293625441 5.1621e-05 deg
M 204.0449357555576 2.0814e-05 deg
tp 2459992.952970130642
(2023-Feb-17.45297013)
7.9438e-05 TDB
period 1376.826525559159
3.77
1.0738e-05
2.94e-08
d
yr
n .2614708485905995 2.0393e-09 deg/d
Q 2.736100851756372 1.4226e-08 au
  Orbit Determination Parameters
   # obs. used (total)      604  
   data-arc span      8508 days (23.29 yr)  
   first obs. used      1997-10-31  
   last obs. used      2021-02-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56266  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 14:42:46  

Additional Information
 Earth MOID = 1.10039 au 
 Jupiter MOID = 2.39523 au 
 T_jup = 3.491 
[ 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 15.83   n/a MPCxxxxx  

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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