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85803 (1998 WS4)
Classification: Main-belt Asteroid          SPK-ID: 2085803
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3166304474259342 4.0975e-08  
a 2.607158940487709 1.284e-08 au
q 1.781653038650561 1.096e-07 au
i 25.67689413164794 7.0542e-06 deg
node 212.3337530620996 1.1359e-05 deg
peri 260.5908237503121 1.7186e-05 deg
M 286.8281544868499 9.1436e-06 deg
tp 2458913.029629254438
(2020-Mar-04.52962925)
3.9118e-05 TDB
period 1537.622370224048
4.21
1.1359e-05
3.11e-08
d
yr
n .2341277071479808 1.7296e-09 deg/d
Q 3.432664842324857 1.6906e-08 au
  Orbit Determination Parameters
   # obs. used (total)      614  
   data-arc span      15274 days (41.82 yr)  
   first obs. used      1978-01-06  
   last obs. used      2019-11-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52127  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 10:14:41  

Additional Information
 Earth MOID = .969885 au 
 Jupiter MOID = 2.44321 au 
 T_jup = 3.206 
[ 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 14.9   n/a MPO366217  
diameter diameter 5.183 km 0.189 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.072   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85803 (1998 WS4)          Discovered 1998-Nov-18 by CSS at Catalina
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 1998 WS4 = 1981 US21 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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