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85814 (1998 WF31)
Classification: Main-belt Asteroid          SPK-ID: 2085814
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2464505520758559 3.3871e-08  
a 2.308118027156948 8.6409e-09 au
q 1.739281065107883 8.0137e-08 au
i 23.76656878371186 4.7193e-06 deg
node 88.45754152356707 9.4697e-06 deg
peri 60.00390746891661 1.3229e-05 deg
M 328.4985469603671 9.5102e-06 deg
tp 2459112.576234736052
(2020-Sep-20.07623474)
3.4171e-05 TDB
period 1280.812172512055
3.51
7.1924e-06
1.969e-08
d
yr
n .2810716572859644 1.5784e-09 deg/d
Q 2.876954989206013 1.077e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1301  
   data-arc span      7747 days (21.21 yr)  
   first obs. used      1998-11-19  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49964  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 20:39:14  

Additional Information
 Earth MOID = .845738 au 
 Jupiter MOID = 2.46326 au 
 T_jup = 3.436 
[ 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 14.6   n/a MPO502667  
diameter diameter 3.000 km 0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.284   0.050 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85814 (1998 WF31)          Discovered 1998-Nov-19 by CSS at Catalina
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 1998 WF31 = 2000 KB5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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