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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .246270065424908 2.7129e-08  
a 2.307758471352586 7.2919e-09 au
q 1.739426641627698 6.2402e-08 au
i 23.76587463152152 4.5425e-06 deg
node 88.45510952540675 8.1269e-06 deg
peri 59.98976739376907 1.2448e-05 deg
M 79.83584325393562 9.3432e-06 deg
tp 2459112.525480277498
(2020-Sep-20.02548028)
3.256e-05 TDB
period 1280.512899136455
3.51
6.0691e-06
1.662e-08
d
yr
n .2811373475759398 1.3325e-09 deg/d
Q 2.876090301077472 9.0876e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1702  
   data-arc span      8294 days (22.71 yr)  
   first obs. used      1998-11-19  
   last obs. used      2021-08-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4836  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 18:10:30  

Additional Information
 Earth MOID = .846216 au 
 Jupiter MOID = 2.46368 au 
 T_jup = 3.436 
[ 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 14.67   n/a MPO637176  
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

Alternate Designations
 1998 WF31 = 2000 KB5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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