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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2465715907182847 3.7598e-08  
a 2.307581219127157 8.7169e-09 au
q 1.738597247215335 8.8127e-08 au
i 23.76685282184475 5.2272e-06 deg
node 88.45714981454495 9.9219e-06 deg
peri 60.06402811254892 1.4303e-05 deg
M 215.9962789416977 9.5719e-06 deg
tp 2459112.659383507876
(2020-Sep-20.15938351)
3.5341e-05 TDB
period 1280.365373254398
3.51
7.2549e-06
1.986e-08
d
yr
n .2811697407006266 1.5932e-09 deg/d
Q 2.876565191038978 1.0866e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1147  
   data-arc span      7652 days (20.95 yr)  
   first obs. used      1998-11-19  
   last obs. used      2019-11-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51372  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 10:14:41  

Additional Information
 Earth MOID = .845535 au 
 Jupiter MOID = 2.46505 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 14.5   n/a MPO417415  
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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