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85311 (1994 WK8)
Classification: Main-belt Asteroid          SPK-ID: 2085311
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09480441349393666 3.8577e-08  
a 2.764604930208056 1.585e-08 au
q 2.502508181257236 1.0698e-07 au
i 8.19534169418213 4.1264e-06 deg
node 117.1310266252945 3.3179e-05 deg
peri 48.43145931551791 4.1279e-05 deg
M 106.8109329113582 2.3939e-05 deg
tp 2458502.348718735291
(2019-Jan-18.84871874)
0.00011139 TDB
period 1678.989747277313
4.60
1.4439e-05
3.953e-08
d
yr
n .2144146505860348 1.844e-09 deg/d
Q 3.026701679158877 1.7353e-08 au
  Orbit Determination Parameters
   # obs. used (total)      772  
   data-arc span      10420 days (28.53 yr)  
   first obs. used      1991-01-13  
   last obs. used      2019-07-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55286  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 15:35:19  

Additional Information
 Earth MOID = 1.51957 au 
 Jupiter MOID = 1.97966 au 
 T_jup = 3.319 
[ 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 15.0   n/a MPO432397  
diameter diameter 3.734 km 0.178 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.139   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85311 (1994 WK8)          Discovered 1994-Nov-28 by Spacewatch at Kitt Peak
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 1994 WK8 = 2001 KJ55 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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