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215350 (2001 WJ31)
Classification: Main-belt Asteroid          SPK-ID: 2215350
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2048830705845493 4.3421e-08  
a 2.761782105571203 1.6534e-08 au
q 2.195939707496313 1.1879e-07 au
i 7.332881311080284 5.5188e-06 deg
node 204.4988704546434 3.7066e-05 deg
peri 103.9667063935003 3.9595e-05 deg
M 98.23861609354857 1.3898e-05 deg
tp 2458543.030358300902
(2019-Feb-28.53035830)
6.2905e-05 TDB
period 1676.418882518142
4.59
1.5054e-05
4.122e-08
d
yr
n .2147434652246612 1.9284e-09 deg/d
Q 3.327624503646093 1.9922e-08 au
  Orbit Determination Parameters
   # obs. used (total)      440  
   data-arc span      7547 days (20.66 yr)  
   first obs. used      1999-03-20  
   last obs. used      2019-11-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55136  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 15:10:47  

Additional Information
 Earth MOID = 1.19577 au 
 Jupiter MOID = 2.01309 au 
 T_jup = 3.299 
[ 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 15.9   n/a MPO450015  
diameter diameter 4.267 km 0.136 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.046   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

215350 (2001 WJ31)          Discovered 2001-Nov-17 by LINEAR at Socorro
Reference: 20090607/Numbers.arcLast Updated: 2009-06-08

Alternate Designations
 2001 WJ31 = 2005 QM79 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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