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249341 (2008 WH4)
Classification: Main-belt Asteroid          SPK-ID: 2249341
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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06135886801516138 5.8233e-08  
a 3.15016798668505 4.0366e-08 au
q 2.956877244964456 1.8572e-07 au
i 2.336475164492484 5.7369e-06 deg
node 289.7769750559 0.0001565 deg
peri 275.1999704366026 0.00016427 deg
M 224.4901366480116 5.1999e-05 deg
tp 2459769.218625791636
(2022-Jul-08.71862579)
0.0003011 TDB
period 2042.20341191074
5.59
3.9253e-05
1.075e-07
d
yr
n .1762801873213865 3.3882e-09 deg/d
Q 3.343458728405645 4.2842e-08 au
  Orbit Determination Parameters
   # obs. used (total)      193  
   data-arc span      7588 days (20.77 yr)  
   first obs. used      1999-01-17  
   last obs. used      2019-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .63949  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 02:45:39  

Additional Information
 Earth MOID = 1.95382 au 
 Jupiter MOID = 1.63418 au 
 T_jup = 3.204 
[ 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 15.9   n/a MPO494359  
diameter diameter 4.165 km 0.927 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.037   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

249341 (2008 WH4)          Discovered 2008-Nov-17 by Spacewatch at Kitt Peak
Reference: 20100824/Numbers.arcLast Updated: 2010-08-27

[ show close-approach data ]
Alternate Designations
 2008 WH4 = 2005 GY216 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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