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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06182103999400793 5.8245e-08  
a 3.148814417228614 4.0313e-08 au
q 2.954151435207415 1.8564e-07 au
i 2.336426242252312 5.7369e-06 deg
node 289.7833229668184 0.00015655 deg
peri 275.2125207165444 0.0001642 deg
M 153.942211090441 5.1104e-05 deg
tp 2457727.781375936663
(2016-Dec-05.28137594)
0.0002839 TDB
period 2040.887307239088
5.59
3.9193e-05
1.073e-07
d
yr
n .1763938649248635 3.3875e-09 deg/d
Q 3.343477399249813 4.2805e-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 = 1.95134 au 
 Jupiter MOID = 1.63525 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 16.0   n/a MPO454848  
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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