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266649 (2008 SG287)
Classification: Outer Main-belt Asteroid          SPK-ID: 2266649
[ 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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08687081916123725 5.2263e-08  
a 3.951368849745196 7.9148e-08 au
q 3.608110200959635 2.0447e-07 au
i 8.95708356473037 6.9786e-06 deg
node 339.7423479171253 3.6575e-05 deg
peri 108.8198699069247 5.5323e-05 deg
M 117.8227705270518 4.2785e-05 deg
tp 2458061.541247681432
(2017-Nov-04.04124768)		 0.00034057 TDB
period 2868.928894835949
7.85		 8.6199e-05
2.36e-07		 d
yr
n .1254823710158859 3.7702e-09 deg/d
Q 4.294627498530756 8.6024e-08 au
   Orbit Determination Parameters
   # obs. used (total)      291  
   data-arc span      6714 days (18.38 yr)  
   first obs. used      2001-12-09  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60797  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 15:25:01  

Additional Information
 Earth MOID = 2.63924 au 
 Jupiter MOID = .915912 au 
 T_jup = 3.032 
[ 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 14.2   n/a MPO433731  
diameter diameter 7.440 km 0.305 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
geometric albedo albedo 0.073   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  

266649 (2008 SG287)          Discovered 2008-Sep-23 by Spacewatch at Kitt Peak
Reference: 20110218/Numbers.arcLast Updated: 2011-02-22

[ show close-approach data ]
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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