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233738 (2008 SN257)
Classification: Main-belt Asteroid          SPK-ID: 2233738
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09404012515290613 6.7446e-08  
a 2.809465519284498 2.4505e-08 au
q 2.545263030238209 1.9278e-07 au
i 4.663461444926571 6.4987e-06 deg
node 51.33507370542794 7.8636e-05 deg
peri 4.889843749806196 8.7869e-05 deg
M 141.4542715514114 4.0993e-05 deg
tp 2458324.654304369413
(2018-Jul-25.15430437)
0.00019123 TDB
period 1720.021938952778
4.71
2.2504e-05
6.161e-08
d
yr
n .209299655921356 2.7384e-09 deg/d
Q 3.073668008330786 2.681e-08 au
  Orbit Determination Parameters
   # obs. used (total)      241  
   data-arc span      9280 days (25.41 yr)  
   first obs. used      1994-11-29  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58714  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 11:13:18  

Additional Information
 Earth MOID = 1.55699 au 
 Jupiter MOID = 2.22671 au 
 T_jup = 3.310 
[ 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 16.2   n/a MPO454690  

233738 (2008 SN257)          Discovered 2008-Sep-22 by Spacewatch at Kitt Peak
Reference: 20100228/Numbers.arcLast Updated: 2010-03-03

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