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216885 (2008 SD268)
Classification: Main-belt Asteroid          SPK-ID: 2216885
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1126836809026092 5.7448e-08  
a 3.154749874984277 3.0824e-08 au
q 2.799261046744003 1.7684e-07 au
i 10.54402250985129 6.3291e-06 deg
node 198.9631107823023 2.5634e-05 deg
peri 140.363920777289 3.5025e-05 deg
M 97.99960406876191 2.2485e-05 deg
tp 2458643.355760048894
(2019-Jun-08.85576005)
0.00012812 TDB
period 2046.660578767909
5.60
2.9996e-05
8.212e-08
d
yr
n .1758962886834514 2.578e-09 deg/d
Q 3.510238703224552 3.4298e-08 au
  Orbit Determination Parameters
   # obs. used (total)      277  
   data-arc span      6789 days (18.59 yr)  
   first obs. used      2001-05-21  
   last obs. used      2019-12-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58805  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:56:39  

Additional Information
 Earth MOID = 1.79958 au 
 Jupiter MOID = 1.99705 au 
 T_jup = 3.171 
[ 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 15.7   n/a MPO494193  

216885 (2008 SD268)          Discovered 2008-Sep-24 by Spacewatch at Kitt Peak
Reference: 20090707/Numbers.arcLast Updated: 2009-07-09

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