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102207 (1999 SK21)
Classification: Main-belt Asteroid          SPK-ID: 2102207
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02860184458419207 5.3207e-08  
a 2.547904354664788 1.4832e-08 au
q 2.475029590297279 1.3869e-07 au
i 2.496016542119167 5.4637e-06 deg
node 351.1332923567054 0.00011269 deg
peri 118.749007256407 0.00014377 deg
M 352.117464055784 8.8154e-05 deg
tp 2459233.026442613483
(2021-Jan-18.52644261)		 0.00036376 TDB
period 1485.501547182428
4.07		 1.2971e-05
3.551e-08		 d
yr
n .2423423931687027 2.1161e-09 deg/d
Q 2.620779119032296 1.5256e-08 au
   Orbit Determination Parameters
   # obs. used (total)      331  
   data-arc span      7771 days (21.28 yr)  
   first obs. used      1999-09-30  
   last obs. used      2021-01-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52015  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 08:30:50  

Additional Information
 Earth MOID = 1.49269 au 
 Jupiter MOID = 2.38915 au 
 T_jup = 3.440 
[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.7   n/a MPO449618  

102207 (1999 SK21)          Discovered 1999-Sep-30 by Spacewatch at Kitt Peak
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1999 SK21 = 2001 DG2 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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