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295550 (2008 SC21)
Classification: Main-belt Asteroid          SPK-ID: 2295550
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03780229366602842 7.635e-08  
a 3.128521774513997 3.7356e-08 au
q 3.010256475653254 2.4662e-07 au
i 9.28287338790102 1.0338e-05 deg
node 331.6596546912839 3.4262e-05 deg
peri 40.29169802036458 0.00012486 deg
M 13.93882365484657 0.00011801 deg
tp 2458922.241625522176
(2020-Mar-13.74162552)
0.00066255 TDB
period 2021.190274705906
5.53
3.6201e-05
9.911e-08
d
yr
n .178112869681397 3.1901e-09 deg/d
Q 3.246787073374739 3.8768e-08 au
  Orbit Determination Parameters
   # obs. used (total)      140  
   data-arc span      8088 days (22.14 yr)  
   first obs. used      1997-09-06  
   last obs. used      2019-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .64685  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 07:01:14  

Additional Information
 Earth MOID = 2.01367 au 
 Jupiter MOID = 1.97104 au 
 T_jup = 3.193 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457410.5 (2016-Jan-23.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03929555333825762 8.1354e-08  
q 3.005284883160448 2.6299e-07 au
tp 2456866.064969868481
(2014-Jul-27.56496987)
0.00059971 TDB
node 331.9348309806322 3.4139e-05 deg
peri 34.17764807598495 0.00011436 deg
i 9.304570159762891 1.0353e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      140  
   data-arc span      8088 days (22.14 yr)  
   first obs. used      1997-09-06  
   last obs. used      2019-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .64685  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 07:01:14  

Additional Information
 Jupiter MOID = 1.97104 au 
 T_jup = 3.193 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.618458996012161E-15 -2.119955725171178E-14 -2.535131081506577E-11 1.265734761978845E-14 -4.529678374790425E-12 -1.435668884797258E-14
q -2.119955725171178E-14 6.916540941730762E-14 7.897057679329974E-11 -4.715535016977019E-14 1.416396088678223E-11 5.270746959615163E-14
tp -2.535131081506577E-11 7.897057679329974E-11 3.596555422769999E-7 -9.958509050272902E-11 6.54674067279859E-8 9.176508770940678E-11
node 1.265734761978845E-14 -4.715535016977019E-14 -9.958509050272902E-11 1.165499026170984E-9 -1.166820035363032E-9 -2.306757477510229E-11
peri -4.529678374790425E-12 1.416396088678223E-11 6.54674067279859E-8 -1.166820035363032E-9 1.307771702257659E-8 3.91610680258936E-11
i -1.435668884797258E-14 5.270746959615163E-14 9.176508770940678E-11 -2.306757477510229E-11 3.91610680258936E-11 1.071805668660948E-10

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.1   n/a MPO494581  

295550 (2008 SC21)          Discovered 2008-Sep-19 by Spacewatch at Kitt Peak
Reference: 20110912/Numbers.arcLast Updated: 2011-09-14
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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