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385658 (2005 SS21)
Classification: Mars-crossing Asteroid          SPK-ID: 2385658
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1198504365053213 6.2407e-08  
a 1.8804768886203 6.8904e-09 au
q 1.655100912680989 1.164e-07 au
i 22.24701726916131 6.1545e-06 deg
node 202.302350663429 1.2527e-05 deg
peri 218.3880007838895 2.1874e-05 deg
M 288.7109402826896 1.7449e-05 deg
tp 2459387.018027076287
(2021-Jun-21.51802708)
4.5915e-05 TDB
period 941.8905230862332
2.58
5.1769e-06
1.417e-08
d
yr
n .3822100246007474 2.1007e-09 deg/d
Q 2.105852864559611 7.7162e-09 au
  Orbit Determination Parameters
   # obs. used (total)      224  
   data-arc span      5491 days (15.03 yr)  
   first obs. used      2005-09-03  
   last obs. used      2020-09-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5657  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 11:06:10  

Additional Information
 Earth MOID = .686844 au 
 Jupiter MOID = 3.24328 au 
 T_jup = 3.872 
[ 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 17.92   n/a MPCxxxxx  

385658 (2005 SS21)          Discovered 2005-Sep-26 by Spacewatch at Kitt Peak
Reference: Last Updated: 2014-02-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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