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21231 (1995 SC17)
Classification: Main-belt Asteroid          SPK-ID: 2021231
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2445920600551453 3.1301e-08  
a 2.651472683616709 1.0197e-08 au
q 2.002943517750953 8.4667e-08 au
i 4.420429173471105 3.8204e-06 deg
node 172.4729280825221 4.5625e-05 deg
peri 111.86570537972 4.6343e-05 deg
M 351.2987173588473 9.5673e-06 deg
tp 2459238.616229911537
(2021-Jan-24.11622991)
4.2013e-05 TDB
period 1576.990810901375
4.32
9.097e-06
2.491e-08
d
yr
n .2282828774342899 1.3169e-09 deg/d
Q 3.300001849482464 1.2691e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1588  
   data-arc span      9623 days (26.35 yr)  
   first obs. used      1994-03-14  
   last obs. used      2020-07-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55457  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:42:00  

Additional Information
 Earth MOID = .989846 au 
 Jupiter MOID = 1.89289 au 
 T_jup = 3.343 
[ 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 14.43   n/a E2021B10  

21231 (1995 SC17)          Discovered 1995-Sep-18 by Spacewatch at Kitt Peak
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1995 SC17 = 1999 NP47 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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