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233887 (2008 XC21)
Classification: Main-belt Asteroid          SPK-ID: 2233887
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1833423135797712 8.04e-08  
a 2.522120562696994 3.1142e-08 au
q 2.059709143605012 2.0844e-07 au
i 2.889040675668713 9.1305e-06 deg
node 256.8750087755499 0.00017073 deg
peri 97.09659348114553 0.00017349 deg
M 31.23092899707999 3.7829e-05 deg
tp 2458873.580137343491
(2020-Jan-25.08013734)
0.0001525 TDB
period 1463.009651765895
4.01
2.7097e-05
7.419e-08
d
yr
n .2460680963830072 4.5576e-09 deg/d
Q 2.984531981788975 3.6852e-08 au
  Orbit Determination Parameters
   # obs. used (total)      162  
   data-arc span      14153 days (38.75 yr)  
   first obs. used      1979-07-24  
   last obs. used      2018-04-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59052  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-May-07 06:13:15  

Additional Information
 Earth MOID = 1.05718 au 
 Jupiter MOID = 2.46778 au 
 T_jup = 3.430 
[ 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 15.8   n/a MPO251645  

233887 (2008 XC21)          Discovered 2008-Dec-01 by Spacewatch at Kitt Peak
Reference: 20100228/Numbers.arcLast Updated: 2010-03-03

[ show close-approach data ]
Alternate Designations
 2008 XC21 = 1979 OS = 2004 XW81 = 2006 ES62 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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