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249122 (2007 XU21)
Classification: Main-belt Asteroid          SPK-ID: 2249122
[ 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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1201548002754145 4.7869e-08  
a 2.601893804597459 2.239e-08 au
q 2.289263774168213 1.321e-07 au
i 3.237878446783122 4.1881e-06 deg
node 270.0004165426673 8.8181e-05 deg
peri 274.4174629880487 9.0015e-05 deg
M 253.8096377313418 2.1707e-05 deg
tp 2459452.684195465690
(2021-Aug-26.18419547)		 9.5065e-05 TDB
period 1532.966899159872
4.20		 1.9788e-05
5.418e-08		 d
yr
n .2348387301756447 3.0313e-09 deg/d
Q 2.914523835026706 2.508e-08 au
   Orbit Determination Parameters
   # obs. used (total)      353  
   data-arc span      9482 days (25.96 yr)  
   first obs. used      1994-11-10  
   last obs. used      2020-10-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49642  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 00:20:11  

Additional Information
 Earth MOID = 1.29391 au 
 Jupiter MOID = 2.06352 au 
 T_jup = 3.402 
[ 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 16.0   n/a MPO454845  

249122 (2007 XU21)          Discovered 2007-Dec-10 by LINEAR at Socorro
Reference: 20100824/Numbers.arcLast Updated: 2010-08-27

[ show close-approach data ]
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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