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103210 (1999 XK257)
Classification: Main-belt Asteroid          SPK-ID: 2103210
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06436278322339563 3.6789e-08  
a 2.618674139227151 1.164e-08 au
q 2.450128983271362 9.683e-08 au
i 4.098070440299782 4.027e-06 deg
node 279.3853979118075 5.2714e-05 deg
peri 129.4834797471811 6.1321e-05 deg
M 14.80878460774639 2.9856e-05 deg
tp 2459136.829606852009
(2020-Oct-14.32960685)
0.00012841 TDB
period 1547.820576800519
4.24
1.032e-05
2.825e-08
d
yr
n .2325850976501111 1.5508e-09 deg/d
Q 2.787219295182941 1.2389e-08 au
  Orbit Determination Parameters
   # obs. used (total)      850  
   data-arc span      7711 days (21.11 yr)  
   first obs. used      1999-12-07  
   last obs. used      2021-01-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50483  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 08:33:42  

Additional Information
 Earth MOID = 1.46197 au 
 Jupiter MOID = 2.44964 au 
 T_jup = 3.399 
[ 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 15.3   n/a MPO264069  

103210 (1999 XK257)          Discovered 1999-Dec-07 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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