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71212 (1999 XX257)
Classification: Main-belt Asteroid          SPK-ID: 2071212
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1511097628650303 3.6102e-08  
a 2.696375896035248 1.5476e-08 au
q 2.288927173790378 9.5461e-08 au
i 12.90548167869968 5.4986e-06 deg
node 58.40586776335348 2.0234e-05 deg
peri 69.77409824887221 2.8488e-05 deg
M 209.0948156620049 1.9837e-05 deg
tp 2459678.407971079394
(2022-Apr-08.90797108)
9.0911e-05 TDB
period 1617.219916328185
4.43
1.3923e-05
3.812e-08
d
yr
n .2226042335771882 1.9164e-09 deg/d
Q 3.103824618280118 1.7814e-08 au
  Orbit Determination Parameters
   # obs. used (total)      933  
   data-arc span      13745 days (37.63 yr)  
   first obs. used      1980-09-30  
   last obs. used      2018-05-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4862  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-May-31 15:18:56  

Additional Information
 Earth MOID = 1.34099 au 
 Jupiter MOID = 2.11246 au 
 T_jup = 3.317 
[ 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 14.4   n/a MPO436281  

71212 (1999 XX257)          Discovered 1999-Dec-07 by CSS at Catalina
Reference: 20031109/Numbers.arcLast Updated: 2004-04-19

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