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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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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1511097803102012 3.4435e-08  
a 2.696375899124282 1.4032e-08 au
q 2.28892712937389 9.2181e-08 au
i 12.90548203842948 4.6809e-06 deg
node 58.40586220593736 2.0078e-05 deg
peri 69.77410049284178 2.6764e-05 deg
M 209.0948193713351 1.8874e-05 deg
tp 2459678.407955580995
(2022-Apr-08.90795558)
8.7292e-05 TDB
period 1617.219919107275
4.43
1.2624e-05
3.456e-08
d
yr
n .2226042331946568 1.7376e-09 deg/d
Q 3.103824668874674 1.6152e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1075  
   data-arc span      14630 days (40.05 yr)  
   first obs. used      1980-09-30  
   last obs. used      2020-10-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49188  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:57:15  

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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