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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1494777646649826 3.5987e-08  
a 2.699763200686464 1.5552e-08 au
q 2.296208632323072 9.5142e-08 au
i 12.91474803716677 5.5022e-06 deg
node 58.46378050291943 2.0192e-05 deg
peri 69.67502091513137 2.8688e-05 deg
M 120.2472924674637 1.9949e-05 deg
tp 2458059.297564196675
(2017-Nov-01.79756420)
8.8853e-05 TDB
period 1620.268306181736
4.44
1.4e-05
3.833e-08
d
yr
n .2221854236279932 1.9198e-09 deg/d
Q 3.103317769049855 1.7877e-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 = 1.3485 au 
 Jupiter MOID = 2.11425 au 
 T_jup = 3.316 
[ 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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