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71201 (1999 XL239)
Classification: Main-belt Asteroid          SPK-ID: 2071201
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1512808622132527 5.9989e-08  
a 2.680779154003073 1.8322e-08 au
q 2.275228572182174 1.6807e-07 au
i 13.80575080628833 5.582e-06 deg
node 279.0271001534784 2.5673e-05 deg
peri 33.75166640580658 3.2243e-05 deg
M 58.50483728618773 1.7597e-05 deg
tp 2459135.957090571240
(2020-Oct-13.45709057)
7.8397e-05 TDB
period 1603.208413956183
4.39
1.6435e-05
4.5e-08
d
yr
n .2245497197158791 2.302e-09 deg/d
Q 3.086329735823972 2.1093e-08 au
  Orbit Determination Parameters
   # obs. used (total)      640  
   data-arc span      10547 days (28.88 yr)  
   first obs. used      1992-01-30  
   last obs. used      2020-12-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55033  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 12:54:55  

Additional Information
 Earth MOID = 1.27226 au 
 Jupiter MOID = 2.17649 au 
 T_jup = 3.319 
[ 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 14.75   n/a E2021B10  

71201 (1999 XL239)          Discovered 1999-Dec-07 by CSS at Catalina
Reference: 20031109/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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