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JPL Small-Body Database Browser
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215154 (1999 XR139)
Classification: Main-belt Asteroid          SPK-ID: 2215154
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.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2533800478149419 5.0265e-08  
a 2.355939529195855 1.1517e-08 au
q 1.758991458639098 1.1659e-07 au
i 1.950135597144467 6.531e-06 deg
node 77.20290070256297 0.00016443 deg
peri 283.0359350256325 0.00016521 deg
M 169.9480648843804 1.2229e-05 deg
tp 2457976.968557182058
(2017-Aug-11.46855718)
4.4185e-05 TDB
period 1320.82303830392
3.62
9.6852e-06
2.652e-08
d
yr
n .2725573294529138 1.9986e-09 deg/d
Q 2.952887599752613 1.4435e-08 au
  Orbit Determination Parameters
   # obs. used (total)      198  
   data-arc span      8631 days (23.63 yr)  
   first obs. used      1995-07-19  
   last obs. used      2019-03-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59688  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 06:40:42  

Additional Information
 Earth MOID = .756225 au 
 Jupiter MOID = 2.49724 au 
 T_jup = 3.510 
[ 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 17.6   n/a MPO266615  

215154 (1999 XR139)          Discovered 1999-Dec-02 by Spacewatch at Kitt Peak
Reference: 20090607/Numbers.arcLast Updated: 2009-06-08

Alternate Designations
 1999 XR139 = 1995 OM1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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