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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2532878590528588 5.0222e-08  
a 2.356707703010232 1.1293e-08 au
q 1.75978225450139 1.1659e-07 au
i 1.949976376545561 6.4497e-06 deg
node 77.2047331146529 0.00016324 deg
peri 282.9391356436769 0.00016402 deg
M 279.0761200971002 1.229e-05 deg
tp 2459297.551127389075
(2021-Mar-24.05112739)
4.5746e-05 TDB
period 1321.469089079538
3.62
9.4983e-06
2.6e-08
d
yr
n .2724240793636393 1.9581e-09 deg/d
Q 2.953633151519075 1.4153e-08 au
  Orbit Determination Parameters
   # obs. used (total)      206  
   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      .57573  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 03:20:05  

Additional Information
 Earth MOID = .757864 au 
 Jupiter MOID = 2.49993 au 
 T_jup = 3.509 
[ 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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