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(2015 XN261)
Classification: Aten [NEO]          SPK-ID: 3736504
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | 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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1637684869435937 3.943e-05  
a .9739083261501884 4.1175e-06 au
q .8144128331548041 4.1838e-05 au
i 2.321464070891352 0.00040279 deg
node 278.5059850375999 0.00059842 deg
peri 274.896400057717 0.0021959 deg
M 137.7384189094499 0.011522 deg
tp 2458866.183880056573
(2020-Jan-17.68388006)
0.010384 TDB
period 351.0553087691669
0.96
0.0022263
6.095e-06
d
yr
n 1.025479435882038 6.5033e-06 deg/d
Q 1.133403819145573 4.7918e-06 au
  Orbit Determination Parameters
   # obs. used (total)      166  
   data-arc span      12 days  
   first obs. used      2015-12-10  
   last obs. used      2015-12-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      3  
   norm. resid. RMS      .33512  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-06 08:29:56  

Additional Information
 Earth MOID = .00533795 au 
 Jupiter MOID = 3.82424 au 
 T_jup = 6.196 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 26.2   n/a E2015Y84  

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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