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JPL Small-Body Database Browser
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(2015 XN55)
Classification: Apollo [NEO]          SPK-ID: 3735995
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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2540995937124149 3.6634e-05  
a 1.209580590009132 4.6442e-05 au
q .9022266535253883 9.6719e-06 au
i 2.955280461969548 0.0004978 deg
node 75.95965810869184 0.0002457 deg
peri 61.29652937980687 7.6461e-05 deg
M 157.0634816415013 0.049773 deg
tp 2458388.506102173019
(2018-Sep-27.00610217)
0.054972 TDB
period 485.9041861297144
1.33
0.027984
7.662e-05
d
yr
n .7408868050045906 4.267e-05 deg/d
Q 1.516934526492875 5.8243e-05 au
  Orbit Determination Parameters
   # obs. used (total)      184  
   # delay obs. used      0  
   # Doppler obs. used      1  
   data-arc span      11 days  
   first obs. used      2015-12-04  
   last obs. used      2015-12-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      5  
   norm. resid. RMS      .27834  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-06 08:30:11  

Additional Information
 Earth MOID = .00638759 au 
 Jupiter MOID = 3.50865 au 
 T_jup = 5.233 
[ 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 27.2   n/a E2016A20  

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