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78012 (2002 JK55)
Classification: Main-belt Asteroid          SPK-ID: 2078012
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1708490982240022 3.0246e-08  
a 2.428451502279946 8.3645e-09 au
q 2.013552753034694 7.4692e-08 au
i .9810245374475947 4.2855e-06 deg
node 210.7095486517513 0.00018866 deg
peri 61.98547965419503 0.00018922 deg
M 348.0489762437878 1.2478e-05 deg
tp 2459442.387583515449
(2021-Aug-15.88758352)
4.7894e-05 TDB
period 1382.269034230206
3.78
7.1416e-06
1.955e-08
d
yr
n .260441340350568 1.3456e-09 deg/d
Q 2.843350251525199 9.7936e-09 au
  Orbit Determination Parameters
   # obs. used (total)      620  
   data-arc span      9987 days (27.34 yr)  
   first obs. used      1994-03-06  
   last obs. used      2021-07-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51531  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 18:00:39  

Additional Information
 Earth MOID = .997382 au 
 Jupiter MOID = 2.25828 au 
 T_jup = 3.489 
[ 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 16.67   n/a MPO637093  

78012 (2002 JK55)          Discovered 2002-May-09 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 2002 JK55 = 1994 EH8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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