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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 ]

[ show orbit diagram ]
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457429.5 (2016-Feb-11.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1715948429808186 3.0184e-08  
q 2.011481464512925 7.4597e-08 au
tp 2458058.725187420489
(2017-Nov-01.22518742)
4.8607e-05 TDB
node 210.7894948376129 0.00018901 deg
peri 61.77753581134026 0.00018957 deg
i .9795141153468676 4.2849e-06 deg
  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
 Jupiter MOID = 2.25828 au 
 T_jup = 3.489 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.110834412982909E-16 -2.242095947568942E-15 -3.979648425756795E-13 7.826810615374757E-15 -1.222662219845976E-13 -1.31440293785055E-16
q -2.242095947568942E-15 5.564653282980212E-15 8.967739316474335E-13 -1.830466672048193E-14 2.71669792448294E-13 3.717589142381718E-16
tp -3.979648425756795E-13 8.967739316474335E-13 2.362664042481893E-9 -2.276697738670902E-11 7.126991374717319E-10 -5.387867109908843E-15
node 7.826810615374757E-15 -1.830466672048193E-14 -2.276697738670902E-11 3.572624782935853E-8 -3.572714791906066E-8 -7.95813858407601E-12
peri -1.222662219845976E-13 2.71669792448294E-13 7.126991374717319E-10 -3.572714791906066E-8 3.593693395677166E-8 7.943329343231018E-12
i -1.31440293785055E-16 3.717589142381718E-16 -5.387867109908843E-15 -7.95813858407601E-12 7.943329343231018E-12 1.836030119380473E-11

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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