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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 | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1708362253765869 3.1932e-08  
a 2.429027960816492 1.1451e-08 au
q 2.014061992656414 7.6975e-08 au
i .9808384790397926 5.1178e-06 deg
node 210.7190953288261 0.00023512 deg
peri 61.87624316388524 0.00023576 deg
M 245.0232721754991 1.8599e-05 deg
tp 2459442.126008165522
(2021-Aug-15.62600817)
7.2882e-05 TDB
period 1382.761241755473
3.79
9.7778e-06
2.677e-08
d
yr
n .2603486336823883 1.841e-09 deg/d
Q 2.843993928976569 1.3407e-08 au
  Orbit Determination Parameters
   # obs. used (total)      483  
   data-arc span      9461 days (25.90 yr)  
   first obs. used      1994-03-06  
   last obs. used      2020-01-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55955  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 18:17:11  

Additional Information
 Earth MOID = .998018 au 
 Jupiter MOID = 2.2594 au 
 T_jup = 3.488 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456879.5 (2014-Aug-10.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1715757118512985 3.1861e-08  
q 2.011993557721582 7.6842e-08 au
tp 2456677.119337392018
(2014-Jan-19.61933739)
6.5565e-05 TDB
node 210.7915110624736 0.00023565 deg
peri 61.89267607441418 0.00023629 deg
i .9792455805911813 5.1168e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      483  
   data-arc span      9461 days (25.90 yr)  
   first obs. used      1994-03-06  
   last obs. used      2020-01-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55955  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 18:17:11  

Additional Information
 Jupiter MOID = 2.2594 au 
 T_jup = 3.488 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.015117403411282E-15 -2.43002414516443E-15 5.761907705594668E-14 -6.832072101357577E-15 -3.899076718892012E-15 1.164458248627914E-16
q -2.43002414516443E-15 5.90463381298078E-15 1.603573499919379E-15 1.723624946570335E-14 4.751603993092167E-14 -2.992660301801659E-16
tp 5.761907705594668E-14 1.603573499919379E-15 4.298733426697101E-9 -1.215720054606688E-11 1.151326523267171E-9 -8.256676921815308E-13
node -6.832072101357577E-15 1.723624946570335E-14 -1.215720054606688E-11 5.553149870088274E-8 -5.552585554745968E-8 -3.826598295516304E-10
peri -3.899076718892012E-15 4.751603993092167E-14 1.151326523267171E-9 -5.552585554745968E-8 5.583222030673992E-8 3.823818869908997E-10
i 1.164458248627914E-16 -2.992660301801659E-16 -8.256676921815308E-13 -3.826598295516304E-10 3.823818869908997E-10 2.618204041542329E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.5   n/a MPO453200  

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

[ show close-approach data ]
Alternate Designations
 2002 JK55 = 1994 EH8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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