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79101 (1981 EJ31)
Classification: Main-belt Asteroid          SPK-ID: 2079101
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .115964728624275 4.9969e-08  
a 2.426893698380101 9.7916e-09 au
q 2.145459629247489 1.2021e-07 au
i 5.139214520717948 4.9342e-06 deg
node 167.684288754838 4.4537e-05 deg
peri 43.14868006415677 4.7495e-05 deg
M 106.5760839679092 1.5313e-05 deg
tp 2458591.680299647947
(2019-Apr-18.18029965)
5.9064e-05 TDB
period 1380.939199933959
3.78
8.3573e-06
2.288e-08
d
yr
n .2606921434464431 1.5777e-09 deg/d
Q 2.708327767512713 1.0927e-08 au
  Orbit Determination Parameters
   # obs. used (total)      691  
   data-arc span      14417 days (39.47 yr)  
   first obs. used      1981-02-09  
   last obs. used      2020-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57394  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 07:33:54  

Additional Information
 Earth MOID = 1.14374 au 
 Jupiter MOID = 2.25572 au 
 T_jup = 3.495 
[ show covariance matrix ]

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 16.1   n/a MPO432340  

79101 (1981 EJ31)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20040504/Numbers.arcLast Updated: 2004-07-16

[ show close-approach data ]
Alternate Designations
 1981 EJ31 = 2000 GT89 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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