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79109 (1981 EN39)
Classification: Main-belt Asteroid          SPK-ID: 2079109
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05524226218792225 3.6604e-08  
a 2.778519364297465 2.1452e-08 au
q 2.625027669080726 1.0493e-07 au
i 3.039441259150362 5.4442e-06 deg
node 188.3109456571465 7.884e-05 deg
peri 85.81895241253201 9.4518e-05 deg
M 71.49392603335212 5.0977e-05 deg
tp 2458664.541824118447
(2019-Jun-30.04182412)
0.0002395 TDB
period 1691.681378092708
4.63
1.9591e-05
5.364e-08
d
yr
n .212806031125012 2.4645e-09 deg/d
Q 2.932011059514205 2.2637e-08 au
  Orbit Determination Parameters
   # obs. used (total)      581  
   data-arc span      13597 days (37.23 yr)  
   first obs. used      1981-02-09  
   last obs. used      2018-05-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55022  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 04:51:41  

Additional Information
 Earth MOID = 1.611 au 
 Jupiter MOID = 2.11584 au 
 T_jup = 3.330 
[ 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 15.3   n/a MPO436334  

79109 (1981 EN39)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20040504/Numbers.arcLast Updated: 2004-07-16

Alternate Designations
 1981 EN39 = 2000 GE123 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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