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79102 (1981 EP31)
Classification: Main-belt Asteroid          SPK-ID: 2079102
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 .2180353156199208 3.7725e-08  
a 2.425143197872782 9.1614e-09 au
q 1.896376335301086 9.3305e-08 au
i 3.754374115313897 5.7844e-06 deg
node 18.91427659675166 5.0191e-05 deg
peri 294.2278574442142 5.182e-05 deg
M 25.07285598149731 1.2436e-05 deg
tp 2458904.426013098111
(2020-Feb-24.92601310)
4.759e-05 TDB
period 1379.445377511188
3.78
7.8166e-06
2.14e-08
d
yr
n .260974450941665 1.4788e-09 deg/d
Q 2.953910060444478 1.1159e-08 au
  Orbit Determination Parameters
   # obs. used (total)      988  
   data-arc span      14418 days (39.47 yr)  
   first obs. used      1981-02-09  
   last obs. used      2020-08-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56152  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 07:34:15  

Additional Information
 Earth MOID = .8863 au 
 Jupiter MOID = 2.34411 au 
 T_jup = 3.475 
[ 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 15.5   n/a MPO385312  
diameter diameter 4.180 km 0.431 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.077   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

79102 (1981 EP31)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20040504/Numbers.arcLast Updated: 2004-07-16
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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