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8454 (1981 EG1)
Classification: Main-belt Asteroid          SPK-ID: 2008454
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06721706524731115 5.0703e-08  
a 2.614969020415417 1.9801e-08 AU
q 2.439198477150457 1.2969e-07 AU
i 3.616154636925666 5.9838e-06 deg
node 21.79006551074165 8.6747e-05 deg
peri 229.5059255092179 0.00010044 deg
M 293.4958578291972 5.3605e-05 deg
tp 2457285.828034164863
(2015-Sep-20.32803416)
0.000231 JED
period 1544.536760365082
4.23
1.7543e-05
4.803e-08
d
yr
n .2330795933370384 2.6473e-09 deg/d
Q 2.790739563680378 2.1132e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1212  
   data-arc span      12077 days (33.07 yr)  
   first obs. used      1981-03-01  
   last obs. used      2014-03-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49022  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 19:16:05  

Additional Information
 Earth MOID = 1.42854 AU 
 T_jup = 3.402 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.5 mag n/a MPO253423  

8454 (1981 EG1)          Discovered 1981-Mar-05 by Debehogne, H., DeSanctis, G. at La Silla (809)
Reference: 19980313/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 EG1 = 1981 EU1 = 1981 GC1 = 1987 UZ9 = 1989 CT1 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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