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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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06721705962603494 4.874e-08  
a 2.614969015505912 1.609e-08 AU
q 2.439198487270417 1.2708e-07 AU
i 3.616153931213313 5.921e-06 deg
node 21.79012230183192 7.6985e-05 deg
peri 229.5058630961406 8.9179e-05 deg
M 293.4958659381356 4.5053e-05 deg
tp 2457285.827998570897
(2015-Sep-20.32799857)
0.00019329 JED
period 1544.536756015368
4.23
1.4255e-05
3.903e-08
d
yr
n .2330795939934356 2.1512e-09 deg/d
Q 2.790739543741406 1.7171e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1344  
   data-arc span      12496 days (34.21 yr)  
   first obs. used      1981-03-01  
   last obs. used      2015-05-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48697  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 16:01:42  

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
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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