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7454 Kevinrighter (1981 EW20)
Classification: Main-belt Asteroid          SPK-ID: 2007454
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1437822740675035 5.295e-08  
a 3.165531014476262 3.7233e-08 AU
q 2.710383766583654 1.7204e-07 AU
i .8989753708794664 6.288e-06 deg
node 14.06497114930295 0.00035422 deg
peri 308.3533581098033 0.00035495 deg
M 182.1693330188059 2.2576e-05 deg
tp 2457816.684211179472
(2017-Mar-04.18421118)
0.0001326 JED
period 2057.161018595836
5.63
3.6294e-05
9.937e-08
d
yr
n .1749984550289246 3.0875e-09 deg/d
Q 3.62067826236887 4.2586e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1001  
   data-arc span      12953 days (35.46 yr)  
   first obs. used      1978-11-30  
   last obs. used      2014-05-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55105  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-16 13:37:17  

Additional Information
 Earth MOID = 1.69694 AU 
 T_jup = 3.187 
[ 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 13.4 mag n/a MPO256919  

7454 Kevinrighter           Discovered 1981 Mar. 2 by S. J. Bus at Siding Spring in the course of the U.K. Schmidt-Caltech Asteroid Survey.
Kevin Righter (b. 1965) is curator of Antarctic meteorites at NASA's Johnson Space Center. His research focuses on the chemical processes occurring during early planetary differentiation.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060809/MPCPages.arcLast Updated: 2007-08-08

[ show close-approach data ]
Alternate Designations
 1981 EW20 = 1989 VU5 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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