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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1454859503352336 4.9661e-08  
a 3.161161631148619 3.2015e-08 au
q 2.701257027077685 1.663e-07 au
i .8990389741731252 6.2126e-06 deg
node 14.04478621038541 0.0003092 deg
peri 308.6286361369089 0.00030985 deg
M 322.1878239175702 2.2671e-05 deg
tp 2457816.124274295454
(2017-Mar-03.62427430)
0.00013044 JED
period 2052.903238817647
5.62
3.1186e-05
8.538e-08
d
yr
n .1753614068081158 2.664e-09 deg/d
Q 3.621066235219554 3.6673e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1138  
   data-arc span      13374 days (36.62 yr)  
   first obs. used      1978-11-30  
   last obs. used      2015-07-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54461  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 14:22:04  

Additional Information
 Earth MOID = 1.68835 au 
 Jupiter MOID = 1.68528 au 
 T_jup = 3.188 
[ 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  
rotation period rot_per 4.01 h n/a LCDB (Rev. 2016-February); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Clark, M. (2014) Minor Planet Bul. 41, 178-183.]

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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