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

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1462283997919659 4.35e-08  
a 3.162176508219231 1.9609e-08 au
q 2.699776497562587 1.3842e-07 au
i .8984975040389017 5.6051e-06 deg
node 14.022430161854 0.00024619 deg
peri 308.6077343467919 0.00024672 deg
M 137.4659222761722 1.672e-05 deg
tp 2457816.221809381071
9.4642e-05 TDB
period 2053.891931526029
n .1752769921699445 1.6303e-09 deg/d
Q 3.624576518875876 2.2476e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1510  
   data-arc span      14681 days (40.19 yr)  
   first obs. used      1978-11-30  
   last obs. used      2019-02-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53152  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 18:50:25  

Additional Information
 Earth MOID = 1.68659 au 
 Jupiter MOID = 1.68984 au 
 T_jup = 3.188 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.4   n/a MPO256919  
diameter diameter 11.746 km 0.138 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 4.01 h n/a LCDB (Rev. 2019-January); 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 Bull. 41, 178-183.]
geometric albedo albedo 0.056   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

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

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Alternate Designations
 1981 EW20 = 1989 VU5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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