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JPL Small-Body Database Browser
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7987 Walshkevin (1981 EV22)
Classification: Main-belt Asteroid          SPK-ID: 2007987
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 59 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2031173490613219 3.7366e-08  
a 2.773514481913564 1.5646e-08 au
q 2.210165572764095 1.075e-07 au
i 3.302769441769607 3.929e-06 deg
node 168.3236834900414 6.9722e-05 deg
peri 221.3721128088848 7.0647e-05 deg
M 311.7604819797866 1.5855e-05 deg
tp 2459226.570837339283
(2021-Jan-12.07083734)
7.5633e-05 TDB
period 1687.112657469741
4.62
1.4276e-05
3.909e-08
d
yr
n .2133823123228252 1.8056e-09 deg/d
Q 3.336863391063032 1.8824e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1410  
   data-arc span      14100 days (38.60 yr)  
   first obs. used      1981-02-09  
   last obs. used      2019-09-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55511  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 18:42:56  

Additional Information
 Earth MOID = 1.2166 au 
 Jupiter MOID = 2.11016 au 
 T_jup = 3.303 
[ show covariance matrix ]

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 13.8   n/a MPO435775  

7987 Walshkevin           Discovered 1981 Mar. 2 by S. J. Bus at Siding Spring in the course of the U.K. Schmidt-Caltech Asteroid Survey.
Kevin John Walsh (b. 1978) is a scientist at the Southwest Research Institute of Boulder, CO. His research includes the composition and formation of minor-planet binaries as well as early solar system dynamical processes that may have had consequences for shaping the current structure of the asteroid belt.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20120506/MPCPages.arcLast Updated: 2012-05-09

[ show close-approach data ]
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