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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 58 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2044583102909259 3.8889e-08  
a 2.77533411624248 1.5876e-08 au
q 2.207893992342782 1.1089e-07 au
i 3.300748001143009 4.8606e-06 deg
node 168.5020165559885 7.057e-05 deg
peri 220.9596201741861 7.1574e-05 deg
M 226.8648850124006 1.5372e-05 deg
tp 2459225.041720510189
(2021-Jan-10.54172051)
7.555e-05 TDB
period 1688.773239160907
4.62
1.4491e-05
3.967e-08
d
yr
n .2131724921096402 1.8292e-09 deg/d
Q 3.342774240142178 1.9122e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1282  
   data-arc span      13968 days (38.24 yr)  
   first obs. used      1981-02-09  
   last obs. used      2019-05-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56181  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 01:32:25  

Additional Information
 Earth MOID = 1.21356 au 
 Jupiter MOID = 2.10226 au 
 T_jup = 3.302 
[ 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 ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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