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5223 McSween (1981 EX6)
Classification: Main-belt Asteroid          SPK-ID: 2005223
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1763596785214052 6.0584e-08  
a 3.195928640724921 2.101e-08 au
q 2.632295693069322 1.8725e-07 au
i 16.97012635165482 5.3285e-06 deg
node 341.6651819276123 1.3338e-05 deg
peri 19.45402811407657 1.743e-05 deg
M 123.9931477646727 1.1802e-05 deg
tp 2458281.731191825713
(2018-Jun-12.23119183)
6.5363e-05 TDB
period 2086.863472760924
5.71
2.0578e-05
5.634e-08
d
yr
n .1725076914225344 1.7011e-09 deg/d
Q 3.759561588380519 2.4715e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1405  
   data-arc span      14239 days (38.98 yr)  
   first obs. used      1981-02-09  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49307  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 17:32:48  

Additional Information
 Earth MOID = 1.63371 au 
 Jupiter MOID = 1.70942 au 
 T_jup = 3.104 
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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 13.1   n/a MPO458883  
diameter diameter 12.590 km 0.190 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.040   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

5223 McSween           Discovered 1981 Mar. 6 by S. J. Bus at Siding Spring in the course of the U.K. Schmidt-Caltech Asteroid Survey.
A professor at the University of Tennessee, Harry (Hap) McSween Jr. (b. 1945) has specialized in studies of martian meteorites, and he has led the way in integrating petrologic data with results from missions to Mars. He also makes planetary science understandable to the public with his numerous books.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20001013/MPCPages.arcLast Updated: 2013-03-29

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