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6227 Alanrubin (1981 EQ42)
Classification: Outer Main-belt Asteroid          SPK-ID: 2006227
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .153758624410473 3.1174e-08  
a 3.235742603076112 2.0114e-08 au
q 2.738219271480766 9.9863e-08 au
i .5118794990669351 4.4475e-06 deg
node 200.9849169611671 0.0004169 deg
peri 80.17587425462483 0.0004172 deg
M 202.135488354367 1.547e-05 deg
tp 2459932.769308918763
(2022-Dec-19.26930892)
9.1322e-05 TDB
period 2125.980992891753
5.82
1.9823e-05
5.427e-08
d
yr
n .1693335929171827 1.5789e-09 deg/d
Q 3.733265934671458 2.3207e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2122  
   data-arc span      15954 days (43.68 yr)  
   first obs. used      1976-05-29  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50935  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 17:57:39  

Additional Information
 Earth MOID = 1.72181 au 
 Jupiter MOID = 1.40989 au 
 T_jup = 3.166 
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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 MPO384811  
diameter diameter 11.431 km 0.099 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.090   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

6227 Alanrubin           Discovered 1981 Mar. 2 by S. J. Bus at Siding Spring in the course of the U.K. Schmidt-Caltech Asteroid Survey.
Alan Rubin (b. 1953), a research geochemist at the University of California in Los Angeles, works on a wide variety of topics such as the origin of chondrules and shock processes in meteorites. He is best known for studying the geologic processes that altered the parent bodies of chondritic meteorites.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020624/MPCPages.arcLast Updated: 2003-10-02

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Alternate Designations
 1981 EQ42 = 1976 MA = 1978 VM3 = 1978 WJ9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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