Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1537384085056915 2.9449e-08  
a 3.235493157348241 1.6912e-08 au
q 2.738073588606467 9.6905e-08 au
i .5119356496794415 3.9921e-06 deg
node 200.9637850140671 0.00040406 deg
peri 80.2591862737583 0.0004043 deg
M 235.9225723752402 1.5124e-05 deg
tp 2459933.154861546369
(2022-Dec-19.65486155)
9.0004e-05 TDB
period 2125.735157520786
5.82
1.6667e-05
4.563e-08
d
yr
n .1693531758772164 1.3278e-09 deg/d
Q 3.732912726090014 1.9512e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2413  
   data-arc span      16367 days (44.81 yr)  
   first obs. used      1976-05-29  
   last obs. used      2021-03-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49307  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 22:46:06  

Additional Information
 Earth MOID = 1.71977 au 
 Jupiter MOID = 1.40966 au 
 T_jup = 3.166 
[ 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 13.10   n/a MPCxxxxx  
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

[ show close-approach data ]
Alternate Designations
 1981 EQ42 = 1976 MA = 1978 VM3 = 1978 WJ9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jun-18 14:32 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin