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6737 Okabayashi (1993 ER)
Classification: Main-belt Asteroid          SPK-ID: 2006737
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1258221441818082 3.3e-08  
a 2.327285735687877 6.8925e-09 au
q 2.034461654299891 7.6999e-08 au
i .8096271637925597 3.4898e-06 deg
node 53.41013123683194 0.00028805 deg
peri 67.81387010578456 0.00028851 deg
M 284.9664113367265 1.7831e-05 deg
tp 2459270.787652105257
6.4844e-05 TDB
period 1296.799959742822
n .2776064244105886 1.2332e-09 deg/d
Q 2.620109817075863 7.7598e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2178  
   data-arc span      15380 days (42.11 yr)  
   first obs. used      1977-11-11  
   last obs. used      2019-12-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48371  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 20:33:52  

Additional Information
 Earth MOID = 1.05048 au 
 Jupiter MOID = 2.43975 au 
 T_jup = 3.563 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.8   n/a MPO492831  
diameter diameter 4.629 km 0.055 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 2.55 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pray, D.P.; Galad, A.; Husark, M.; Oey, J. (2008) Minor Planet Bull. 35, 34-37.]
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.395   0.063 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

6737 Okabayashi           Discovered 1993 Mar. 15 by K. Endate and K. Watanabe at Kitami.
Named in memory of Shigeki Okabayashi (1913-1944), a self-taught Japanese astronomer. The first in Japan to discover more than one kind of new celestial object, he discovered Nova V630 Sgr in 1936 and comet C/1940 S1 (Okabayashi-Honda), and also independently discovered C/1939 H1 and C/1939 V1. He was employed by Kurashiki Observatory from 1939 to 1941. Tragically, he was killed on his way home from a geological survey in Sumatra when his hospital ship was torpedoed. Name proposed by the discoverers following a suggestion by T. Sato and A. Fujii.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19980411/MPCPages.arcLast Updated: 2009-11-17

Alternate Designations
 1993 ER = 1977 VO = 1982 BT9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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