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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1259110845538234 3.1923e-08  
a 2.327746031282568 5.541e-09 au
q 2.034657003917922 7.5312e-08 au
i .8095968630765673 3.1938e-06 deg
node 53.40909055080605 0.00025134 deg
peri 67.74263367812829 0.00025169 deg
M 340.5498755647339 1.3175e-05 deg
tp 2459270.584455333675
(2021-Feb-25.08445533)
4.7521e-05 TDB
period 1297.184704606639
3.55
4.6317e-06
1.268e-08
d
yr
n .2775240863706971 9.9093e-10 deg/d
Q 2.620835058647214 6.2387e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2588  
   data-arc span      15835 days (43.35 yr)  
   first obs. used      1977-11-11  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45436  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 23:02:19  

Additional Information
 Earth MOID = 1.0506 au 
 Jupiter MOID = 2.43867 au 
 T_jup = 3.562 
[ 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 13.79   n/a MPCxxxxx  
diameter diameter 4.629 km 0.055 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 2.55 h n/a LCDB (Rev. 2020-October); 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] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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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