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4156 Okadanoboru (1988 BE)
Classification: Main-belt Asteroid          SPK-ID: 2004156
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1921673526727697 3.5496e-08  
a 2.697874082906534 1.2405e-08 au
q 2.179430762549909 9.4353e-08 au
i 14.26218639234434 5.8092e-06 deg
node 308.1471087167273 1.7624e-05 deg
peri 129.8238579982437 2.4794e-05 deg
M 140.470820309535 1.5885e-05 deg
tp 2458368.940083202194
(2018-Sep-07.44008320)
7.0448e-05 TDB
period 1618.567966971408
4.43
1.1163e-05
3.056e-08
d
yr
n .2224188340225316 1.534e-09 deg/d
Q 3.216317403263159 1.4789e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1752  
   data-arc span      37626 days (103.01 yr)  
   first obs. used      1917-01-28  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39298  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 17:05:57  

Additional Information
 Earth MOID = 1.22364 au 
 Jupiter MOID = 2.07486 au 
 T_jup = 3.298 
[ 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 12.5   n/a MPO431545  
diameter diameter 15.479 km 0.067 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 12.015 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.091   0.042 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
SMASSII spectral type spec_B Cgh   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

4156 Okadanoboru           Discovered 1988 Jan. 16 by T. Kojima at Chiyoda.
Noboru Okada (1953-2002?) was a Japanese adventurer, photographer, moun-tain-climber and amateur astronomer who installed a 0.5-m telescope at the Yatsugatake mountain base. In Jan. 2002 he disappeared while climbing alone in the Japan North Alps.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060219/MPCPages.arcLast Updated: 2010-06-03

[ show close-approach data ]
Alternate Designations
 1988 BE = 1979 BL = A917 BC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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