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4156 Okadanoboru (1988 BE)
Classification: Main-belt Asteroid          SPK-ID: 2004156
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1927757944011299 5.3228e-08  
a 2.697523838488464 1.8285e-08 au
q 2.177506537607865 1.4378e-07 au
i 14.26340165840926 6.8539e-06 deg
node 308.1571990373331 3.0932e-05 deg
peri 130.0562321439448 4.0231e-05 deg
M 144.3719331635516 2.3779e-05 deg
tp 2456751.526990813358
(2014-Apr-04.02699081)
0.00010559 JED
period 1618.252787697477
4.43
1.6454e-05
4.505e-08
d
yr
n .2224621534638134 2.2619e-09 deg/d
Q 3.217541139369063 2.181e-08 au
  Orbit Determination Parameters
   # obs. used (total)      863  
   data-arc span      35928 days (98.37 yr)  
   first obs. used      1917-01-28  
   last obs. used      2015-06-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .4885  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 11:47:50  

Additional Information
 Earth MOID = 1.22108 au 
 Jupiter MOID = 2.08023 au 
 T_jup = 3.298 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.5 mag n/a MPO340725  
rotation period rot_per 12.0146 h n/a LCDB (Rev. 2015-December); 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.]
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 | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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