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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1927167669723548 6.9093e-08  
a 2.699120410082935 2.1112e-08 AU
q 2.178954650982655 1.9213e-07 AU
i 14.26450144909968 7.5295e-06 deg
node 308.1666348722595 3.3526e-05 deg
peri 130.2361394922725 4.4824e-05 deg
M 55.21883762950127 2.4619e-05 deg
tp 2456752.062828918858
(2014-Apr-04.56282892)
0.00011077 JED
period 1619.689682519287
4.43
1.9003e-05
5.203e-08
d
yr
n .2222647979334234 2.6078e-09 deg/d
Q 3.219286169183215 2.5181e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      771  
   data-arc span      35764 days (97.92 yr)  
   first obs. used      1917-01-28  
   last obs. used      2014-12-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50401  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-08 00:05:53  

Additional Information
 Earth MOID = 1.22253 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 12.3 mag n/a MPO279558  
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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