+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   4156 Okadanoboru (1988 BE) Classification: Main-belt Asteroid          SPK-ID: 2004156 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO240227 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1921072 n/a   a 2.6982046 n/a AU q 2.1798601 n/a AU i 14.26364 n/a deg node 308.16995 n/a deg peri 130.30856 n/a deg M 281.77269 n/a deg tp 2456752.2763631 (2014-Apr-04.77636310) n/a JED period 1618.8654667 4.43 n/a n/a d yr n 0.22237796 n/a deg/d Q 3.2165491 n/a AU   Orbit Determination Parameters    # obs. used (total)      572      first obs. used      1917-??-??      last obs. used      2012-10-07      # oppositions      16      planetary ephem.      DE403      condition code      0      fit RMS      0.54      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.298  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.1 mag n/a PDS3 (MPC 28111)   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.arc Last Updated: 2010-06-03 Alternate Designations  1988 BE = 1979 BL = A917 BC  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-19 00:31 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin