+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   23644 Yamaneko (1997 AW17) Classification: Main-belt Asteroid          SPK-ID: 2023644 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO231581 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1282257 n/a   a 2.3950566 n/a AU q 2.0879488 n/a AU i 2.13832 n/a deg node 78.16367 n/a deg peri 112.95193 n/a deg M 87.89758 n/a deg tp 2456069.9428714 (2012-May-22.44287140) n/a JED period 1353.8548648 3.71 n/a n/a d yr n 0.26590738 n/a deg/d Q 2.7021644 n/a AU   Orbit Determination Parameters    # obs. used (total)      608      first obs. used      1997-??-??      last obs. used      2012-05-17      # oppositions      12      planetary ephem.      DE403      condition code      0      fit RMS      0.53      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.517  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.5 mag n/a PDS3 (MPO 11151)   23644 Yamaneko           Discovered 1997 Jan. 13 by A. Nakamura at Kuma Kogen. The Yamaneko Group of Comet Observers, founded by K. Ichikawa and the discoverer in 1980, is the most prolific group of comet observers in Japan. The members have obtained some 12~300 astrometric and 6300 photometric observations, contributing them to the MPC and International Astronomical Quarterly, respectively. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20020724/MPCPages.arc Last Updated: 2003-10-02 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-Jun-20 11:12 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin