+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   23121 Michaelding (2000 AP51) Classification: Main-belt Asteroid          SPK-ID: 2023121 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO247556 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.0591852 n/a   a 2.7364156 n/a AU q 2.5744603 n/a AU i 6.37876 n/a deg node 330.83308 n/a deg peri 116.47824 n/a deg M 303.78382 n/a deg tp 2456658.6845992 (2014-Jan-01.18459920) n/a JED period 1653.3755177 4.53 n/a n/a d yr n 0.21773638 n/a deg/d Q 2.8983709 n/a AU   Orbit Determination Parameters    # obs. used (total)      543      first obs. used      1992-??-??      last obs. used      2012-12-08      # oppositions      12      planetary ephem.      DE403      condition code      0      fit RMS      0.56      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.340  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.5 mag n/a PDS3 (MPO 10216)   23121 Michaelding           Discovered 2000 Jan. 4 by the Lincoln Laboratory Near-Earth Asteroid Research Team in Socorro. Michael Ding (b. 1990) was awarded second place in the 2007 Intel International Science and Engineering Fair for his chemistry project. He attends the Glen Cove High School, Glen Cove, New York, U.S.A. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20070828/MPCPages.arc Last Updated: 2007-08-30 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-21 22:16 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin