+ View the NASA Portal + Near-Earth Object (NEO) Project Search JPL JPL Small-Body Database Browser Search: [ help ]   21400 Ahdout (1998 FM57) Classification: Main-belt Asteroid          SPK-ID: 2021400 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2455200.5 (2010-Jan-04.0) TDB Reference: MPO148749 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.2013786 n/a   a 2.3136641 n/a AU q 1.8477417 n/a AU i 3.60585 n/a deg node 350.23156 n/a deg peri 298.19711 n/a deg M 46.48764 n/a deg tp 2455034.5092560 (2009-Jul-22.00925601) n/a JED period 1285.4313072 3.52 n/a n/a d yr n 0.28006164 n/a deg/d Q 2.7795865 n/a AU   Orbit Determination Parameters    # obs. used (total)      397      first obs. used      1994-??-??      last obs. used      2008-05-29      # oppositions      9      planetary ephem.      DE403      quality code      0      fit RMS      0.52      data source      MPC:mpn      producer      MPC   Additional Information  T_jup = 3.553  [ 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 8734)   21400 Ahdout           Discovered 1998 Mar. 20 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Zimra Payvand Ahdout (b. 1988) was awarded second place in the 2006 Intel International Science and Engineering Fair for her chemistry team project. She attends the Roslyn High School, Roslyn Heights, 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: 20060711/MPCPages.arc Last Updated: 2006-07-17 Alternate Designations  1998 FM57 = 1999 VS78  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2010-Feb-10 07:01 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin