+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   23066 Yihedong (1999 XN54) Classification: Main-belt Asteroid          SPK-ID: 2023066 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO236511 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.0614937 n/a   a 2.8274777 n/a AU q 2.6536056 n/a AU i 2.31072 n/a deg node 162.17446 n/a deg peri 144.34733 n/a deg M 46.02749 n/a deg tp 2456178.4698264 (2012-Sep-07.96982640) n/a JED period 1736.5896447 4.75 n/a n/a d yr n 0.20730286 n/a deg/d Q 3.0013498 n/a AU   Orbit Determination Parameters    # obs. used (total)      404      first obs. used      1992-??-??      last obs. used      2012-08-10      # oppositions      13      planetary ephem.      DE403      condition code      0      fit RMS      0.56      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.311  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.0 mag n/a PDS3 (MPO 10200)   23066 Yihedong           Discovered 1999 Dec. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team in Socorro. Yihe Dong (b. 1990) was awarded first place and Best in Category in the 2007 Intel International Science and Engineering Fair for her animal sciences project. She attends the Cedar Shoals High School, Athens, Georgia, 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 Alternate Designations  1999 XN54 = 1998 OP9  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-23 07:32 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin