+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   23460 (1989 SX9) Classification: Main-belt Asteroid          SPK-ID: 2023460 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO231580 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.2184901 n/a   a 2.2777351 n/a AU q 1.7800725 n/a AU i 0.62321 n/a deg node 146.47024 n/a deg peri 239.86159 n/a deg M 289.50040 n/a deg tp 2456646.3880398 (2013-Dec-19.88803980) n/a JED period 1255.6056252 3.44 n/a n/a d yr n 0.28671423 n/a deg/d Q 2.7753977 n/a AU   Orbit Determination Parameters    # obs. used (total)      568      first obs. used      1989-??-??      last obs. used      2012-05-24      # oppositions      16      planetary ephem.      DE403      condition code      0      fit RMS      0.57      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.576  [ 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 11092)   23460 (1989 SX9)          Discovered 1989-Sep-26 by Debehogne, H. at La Silla (809) Reference: 20010408/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1989 SX9 = 2001 BT62  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-23 16:41 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin