+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   8840 (1989 WT) Classification: Main-belt Asteroid          SPK-ID: 2008840 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO186496 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.0319308 n/a   a 2.2679710 n/a AU q 2.1955529 n/a AU i 4.42853 n/a deg node 67.11275 n/a deg peri 70.58777 n/a deg M 219.10003 n/a deg tp 2456888.7734132 (2014-Aug-19.27341320) n/a JED period 1247.5405691 3.42 n/a n/a d yr n 0.28856777 n/a deg/d Q 2.3403891 n/a AU   Orbit Determination Parameters    # obs. used (total)      812      first obs. used      1989-??-??      last obs. used      2010-11-15      # oppositions      13      planetary ephem.      DE403      condition code      0      fit RMS      0.52      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.610  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.9 mag n/a PDS3 (MPC 31909)   8840 (1989 WT)          Discovered 1989-Nov-20 by Ueda, S., Kaneda, H. at Kushiro (399) Reference: 19980610/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1989 WT = 1984 GX = 1996 VT7  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-24 09:18 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin