+ View the NASA Portal + Near-Earth Object (NEO) Project Search JPL JPL Small-Body Database Browser Search: [ help ]   9954 Brachiosaurus (1991 GX7) Classification: Main-belt Asteroid          SPK-ID: 2009954 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2455200.5 (2010-Jan-04.0) TDB Reference: MPO77289 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1322126 n/a   a 2.7581743 n/a AU q 2.3935089 n/a AU i 9.09536 n/a deg node 3.79676 n/a deg peri 48.10283 n/a deg M 179.04037 n/a deg tp 2454368.3924550 (2007-Sep-24.89245500) n/a JED period 1673.1350377 4.58 n/a n/a d yr n 0.21516494 n/a deg/d Q 3.1228397 n/a AU   Orbit Determination Parameters    # obs. used (total)      351      first obs. used      1984-??-??      last obs. used      2005-06-02      # oppositions      9      planetary ephem.      DE403      quality code      0      fit RMS      0.57      data source      MPC:mpn      producer      MPC   Additional Information  T_jup = 3.312  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.6 mag n/a PDS3 (MPC 33660)   9954 Brachiosaurus           Discovered 1991 Apr. 8 by E. W. Elst at the European Southern Observatory. Brachiosaurus, the heaviest of all dinosaurs (about 70 tons) had a very long neck with a small head. Preferring swampy areas, where the water would have supported its weight, it lived during in Jurassic--Lower Cretaceous times. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20021120/MPCPages.arc Last Updated: 2003-10-02 Alternate Designations  1991 GX7 = 1984 WP5 = 1993 UO3  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2010-Feb-10 07:33 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin