+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   9937 Triceratops (1988 DJ2) Classification: Main-belt Asteroid          SPK-ID: 2009937 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO256938 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.2322753 n/a   a 2.3661028 n/a AU q 1.8165156 n/a AU i 1.26483 n/a deg node 327.50621 n/a deg peri 46.96680 n/a deg M 56.21436 n/a deg tp 2456192.9161211 (2012-Sep-22.41612110) n/a JED period 1329.3791198 3.64 n/a n/a d yr n 0.27080311 n/a deg/d Q 2.9156900 n/a AU   Orbit Determination Parameters    # obs. used (total)      792      first obs. used      1983-??-??      last obs. used      2013-03-12      # oppositions      17      planetary ephem.      DE403      condition code      0      fit RMS      0.61      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.511  [ 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 (MPC 33656)   9937 Triceratops           Discovered 1988 Feb. 17 by E. W. Elst at the European Southern Observatory. Triceratops was a heavy dinosaur with three horns, two above the eyes and one on the snout. It lived in Upper Cretaceous times. Many Triceratops skeletons have been found in Wyoming and Colorado. 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  1988 DJ2 = 1983 VY2 = 1990 QZ7 = 1990 RH6  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-18 23:00 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin