+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   7973 Koppeschaar (1344 T-2) Classification: Main-belt Asteroid          SPK-ID: 2007973 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO250288 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.0886470 n/a   a 2.8700764 n/a AU q 2.6156527 n/a AU i 2.32452 n/a deg node 137.76260 n/a deg peri 316.47879 n/a deg M 328.57096 n/a deg tp 2456555.5483800 (2013-Sep-20.04838000) n/a JED period 1775.9822378 4.86 n/a n/a d yr n 0.20270473 n/a deg/d Q 3.1245001 n/a AU   Orbit Determination Parameters    # obs. used (total)      597      first obs. used      1951-??-??      last obs. used      2013-01-14      # oppositions      18      planetary ephem.      DE403      condition code      0      fit RMS      0.60      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.291  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.4 mag n/a PDS3 (MPC 30752)   7973 Koppeschaar           Discovered 1973 Sept. 29 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels. Carl Egon Koppeschaar is a science writer and reporter in the Netherlands. He is internationally known for popularizing astrophysics and space science, for debunking pseudoscience, and for taking action against light pollution. His Moon Handbook: a 21st-Century Travel Guide is a delight. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20000124/MPCPages.arc Last Updated: 2013-03-29 Alternate Designations  1344 T-2 = 1990 EO5  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-19 17:15 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin