+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   7004 Markthiemens (1979 OB9) Classification: Main-belt Asteroid          SPK-ID: 2007004 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO256916 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1788628 n/a   a 2.3235436 n/a AU q 1.9079481 n/a AU i 5.01713 n/a deg node 212.53567 n/a deg peri 173.37937 n/a deg M 120.55020 n/a deg tp 2455967.2983447 (2012-Feb-09.79834470) n/a JED period 1293.6734731 3.54 n/a n/a d yr n 0.27827733 n/a deg/d Q 2.7391391 n/a AU   Orbit Determination Parameters    # obs. used (total)      768      first obs. used      1979-??-??      last obs. used      2013-03-12      # oppositions      18      planetary ephem.      DE403      condition code      0      fit RMS      0.57      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.549  [ 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 27292)   7004 Markthiemens           Discovered 1979 July 24 by S. J. Bus at Siding Spring. Mark H. Thiemens (b. 1950) is a professor of chemistry at the University of California, San Diego. He is known for his seminal work on the "mass-independent isotope effect" and for his studies of the early atmosphere of Mars based on isotopic measurements from Martian meteorites. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20060809/MPCPages.arc Last Updated: 2007-08-08 Alternate Designations  1979 OB9 = 1982 JC2 = 1983 VH7  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-23 09:03 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin