+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   2073 Janacek (1974 DK) Classification: Main-belt Asteroid          SPK-ID: 2002073 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO250219 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1131894 n/a   a 2.7157834 n/a AU q 2.4083855 n/a AU i 2.96512 n/a deg node 85.05070 n/a deg peri 0.77831 n/a deg M 325.77537 n/a deg tp 2456555.9094376 (2013-Sep-20.40943760) n/a JED period 1634.7115374 4.48 n/a n/a d yr n 0.22022234 n/a deg/d Q 3.0231813 n/a AU   Orbit Determination Parameters    # obs. used (total)      1035      first obs. used      1972-??-??      last obs. used      2013-01-23      # oppositions      25      planetary ephem.      DE403      condition code      0      fit RMS      0.55      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.350  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.7 mag n/a PDS3 (MPC 17264)   SMASSII spectral type spec_B X   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002) 2073 Janacek (1974 DK)          Discovered 1974-Feb-19 by Kohoutek, L. at Bergedorf Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1974 DK = 1972 TQ1 = 1972 TU6  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-18 11:42 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin