+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   6642 Henze (1990 UE3) Classification: Main-belt Asteroid          SPK-ID: 2006642 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO253409 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.2478647 n/a   a 3.1627369 n/a AU q 2.3788061 n/a AU i 4.32297 n/a deg node 30.73174 n/a deg peri 59.17759 n/a deg M 335.59640 n/a deg tp 2456539.7657816 (2013-Sep-04.26578160) n/a JED period 2054.4379255 5.62 n/a n/a d yr n 0.17523041 n/a deg/d Q 3.9466677 n/a AU   Orbit Determination Parameters    # obs. used (total)      927      first obs. used      1953-??-??      last obs. used      2013-02-06      # oppositions      19      planetary ephem.      DE403      condition code      0      fit RMS      0.53      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.152  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.0 mag n/a PDS3 (MPC 25944)   rotation period rot_per 4.4696 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Published Reference List: [Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] 6642 Henze           Discovered 1990 Oct. 26 by T. Urata at Oohira. Martin Henze (b. 1981), an astronomer at the Max-Planck-Institut für extraterrestrische Physik, has discovered many optical novae in M31 on archival photographic plates at the Tautenburg Observatory. He also works on the discovery and analysis of optical and x-ray transients in nearby galaxies. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20081113/MPCPages.arc Last Updated: 2008-11-17 Alternate Designations  1990 UE3 = 1974 DH2 = 1975 EN5 = 1984 UP  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-23 21:32 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin