+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   18032 Geiss (1999 MG1) Classification: Main-belt Asteroid          SPK-ID: 2018032 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO231541 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1404467 n/a   a 2.8346058 n/a AU q 2.4364948 n/a AU i 11.65370 n/a deg node 268.54034 n/a deg peri 358.21561 n/a deg M 340.82279 n/a deg tp 2456493.3582220 (2013-Jul-19.85822200) n/a JED period 1743.1607572 4.77 n/a n/a d yr n 0.20652140 n/a deg/d Q 3.2327168 n/a AU   Orbit Determination Parameters    # obs. used (total)      675      first obs. used      1988-??-??      last obs. used      2012-05-19      # oppositions      15      planetary ephem.      DE403      condition code      0      fit RMS      0.53      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.267  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.2 mag n/a PDS3 (MPO 4225)   18032 Geiss           Discovered 1999 June 20 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station. Johannes Geiss (b. 1926) is a leading Swiss space scientist. He was PI on the Solar Wind Composition experiment aboard Apollo 11-16. The recipient of medals from learned societies of the U.S. and Europe, Geiss is a foreign member of the U.S. Academy of Sciences. The name was suggested by T. C. Owen. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20060613/MPCPages.arc Last Updated: 2008-05-22 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-24 05:01 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin