+ View the NASA Portal + Near-Earth Object (NEO) Project Search JPL JPL Small-Body Database Browser Search: [ help ]   3371 Giacconi (1955 RZ) Classification: Main-belt Asteroid          SPK-ID: 2003371 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2455200.5 (2010-Jan-04.0) TDB Reference: MPO62177 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.0151801 n/a   a 2.7394561 n/a AU q 2.6978709 n/a AU i 9.67404 n/a deg node 293.78610 n/a deg peri 350.23144 n/a deg M 72.31384 n/a deg tp 2454867.8298248 (2009-Feb-05.32982481) n/a JED period 1656.1319805 4.53 n/a n/a d yr n 0.21737398 n/a deg/d Q 2.7810413 n/a AU   Orbit Determination Parameters    # obs. used (total)      274      first obs. used      1955-??-??      last obs. used      2004-04-21      # oppositions      13      planetary ephem.      DE403      quality code      0      fit RMS      0.72      data source      MPC:mpn      producer      MPC   Additional Information  T_jup = 3.330  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.3 mag n/a PDS3 (MPC 17268)   SMASSII spectral type spec_B Sq   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) 3371 Giacconi (1955 RZ)           Discovered 1955-Sep-14 by Goethe Link Observatory at Brooklyn Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1955 RZ = 1955 TP = 1975 BK1  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2010-Feb-10 06:11 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin