+ View the NASA Portal + Near-Earth Object (NEO) Project Search JPL JPL Small-Body Database Browser Search: [ help ]   3216 Harrington (1980 RB) Classification: Main-belt Asteroid          SPK-ID: 2003216 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2455200.5 (2010-Jan-04.0) TDB Reference: MPO47593 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.3040344 n/a   a 2.3951462 n/a AU q 1.6669394 n/a AU i 4.92041 n/a deg node 108.06245 n/a deg peri 224.19974 n/a deg M 330.67193 n/a deg tp 2455310.8004952 (2010-Apr-24.30049520) n/a JED period 1353.9308335 3.71 n/a n/a d yr n 0.26589246 n/a deg/d Q 3.1233530 n/a AU   Orbit Determination Parameters    # obs. used (total)      255      first obs. used      1954-??-??      last obs. used      2002-07-26      # oppositions      12      planetary ephem.      DE403      quality code      1      fit RMS      0.60      data source      MPC:mpn      producer      MPC   Additional Information  T_jup = 3.460  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.0 mag n/a PDS3 (MPC 17268)   SMASSII spectral type spec_B S   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) 3216 Harrington (1980 RB)           Discovered 1980-Sep-04 by Bowell, E. at Flagstaff (AM) (688) Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1980 RB = 1969 TH3  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2009-Nov-23 19:40 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin