+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   166 Rhodope Classification: Main-belt Asteroid          SPK-ID: 2000166 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO240185 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.2097291 n/a   a 2.6859465 n/a AU q 2.1226254 n/a AU i 12.02641 n/a deg node 128.94184 n/a deg peri 264.73397 n/a deg M 326.14063 n/a deg tp 2456551.7240421 (2013-Sep-16.22404210) n/a JED period 1607.8460745 4.40 n/a n/a d yr n 0.22390203 n/a deg/d Q 3.2492676 n/a AU   Orbit Determination Parameters    # obs. used (total)      1101      first obs. used      1885-??-??      last obs. used      2012-09-02      # oppositions      32      planetary ephem.      DE403      condition code      0      fit RMS      0.53      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.311  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 9.89 mag n/a PDS3 (MPC 17257)   rotation period rot_per 4.715 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Published Reference List: [Behrend, R. (2001) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Collaborative Asteroid Lightcurve Link (CALL) (2011) http://www.minorplanetobserver.com/DATA/submi ssions_results.htm] B-V BV .725 mag .021 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=2; phase (min.=11.88, mean=11.89, max.=11.89) deg. U-B UB .425 mag .035 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=2; phase (min.=11.88, mean=11.89, max.=11.89) deg. Tholen spectral type spec_T GC:   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices SMASSII spectral type spec_B Xe   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) 166 Rhodope          Discovered 1876-Aug-15 by Peters, C. H. F. at Clinton Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-18 09:20 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin