+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   2060 Chiron (1977 UB) Classification: Centaur          SPK-ID: 2002060 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: JPL 89 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3803659797957286 1.0919e-07   a 13.6532230321495 1.5475e-06 AU q 8.46000147615635 1.0039e-06 AU i 6.929449422368333 8.6178e-06 deg node 209.3557401732507 9.7985e-05 deg peri 339.3298742575888 9.9254e-05 deg M 122.8444574834622 2.6067e-05 deg tp 2450112.619638770905 (1996-Jan-30.11963877) 0.00063182 JED period 18426.8543849218 50.45 0.0031328 8.577e-06 d yr n .01953670401251872 3.3214e-09 deg/d Q 18.84644458814266 2.1361e-06 AU   Orbit Determination Parameters    # obs. used (total)      1163      data-arc span      42913 days (117.49 yr)      first obs. used      1895-04-24      last obs. used      2012-10-20      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .54835      data source      ORB      producer      Otto Matic      solution date      2012-Dec-03 13:58:18   Additional Information  Earth MOID = 7.46214 AU   T_jup = 3.355  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 6.5 mag n/a PDS3 (MPC 28107)   diameter diameter 166 km n/a Dunham occultation list: Duham 1998 Yeomans E-mail 2001-Apr-04 rotation period rot_per 5.918 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Published Reference List: [Bus, S.J.; Bowell, E.; Harris, A.W.; Hewitt, A.V. (1989) Icarus 77, 223-238.] [Luu, J.X.; Jewitt, D.C. (1990) Astron. J. 100, 913-932.] [Marcialis, R.L.; Buratti, B.J. (1993) Icarus 104, 234-243.] [Lazzaro, D.; Florczak, M.A.; Angeli, C.A.; Carvano, J.M.; et al. (1997) Planet. Space Sci. 45, 1607-1614.] geometric albedo albedo 0.15   0.03 Earth, Moon, and Planets, v. 89, Issue 1, p. 117-134 (2002)   B-V BV .704 mag .024 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=3; phase (min.=1.81, mean=2.51, max.=2.88) deg. U-B UB .283 mag .060 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=3; phase (min.=1.81, mean=2.51, max.=2.88) deg. Tholen spectral type spec_T B   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 4 color indices; used ground-based radiometric albedo SMASSII spectral type spec_B Cb   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) 2060 Chiron (1977 UB)          Discovered 1977-Oct-18 by Kowal, C. at Palomar (675) Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1977 UB = 95P  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-19 08:04 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin