+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   134 Sophrosyne Classification: Main-belt Asteroid          SPK-ID: 2000134 [ 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 71 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1164089938455168 4.8755e-08   a 2.562815712224156 7.0445e-09 AU q 2.26448091375266 1.2535e-07 AU i 11.59607575487665 6.9036e-06 deg node 346.0252120265453 2.4711e-05 deg peri 85.1928215242944 3.9024e-05 deg M 301.1675572469314 3.1126e-05 deg tp 2456645.400050045363 (2013-Dec-18.90005005) 0.00012976 JED period 1498.561234085972 4.10 6.1787e-06 1.692e-08 d yr n .2402304235632901 9.905e-10 deg/d Q 2.861150510695651 7.8646e-09 AU   Orbit Determination Parameters    # obs. used (total)      1061      data-arc span      49345 days (135.10 yr)      first obs. used      1877-09-10      last obs. used      2012-10-17      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .58881      data source      ORB      producer      Otto Matic      solution date      2013-Mar-29 14:23:16   Additional Information  Earth MOID = 1.31269 AU   T_jup = 3.396  [ 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 8.76 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 20 magnitude slope G 0.28   n/a PDS3 (MPC 17257) Fit diameter diameter 108 km n/a Dunham occult. list: Dunham 1981a Yeomans E-mail 2001-Apr-04 rotation period rot_per 17.196 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Published Reference List: [Harris, A.W.; Young, J.W. (1989) Icarus 81, 314-364.] geometric albedo albedo 0.0364   0.001 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 20 B-V BV .690 mag .022 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=6; phase (min.=8.28, mean=16.71, max.=25.70) deg. U-B UB .322 mag .023 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=5; phase (min.=8.28, mean=14.91, max.=16.83) deg. Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices SMASSII spectral type spec_B Ch   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) 134 Sophrosyne          Discovered 1873-Sep-27 by Luther, R. at Dusseldorf Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-23 15:03 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin