+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   134 Sophrosyne (A873 SA) Classification: Main-belt Asteroid          SPK-ID: 2000134 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 116 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1149684438681551 1.191e-08   a 2.565361643062594 5.0297e-09 au q 2.270426007000633 2.9171e-08 au i 11.607165733099 1.0807e-06 deg node 345.8665106502489 1.494e-06 deg peri 84.87765922107776 1.0435e-05 deg M 253.9615994812763 1.1764e-05 deg tp 2459642.560784157617 (2022-Mar-04.06078416) 4.9768e-05 TDB period 1500.794820727626 4.11 4.4137e-06 1.208e-08 d yr n .2398728960334913 7.0545e-10 deg/d Q 2.860297279124553 5.608e-09 au   Orbit Determination Parameters    # obs. used (total)      2539      data-arc span      52307 days (143.21 yr)      first obs. used      1877-09-10      last obs. used      2020-11-26      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .42239      source      ORB      producer      Otto Matic      solution date      2021-May-03 17:54:41   Additional Information  Earth MOID = 1.31865 au   Jupiter MOID = 2.4169 au   T_jup = 3.395  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 8.81   n/a MPCxxxxx 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 LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Harris, A.W.; Young, J.W. (1989) Icarus 81, 314-364.] [Pilcher, F. (2015) Minor Planet Bull. 42, 280-281.] geometric albedo albedo 0.0364   0.001 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 20 B-V BV 0.690   0.022 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=6; phase (min.=8.28, mean=16.71, max.=25.70) deg. U-B UB 0.322   0.023 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #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 (A873 SA)          Discovered 1873-Sep-27 by Luther, R. at Dusseldorf Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jun-17 03:59 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin