{"object":{"fullname":"134 Sophrosyne (A873 SA)","pha":false,"prefix":null,"kind":"an","neo":false,"orbit_class":{"code":"MBA","name":"Main-belt Asteroid"},"spkid":"20000134","des":"134","orbit_id":"153","shortname":"134 Sophrosyne"},"signature":{"version":"1.3","source":"NASA/JPL Small-Body Database (SBDB) API"},"orbit":{"soln_date":"2026-06-05 03:11:38","elements":[{"title":"eccentricity","sigma":"1.5e-09","units":null,"value":"0.115","label":"e","name":"e"},{"sigma":"1.4e-09","units":"au","title":"semi-major axis","value":"2.56","name":"a","label":"a"},{"value":"2.27","sigma":"3.9e-09","units":"au","title":"perihelion distance","label":"q","name":"q"},{"label":"i","name":"i","value":"11.6","title":"inclination; angle with respect to x-y ecliptic plane","units":"deg","sigma":"1.3e-07"},{"label":"node","name":"om","sigma":"4.1e-07","units":"deg","title":"longitude of the ascending node","value":"346"},{"label":"peri","name":"w","value":"85.8","title":"argument of perihelion","units":"deg","sigma":"9.1e-07"},{"value":"13.2","title":"mean anomaly","units":"deg","sigma":"7.9e-07","name":"ma","label":"M"},{"value":"2461145.400","units":"TDB","sigma":"3.3e-06","title":"time of perihelion passage","name":"tp","label":"tp"},{"label":"period","name":"per","value":"1500","title":"sidereal orbital period","sigma":"1.2e-06","units":"d"},{"name":"n","label":"n","value":"0.24","title":"mean motion","units":"deg/d","sigma":"1.9e-10"},{"name":"ad","label":"Q","title":"aphelion distance","sigma":"1.5e-09","units":"au","value":"2.86"}],"moid":"1.32","model_pars":[],"epoch":"2461200.5","data_arc":"54253","not_valid_before":null,"n_dop_obs_used":null,"two_body":null,"producer":"Otto Matic","cov_epoch":"2458080.5","comment":null,"orbit_id":"153","pe_used":"DE441","n_del_obs_used":null,"condition_code":"0","sb_used":"SB441-N16","source":"JPL","t_jup":"3.396","n_obs_used":7572,"first_obs":"1877-09-10","rms":"0.3","moid_jup":"2.42","last_obs":"2026-03-26","equinox":"J2000","not_valid_after":null},"phys_par":[{"notes":"IRAS observations used: 20","value":"8.96","ref":"E2026E92","title":"absolute magnitude","units":null,"sigma":null,"name":"H","desc":"absolute magnitude (magnitude at 1 au from Sun and observer)"},{"desc":"magnitude slope parameter used in the standard asteroid H/G magnitude law","name":"G","units":null,"sigma":null,"ref":"PDS3 (MPC 17257)","title":"magnitude slope","value":"0.28","notes":"Fit"},{"desc":"effective body diameter","name":"diameter","value":"108","notes":"Yeomans E-mail 2001-Apr-04","sigma":null,"units":"km","ref":"Dunham occult. list: Dunham 1981a","title":"diameter"},{"name":"rot_per","desc":"body rotation period (synodic)","notes":"REFERENCE LIST:[Harris, A.W.; Young, J.W. (1989) Icarus 81, 314-364.], [Pilcher, F. (2015) Minor Planet Bull. 42, 280-281.]","value":"17.196","title":"rotation period","ref":"LCDB (Rev. 2023-October); Warner et al., 2009","sigma":null,"units":"h"},{"notes":"IRAS observations used: 20","value":"0.0364","ref":"IRAS-A-FPA-3-RDR-IMPS-V6.0","title":"geometric albedo","units":null,"sigma":"0.001","name":"albedo","desc":"geometric albedo"},{"name":"BV","desc":"color index B-V magnitude difference","notes":"#obs=6; phase (min.=8.28, mean=16.71, max.=25.70) deg.","value":"0.690","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2","title":"B-V","units":null,"sigma":"0.022"},{"desc":"color index U-B magnitude difference","name":"UB","value":"0.322","notes":"#obs=5; phase (min.=8.28, mean=14.91, max.=16.83) deg.","units":null,"sigma":"0.023","title":"U-B","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2"},{"desc":"Tholen spectral taxonomic classification","name":"spec_T","value":"C","notes":"used 7 color indices","units":null,"sigma":null,"ref":"EAR-A-5-DDR-TAXONOMY-V4.0","title":"Tholen spectral type"},{"notes":"based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)","value":"Ch","title":"SMASSII spectral type","ref":"EAR-A-5-DDR-TAXONOMY-V4.0","units":null,"sigma":null,"name":"spec_B","desc":"SMASSII spectral taxonomic classification"}]}
