{"phys_par":[{"desc":"absolute magnitude (magnitude at 1 au from Sun and observer)","name":"H","units":null,"value":"8.80","notes":"IRAS observations used: 20","title":"absolute magnitude","sigma":null,"ref":"MPO980523"},{"ref":"urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)","sigma":"0.903","title":"diameter","value":"143.346","notes":null,"desc":"effective body diameter","name":"diameter","units":"km"},{"desc":"body rotation period (synodic)","name":"rot_per","units":"h","notes":"REFERENCE LIST:[Debehogne, H.; De Sanctis, G.; Zappala, V. (1982) Astron. Astrophys. 108, 197-200.], [Harris, A.W.; Young, J.W. (1989) Icarus 81, 314-364.], [Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html], [Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html], [Pilcher, F. (2019) Minor Planet Bull. 46, 58-60.], [Durech, J.; Tonry, J.; Erasmus, N.; Denneau, L.; et al. (2020) Astron. Astrophys. 643, A59.]","value":"22.132","title":"rotation period","ref":"LCDB (Rev. 2023-October); Warner et al., 2009","sigma":null},{"title":"geometric albedo","sigma":"0.004","ref":"urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)","desc":"geometric albedo","name":"albedo","units":null,"value":"0.030","notes":null},{"desc":"color index B-V magnitude difference","name":"BV","units":null,"value":"0.713","notes":"#obs=10; phase (min.=3.10, mean=10.52, max.=12.83) deg.","title":"B-V","sigma":"0.016","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2"},{"title":"U-B","sigma":"0.037","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2","desc":"color index U-B magnitude difference","units":null,"name":"UB","value":"0.315","notes":"#obs=11; phase (min.=3.10, mean=9.86, max.=12.83) deg."},{"units":null,"name":"spec_T","desc":"Tholen spectral taxonomic classification","notes":"used 7 color indices","value":"C","title":"Tholen spectral type","ref":"EAR-A-5-DDR-TAXONOMY-V4.0","sigma":null},{"name":"spec_B","units":null,"desc":"SMASSII spectral taxonomic classification","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","sigma":null}],"signature":{"source":"NASA/JPL Small-Body Database (SBDB) API","version":"1.3"},"object":{"spkid":"20000156","des":"156","neo":false,"fullname":"156 Xanthippe (A875 WA)","orbit_id":"204","orbit_class":{"code":"MBA","name":"Main-belt Asteroid"},"shortname":"156 Xanthippe","pha":false,"kind":"an","prefix":null},"orbit":{"model_pars":[],"pe_used":"DE441","data_arc":"45497","not_valid_after":null,"cov_epoch":"2457787.5","comment":null,"n_obs_used":12356,"moid_jup":"1.67","t_jup":"3.297","condition_code":"0","sb_used":"SB441-N16","rms":"0.26","n_dop_obs_used":null,"moid":"1.12","not_valid_before":null,"producer":"Otto Matic","epoch":"2461200.5","soln_date":"2026-06-05 03:12:58","source":"JPL","last_obs":"2026-04-13","orbit_id":"204","n_del_obs_used":null,"first_obs":"1901-09-19","elements":[{"sigma":"1.6e-09","value":"0.222","label":"e","title":"eccentricity","units":null,"name":"e"},{"label":"a","title":"semi-major axis","name":"a","units":"au","sigma":"1.8e-09","value":"2.73"},{"value":"2.13","sigma":"4.2e-09","title":"perihelion distance","label":"q","name":"q","units":"au"},{"value":"9.76","sigma":"9.7e-08","title":"inclination; angle with respect to x-y ecliptic plane","label":"i","units":"deg","name":"i"},{"label":"node","title":"longitude of the ascending node","units":"deg","name":"om","value":"242","sigma":"4.9e-07"},{"title":"argument of perihelion","label":"peri","name":"w","units":"deg","value":"339","sigma":"6.1e-07"},{"name":"ma","units":"deg","label":"M","title":"mean anomaly","sigma":"8e-07","value":"329"},{"sigma":"3.8e-06","value":"2461341.983","units":"TDB","name":"tp","label":"tp","title":"time of perihelion passage"},{"value":"1650","sigma":"1.6e-06","label":"period","title":"sidereal orbital period","units":"d","name":"per"},{"sigma":"2.2e-10","value":"0.218","name":"n","units":"deg/d","title":"mean motion","label":"n"},{"sigma":"2.2e-09","value":"3.34","units":"au","name":"ad","title":"aphelion distance","label":"Q"}],"equinox":"J2000","two_body":null}}
