{"object":{"orbit_id":"80","orbit_class":{"name":"Main-belt Asteroid","code":"MBA"},"fullname":"227 Philosophia (A882 PA)","kind":"an","des":"227","neo":false,"shortname":"227 Philosophia","pha":false,"spkid":"20000227","prefix":null},"signature":{"version":"1.3","source":"NASA/JPL Small-Body Database (SBDB) API"},"phys_par":[{"value":"9.13","ref":"MPO914115","title":"absolute magnitude","units":null,"notes":null,"sigma":null,"name":"H","desc":"absolute magnitude (magnitude at 1 au from Sun and observer)"},{"units":"km","value":"123.891","ref":"urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)","title":"diameter","desc":"effective body diameter","name":"diameter","sigma":"1.074","notes":null},{"ref":"LCDB (Rev. 2023-October); Warner et al., 2009","title":"rotation period","value":"26.468","units":"h","name":"rot_per","notes":"REFERENCE LIST:[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html], [Pilcher, F.; Alkema, M.S. (2014) Minor Planet Bull. 41, 233-234.], [Marciniak, A.; Pilcher, F.; Oszkiewicz, D.; Santana-Ros, T.; et al. (2015) Planet. Space Sci. 118, 256-266.], [Marciniak, A.; Bartczak, P.; Muller, T.; Sanabria, J.J.; et al. (2018) Astron. Astrophys. 610, A7.]","sigma":null,"desc":"body rotation period (synodic)"},{"units":null,"ref":"urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)","title":"geometric albedo","value":"0.065","desc":"geometric albedo","sigma":"0.004","notes":null,"name":"albedo"}],"orbit":{"epoch":"2461200.5","equinox":"J2000","n_dop_obs_used":null,"data_arc":"43173","condition_code":"0","n_del_obs_used":null,"elements":[{"label":"e","units":null,"sigma":"1.4e-09","title":"eccentricity","value":"0.2","name":"e"},{"units":"au","label":"a","name":"a","value":"3.15","title":"semi-major axis","sigma":"3.5e-09"},{"sigma":"6.5e-09","title":"perihelion distance","name":"q","value":"2.52","label":"q","units":"au"},{"label":"i","units":"deg","sigma":"5.6e-08","name":"i","value":"9.09","title":"inclination; angle with respect to x-y ecliptic plane"},{"units":"deg","label":"node","name":"om","value":"325","title":"longitude of the ascending node","sigma":"4.3e-07"},{"label":"peri","units":"deg","sigma":"7.8e-07","title":"argument of perihelion","value":"272","name":"w"},{"sigma":"1.5e-06","name":"ma","value":"338","title":"mean anomaly","label":"M","units":"deg"},{"name":"tp","value":"2461325.027","title":"time of perihelion passage","sigma":"8.8e-06","units":"TDB","label":"tp"},{"units":"d","label":"period","value":"2040","name":"per","title":"sidereal orbital period","sigma":"3.4e-06"},{"label":"n","units":"deg/d","sigma":"3e-10","title":"mean motion","value":"0.176","name":"n"},{"label":"Q","units":"au","sigma":"4.2e-09","value":"3.78","name":"ad","title":"aphelion distance"}],"soln_date":"2026-06-05 03:19:08","comment":null,"moid_jup":"1.44","t_jup":"3.157","not_valid_before":null,"rms":"0.3","sb_used":"SB441-N16","model_pars":[],"cov_epoch":"2458130.5","last_obs":"2026-04-13","not_valid_after":null,"source":"JPL","producer":"Otto Matic","two_body":null,"n_obs_used":8887,"first_obs":"1908-01-30","orbit_id":"80","pe_used":"DE441","moid":"1.53"}}