{"phys_par":[{"value":"8.47","notes":"IRAS observations used: 16","units":null,"sigma":null,"title":"absolute magnitude","ref":"MPO964267","desc":"absolute magnitude (magnitude at 1 au from Sun and observer)","name":"H"},{"units":"km","sigma":"2.5","ref":"IRAS-A-FPA-3-RDR-IMPS-V6.0","title":"diameter","value":"136.12","notes":"IRAS observations used: 16","desc":"effective body diameter","name":"diameter"},{"desc":"body rotation period (synodic)","name":"rot_per","sigma":null,"units":"h","ref":"LCDB (Rev. 2023-October); Warner et al., 2009","title":"rotation period","value":"10.283","notes":"REFERENCE LIST:[Di Martino, M.; Dotto, E.; Celino, A.; Barucci, M.A.; Fulchignoni, M. (1995) Astron. Astrophys. Suppl. Ser. 112, 1-7.], [Holliday, B. (1996) Minor Planet Bull. 23, 43.], [Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html], [Koff, R.A. (2005) Minor Planet Bull. 32, 32-34.], [Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html], [Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html], [Collaborative Asteroid Lightcurve Link (CALL) (2011) http://www.minorplanetobserver.com/DATA/submissions_results.htm], [Hamanowa, H.; Hamanowa, H. (2011) http://www2.ocn.ne.jp/~hamaten/astlcdata.htm], [Behrend, R. (2013) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html], [Shevchenko, V.G.; Velichko, F.P.; Checha, V.A.; Krugly, Y.N. (2014) Minor Planet Bull. 41, 195-198.], [Behrend, R. (2015) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html], [Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.], [Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]"},{"name":"albedo","desc":"geometric albedo","ref":"IRAS-A-FPA-3-RDR-IMPS-V6.0","title":"geometric albedo","units":null,"sigma":"0.002","notes":"IRAS observations used: 16","value":"0.0465"},{"desc":"color index B-V magnitude difference","name":"BV","value":"0.704","notes":"#obs=1; phase=2.98 deg.","units":null,"sigma":"0.020","title":"B-V","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2"},{"ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2","title":"U-B","sigma":"0.030","units":null,"notes":"#obs=1; phase=2.98 deg.","value":"0.286","name":"UB","desc":"color index U-B magnitude difference"},{"sigma":null,"units":null,"ref":"EAR-A-5-DDR-TAXONOMY-V4.0","title":"Tholen spectral type","value":"DCX:","notes":"used 2 color indices","desc":"Tholen spectral taxonomic classification","name":"spec_T"}],"orbit":{"source":"JPL","t_jup":"3.205","condition_code":"0","n_del_obs_used":null,"sb_used":"SB441-N16","not_valid_after":null,"moid_jup":"1.88","rms":"0.29","last_obs":"2025-12-09","equinox":"J2000","first_obs":"1880-02-08","n_obs_used":8599,"data_arc":"53265","not_valid_before":null,"moid":"1.81","epoch":"2461200.5","model_pars":[],"soln_date":"2026-06-05 03:17:45","elements":[{"value":"0.103","title":"eccentricity","units":null,"sigma":"1.8e-09","name":"e","label":"e"},{"name":"a","label":"a","title":"semi-major axis","sigma":"3.4e-09","units":"au","value":"3.12"},{"name":"q","label":"q","value":"2.8","title":"perihelion distance","sigma":"5.4e-09","units":"au"},{"label":"i","name":"i","value":"4.28","units":"deg","sigma":"1.4e-07","title":"inclination; angle with respect to x-y ecliptic plane"},{"label":"node","name":"om","value":"313","title":"longitude of the ascending node","units":"deg","sigma":"1.7e-06"},{"name":"w","label":"peri","value":"106","sigma":"2.2e-06","units":"deg","title":"argument of perihelion"},{"name":"ma","label":"M","value":"308","title":"mean anomaly","sigma":"2e-06","units":"deg"},{"label":"tp","name":"tp","units":"TDB","sigma":"1.2e-05","title":"time of perihelion passage","value":"2461491.551"},{"name":"per","label":"period","value":"2010","sigma":"3.3e-06","units":"d","title":"sidereal orbital period"},{"label":"n","name":"n","value":"0.179","title":"mean motion","sigma":"2.9e-10","units":"deg/d"},{"label":"Q","name":"ad","value":"3.44","title":"aphelion distance","units":"au","sigma":"3.8e-09"}],"orbit_id":"123","pe_used":"DE441","cov_epoch":"2456843.5","comment":null,"n_dop_obs_used":null,"two_body":null,"producer":"Otto Matic"},"object":{"des":"212","shortname":"212 Medea","orbit_id":"123","kind":"an","neo":false,"orbit_class":{"name":"Main-belt Asteroid","code":"MBA"},"spkid":"20000212","pha":false,"prefix":null,"fullname":"212 Medea (A880 CA)"},"signature":{"version":"1.3","source":"NASA/JPL Small-Body Database (SBDB) API"}}