{"signature":{"version":"1.3","source":"NASA/JPL Small-Body Database (SBDB) API"},"object":{"orbit_id":"148","orbit_class":{"code":"MBA","name":"Main-belt Asteroid"},"fullname":"387 Aquitania (A894 EC)","kind":"an","des":"387","neo":false,"spkid":"20000387","shortname":"387 Aquitania","pha":false,"prefix":null},"orbit":{"condition_code":"0","n_del_obs_used":null,"elements":[{"label":"e","units":null,"sigma":"1.7e-09","value":"0.238","name":"e","title":"eccentricity"},{"title":"semi-major axis","name":"a","value":"2.74","sigma":"2.1e-09","units":"au","label":"a"},{"sigma":"4.7e-09","name":"q","value":"2.08","title":"perihelion distance","label":"q","units":"au"},{"name":"i","value":"18.1","title":"inclination; angle with respect to x-y ecliptic plane","sigma":"1.8e-07","units":"deg","label":"i"},{"sigma":"6.2e-07","title":"longitude of the ascending node","name":"om","value":"128","label":"node","units":"deg"},{"units":"deg","label":"peri","value":"158","name":"w","title":"argument of perihelion","sigma":"7.9e-07"},{"sigma":"8.3e-07","value":"306","name":"ma","title":"mean anomaly","label":"M","units":"deg"},{"sigma":"4e-06","title":"time of perihelion passage","name":"tp","value":"2461449.682","label":"tp","units":"TDB"},{"sigma":"1.9e-06","title":"sidereal orbital period","value":"1650","name":"per","label":"period","units":"d"},{"sigma":"2.5e-10","value":"0.218","name":"n","title":"mean motion","label":"n","units":"deg/d"},{"label":"Q","units":"au","sigma":"2.6e-09","title":"aphelion distance","value":"3.39","name":"ad"}],"soln_date":"2026-06-05 03:32:10","comment":null,"moid_jup":"1.88","t_jup":"3.240","not_valid_before":null,"epoch":"2461200.5","equinox":"J2000","n_dop_obs_used":null,"data_arc":"48243","source":"JPL","producer":"Otto Matic","two_body":null,"n_obs_used":6542,"first_obs":"1894-03-07","orbit_id":"148","pe_used":"DE441","moid":"1.08","rms":"0.35","sb_used":"SB441-N16","model_pars":[],"cov_epoch":"2457856.5","last_obs":"2026-04-07","not_valid_after":null},"phys_par":[{"title":"absolute magnitude","ref":"E2025L21","value":"7.49","units":null,"name":"H","sigma":null,"notes":"IRAS observations used: 6","desc":"absolute magnitude (magnitude at 1 au from Sun and observer)"},{"value":"100.51","title":"diameter","ref":"IRAS-A-FPA-3-RDR-IMPS-V6.0","units":"km","sigma":"2.9","notes":"IRAS observations used: 6","name":"diameter","desc":"effective body diameter"},{"value":"24.144","title":"rotation period","ref":"LCDB (Rev. 2023-October); Warner et al., 2009","units":"h","sigma":null,"notes":"REFERENCE LIST:[Schober, H.J. (1979) Astron. Astrophys. Suppl. Ser. 38, 91-99.], [Harris, A.W.; Young, J.W.; Dockweiler, T.; Gibson, J.; et al. (1992) Icarus 95, 115-147.], [Chiorny, V.G.; Shevchenko, V.G.; Krugly, Yu.N.; Velichko, F.P.; Gaftonyuk, N.M. (2003) Abstracts of Photometry and Polarimetry of Asteroids: Impact on Collaboration, Kharkiv, 9-10.], [Chiorny, V.G.; Shevchenko, V.G.; Krugly, Yu.N.; Velichko, F.P.; Gaftonyuk, N.M. (2007) Planet. Space Sci. 55, 986-997.], [Marciniak, A.; Pilcher, F.; Oszkiewicz, D.; Santana-Ros, T.; et al. (2015) Planet. Space Sci. 118, 256-266.], [Behrend, R. (2017) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html], [Devogele, M.; Tanga, P.; Bendjoya, P.; Rivet, J.P.; et al. (2017) Astron. Astrophys. 607, id. A119. arXiv:1707.07503.], [Hanus, J.; Viikinkoski, M.; Marchis, F.; Durech, J.; et al (2017) Astron. Astrophys. 601, A114.], [Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2020) Ap. J. Supl. Ser. 247, id.26.]","name":"rot_per","desc":"body rotation period (synodic)"},{"title":"geometric albedo","ref":"IRAS-A-FPA-3-RDR-IMPS-V6.0","value":"0.1900","units":null,"name":"albedo","sigma":"0.011","notes":"IRAS observations used: 6","desc":"geometric albedo"},{"units":null,"value":"0.881","title":"B-V","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2","desc":"color index B-V magnitude difference","name":"BV","sigma":"0.021","notes":"#obs=6; phase (min.=7.56, mean=16.93, max.=23.25) deg."},{"units":null,"value":"0.449","title":"U-B","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2","desc":"color index U-B magnitude difference","notes":"#obs=5; phase (min.=7.56, mean=15.66, max.=22.65) deg.","sigma":"0.030","name":"UB"},{"name":"spec_T","notes":"used 7 color indices","sigma":null,"desc":"Tholen spectral taxonomic classification","value":"S","title":"Tholen spectral type","ref":"EAR-A-5-DDR-TAXONOMY-V4.0","units":null},{"name":"spec_B","sigma":null,"notes":"based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)","desc":"SMASSII spectral taxonomic classification","value":"L","ref":"EAR-A-5-DDR-TAXONOMY-V4.0","title":"SMASSII spectral type","units":null}]}