{"object":{"neo":false,"des":"596","spkid":"20000596","shortname":"596 Scheila","orbit_class":{"code":"MBA","name":"Main-belt Asteroid"},"orbit_id":"119","fullname":"596 Scheila (A906 DL)","prefix":null,"kind":"an","pha":false},"signature":{"source":"NASA/JPL Small-Body Database (SBDB) API","version":"1.3"},"phys_par":[{"units":null,"name":"H","desc":"absolute magnitude (magnitude at 1 au from Sun and observer)","value":"8.92","notes":"IRAS observations used: 21","title":"absolute magnitude","ref":"E2026-EA1","sigma":null},{"notes":null,"value":"159.726","units":"km","name":"diameter","desc":"effective body diameter","sigma":"1.103","ref":"urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)","title":"diameter"},{"desc":"body rotation period (synodic)","units":"h","name":"rot_per","notes":"REFERENCE LIST:[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html], [Warner, B.D. (2006) Minor Planet Bull. 33, 58-62.], [Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html], [Ishiguro, M.; Hanayama, H.; Hasegawa, S.; Sarugaku, Y.; et al. (2011) Astrophys. J. Letters 740, L11.], [Warner, B.D. (2011) Minor Planet Bull. 38, 96-101.], [Husarik, M. (2012) Contr. Ast. Obs. Skalnat], [Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.], [Shevchenko, V.G.; Belksaya, I.N.; Muinon, K.; Penttila, A.; et al. (2016) Plan. Space Sci. 123, 101-116.], [Warner, B.D. (2017) Minor Planet Bull. 44, 289-294.], [Kokhirova, G.I.; Ivanova, O.V.; Rakhmatullaeva, F.Dzh.; et al. (2018) Solar System Research 52, 495-504.], [Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2020) Ap. J. Supl. Ser. 247, id.26.], [Martikainen, J.; Muinonen, K.; Penttila, A.; Cellino, A.; Wang, X.-B. (2021) Astron. Astrophys. 649, A98.], [Ferrais, M.; Vernazza, P.; Jorda, L.; Jehin, E.; et al. (2022) Minor Planet Bull. 49, 307-313.]","value":"15.848","title":"rotation period","sigma":null,"ref":"LCDB (Rev. 2023-October); Warner et al., 2009"},{"name":"albedo","units":null,"desc":"geometric albedo","notes":null,"value":"0.040","title":"geometric albedo","sigma":"0.001","ref":"urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)"},{"value":"0.714","notes":"#obs=2; phase (min.=5.96, mean=6.93, max.=7.91) deg.","desc":"color index B-V magnitude difference","name":"BV","units":null,"sigma":"0.033","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2","title":"B-V"},{"title":"U-B","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2","sigma":"0.039","desc":"color index U-B magnitude difference","name":"UB","units":null,"notes":"#obs=2; phase (min.=5.96, mean=6.93, max.=7.91) deg.","value":"0.177"},{"title":"Tholen spectral type","sigma":null,"ref":"EAR-A-5-DDR-TAXONOMY-V4.0","name":"spec_T","units":null,"desc":"Tholen spectral taxonomic classification","value":"PCD","notes":"used 2 color indices; used ground-based radiometric albedo"},{"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":"T","title":"SMASSII spectral type","sigma":null,"ref":"EAR-A-5-DDR-TAXONOMY-V4.0"}],"orbit":{"n_dop_obs_used":null,"rms":"0.29","moid":"1.45","producer":"Otto Matic","epoch":"2461200.5","not_valid_before":null,"soln_date":"2026-06-05 03:48:27","orbit_id":"119","last_obs":"2026-04-05","source":"JPL","equinox":"J2000","first_obs":"1906-02-22","elements":[{"sigma":"1.4e-09","value":"0.16","units":null,"name":"e","label":"e","title":"eccentricity"},{"sigma":"2.6e-09","value":"2.93","label":"a","title":"semi-major axis","units":"au","name":"a"},{"title":"perihelion distance","label":"q","units":"au","name":"q","value":"2.47","sigma":"3.5e-09"},{"title":"inclination; angle with respect to x-y ecliptic plane","label":"i","name":"i","units":"deg","value":"14.6","sigma":"9e-08"},{"sigma":"3.5e-07","value":"70.4","units":"deg","name":"om","label":"node","title":"longitude of the ascending node"},{"title":"argument of perihelion","label":"peri","units":"deg","name":"w","value":"178","sigma":"5.5e-07"},{"name":"ma","units":"deg","label":"M","title":"mean anomaly","value":"287","sigma":"8.4e-07"},{"sigma":"4.7e-06","value":"2461573.319","name":"tp","units":"TDB","title":"time of perihelion passage","label":"tp"},{"value":"1830","sigma":"2.4e-06","title":"sidereal orbital period","label":"period","name":"per","units":"d"},{"sigma":"2.6e-10","value":"0.196","units":"deg/d","name":"n","label":"n","title":"mean motion"},{"title":"aphelion distance","label":"Q","units":"au","name":"ad","value":"3.4","sigma":"3e-09"}],"n_del_obs_used":null,"two_body":null,"pe_used":"DE441","model_pars":[],"cov_epoch":"2457444.5","not_valid_after":null,"data_arc":"43872","n_obs_used":8940,"comment":null,"moid_jup":"1.63","condition_code":"0","t_jup":"3.208","sb_used":"SB441-N16"}}