{"object":{"prefix":null,"des":"393","pha":false,"orbit_id":"146","orbit_class":{"code":"MBA","name":"Main-belt Asteroid"},"shortname":"393 Lampetia","kind":"an","fullname":"393 Lampetia (A894 VC)","neo":false,"spkid":"20000393"},"orbit":{"orbit_id":"146","n_obs_used":6505,"comment":null,"cov_epoch":"2457896.5","n_dop_obs_used":0,"n_del_obs_used":1,"two_body":null,"equinox":"J2000","source":"JPL","soln_date":"2026-06-05 03:32:47","sb_used":"SB441-N16","t_jup":"3.204","pe_used":"DE441","moid":"0.906","epoch":"2461200.5","elements":[{"label":"e","title":"eccentricity","units":null,"sigma":"1.2e-09","value":"0.334","name":"e"},{"units":"au","label":"a","title":"semi-major axis","name":"a","sigma":"1.3e-09","value":"2.78"},{"name":"q","value":"1.85","sigma":"3.6e-09","units":"au","label":"q","title":"perihelion distance"},{"units":"deg","label":"i","title":"inclination; angle with respect to x-y ecliptic plane","name":"i","sigma":"1e-07","value":"14.8"},{"label":"node","title":"longitude of the ascending node","units":"deg","value":"212","sigma":"4.5e-07","name":"om"},{"name":"w","sigma":"5e-07","value":"91.7","units":"deg","title":"argument of perihelion","label":"peri"},{"name":"ma","sigma":"6e-07","value":"218","units":"deg","title":"mean anomaly","label":"M"},{"units":"TDB","label":"tp","title":"time of perihelion passage","name":"tp","sigma":"3.3e-06","value":"2461867.878"},{"name":"per","value":"1690","sigma":"1.2e-06","label":"period","title":"sidereal orbital period","units":"d"},{"units":"deg/d","title":"mean motion","label":"n","name":"n","sigma":"1.5e-10","value":"0.213"},{"units":"au","title":"aphelion distance","label":"Q","name":"ad","value":"3.71","sigma":"1.7e-09"}],"last_obs":"2026-04-13","not_valid_after":null,"moid_jup":"1.91","producer":"Otto Matic","model_pars":[],"not_valid_before":null,"data_arc":"44765","first_obs":"1903-09-21","rms":"0.29","condition_code":"0"},"signature":{"source":"NASA/JPL Small-Body Database (SBDB) API","version":"1.3"},"phys_par":[{"title":"absolute magnitude","units":null,"notes":"IRAS observations used: 7","desc":"absolute magnitude (magnitude at 1 au from Sun and observer)","sigma":null,"value":"8.37","name":"H","ref":"E2026E71"},{"name":"diameter","ref":"urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)","sigma":"27.770","value":"116.191","desc":"effective body diameter","units":"km","notes":null,"title":"diameter"},{"name":"rot_per","ref":"LCDB (Rev. 2023-October); Warner et al., 2009","value":"38.455","sigma":null,"desc":"body rotation period (synodic)","notes":"REFERENCE LIST:[Scaltriti, F.; Zappala, V.; Schober, H.J. (1979) Icarus 37, 133-141.], [Holliday, B. (2001) Minor Planet Bull. 28, 26-28.], [Pilcher, F.; Marciniak, A.; Oey, J. (2017) Minor Planet Bull. 44, 238.]","units":"h","title":"rotation period"},{"sigma":"0.014","value":"0.022","name":"albedo","ref":"urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)","title":"geometric albedo","units":null,"notes":null,"desc":"geometric albedo"},{"value":"0.740","sigma":"0.026","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2","name":"BV","title":"B-V","notes":"#obs=3; phase (min.=14.24, mean=16.70, max.=20.76) deg.","units":null,"desc":"color index B-V magnitude difference"},{"name":"UB","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2","sigma":"0.039","value":"0.324","desc":"color index U-B magnitude difference","title":"U-B","units":null,"notes":"#obs=2; phase (min.=14.24, mean=14.67, max.=15.10) deg."},{"name":"spec_T","ref":"EAR-A-5-DDR-TAXONOMY-V4.0","value":"C","sigma":null,"desc":"Tholen spectral taxonomic classification","notes":"used 2 color indices","units":null,"title":"Tholen spectral type"},{"desc":"SMASSII spectral taxonomic classification","title":"SMASSII spectral type","units":null,"notes":"based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)","ref":"EAR-A-5-DDR-TAXONOMY-V4.0","name":"spec_B","sigma":null,"value":"Xc"}]}