{"signature":{"version":"1.3","source":"NASA/JPL Small-Body Database (SBDB) API"},"object":{"orbit_id":"122","shortname":"247 Eukrate","des":"247","orbit_class":{"name":"Main-belt Asteroid","code":"MBA"},"spkid":"20000247","neo":false,"kind":"an","prefix":null,"pha":false,"fullname":"247 Eukrate (A885 EB)"},"phys_par":[{"sigma":null,"units":null,"ref":"E2026L10","title":"absolute magnitude","value":"8.14","notes":"IRAS observations used: 17","desc":"absolute magnitude (magnitude at 1 au from Sun and observer)","name":"H"},{"desc":"effective body diameter","name":"diameter","units":"km","sigma":"0.505","title":"diameter","ref":"urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)","value":"130.935","notes":null},{"name":"rot_per","desc":"body rotation period (synodic)","title":"rotation period","ref":"LCDB (Rev. 2023-October); Warner et al., 2009","sigma":null,"units":"h","notes":"REFERENCE LIST:[Schober, H.J.; Surdej, J. (1979) Astron. Astrophys. Suppl. Ser. 38, 269-274.], [Harris, A.W.; Young, J.W. (1980) Icarus 43, 20-32.], [Pilcher, F.; Delos, S.; Ahrendts, G.; Barker, T. (2012) Minor Planet Bull. 39, 204.], [Garlitz, J. (2013) Posting on CALL web site. https://minplanobs.org/MPInfo/php/call.php], [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.]","value":"12.093"},{"name":"albedo","desc":"geometric albedo","notes":null,"value":"0.064","ref":"urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)","title":"geometric albedo","units":null,"sigma":"0.012"},{"units":null,"sigma":"0.014","title":"B-V","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2","value":"0.691","notes":"#obs=6; phase (min.=6.51, mean=10.88, max.=18.92) deg.","desc":"color index B-V magnitude difference","name":"BV"},{"name":"UB","desc":"color index U-B magnitude difference","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2","title":"U-B","units":null,"sigma":"0.040","notes":"#obs=5; phase (min.=6.51, mean=10.01, max.=18.92) deg.","value":"0.295"},{"desc":"Tholen spectral taxonomic classification","name":"spec_T","units":null,"sigma":null,"ref":"EAR-A-5-DDR-TAXONOMY-V4.0","title":"Tholen spectral type","value":"CP","notes":"used 2 color indices; used ground-based radiometric albedo"},{"value":"Xc","notes":"based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)","units":null,"sigma":null,"ref":"EAR-A-5-DDR-TAXONOMY-V4.0","title":"SMASSII spectral type","desc":"SMASSII spectral taxonomic classification","name":"spec_B"}],"orbit":{"condition_code":"0","n_del_obs_used":null,"sb_used":"SB441-N16","t_jup":"3.175","source":"JPL","first_obs":"1885-03-16","n_obs_used":4857,"not_valid_after":null,"equinox":"J2000","rms":"0.39","moid_jup":"2.34","last_obs":"2026-04-10","elements":[{"label":"e","name":"e","title":"eccentricity","sigma":"1.5e-09","units":null,"value":"0.246"},{"label":"a","name":"a","value":"2.74","title":"semi-major axis","sigma":"1.7e-09","units":"au"},{"title":"perihelion distance","units":"au","sigma":"4.8e-09","value":"2.06","label":"q","name":"q"},{"units":"deg","sigma":"1.1e-07","title":"inclination; angle with respect to x-y ecliptic plane","value":"25","label":"i","name":"i"},{"label":"node","name":"om","value":"0.0146","units":"deg","sigma":"2.6e-07","title":"longitude of the ascending node"},{"name":"w","label":"peri","title":"argument of perihelion","units":"deg","sigma":"3.9e-07","value":"55.3"},{"units":"deg","sigma":"8e-07","title":"mean anomaly","value":"138","name":"ma","label":"M"},{"sigma":"3.2e-06","units":"TDB","title":"time of perihelion passage","value":"2460567.484","name":"tp","label":"tp"},{"label":"period","name":"per","title":"sidereal orbital period","sigma":"1.5e-06","units":"d","value":"1660"},{"title":"mean motion","sigma":"2e-10","units":"deg/d","value":"0.217","name":"n","label":"n"},{"label":"Q","name":"ad","value":"3.41","sigma":"2.1e-09","units":"au","title":"aphelion distance"}],"soln_date":"2026-06-05 03:20:47","data_arc":"51524","not_valid_before":null,"model_pars":[],"epoch":"2461200.5","moid":"1.15","comment":null,"cov_epoch":"2457608.5","producer":"Otto Matic","n_dop_obs_used":null,"two_body":null,"orbit_id":"122","pe_used":"DE441"}}
