{"signature":{"version":"1.3","source":"NASA/JPL Small-Body Database (SBDB) API"},"object":{"orbit_id":"179","kind":"an","orbit_class":{"name":"Main-belt Asteroid","code":"MBA"},"fullname":"704 Interamnia (A910 TC)","neo":false,"des":"704","prefix":null,"pha":false,"shortname":"704 Interamnia","spkid":"20000704"},"orbit":{"equinox":"J2000","epoch":"2461200.5","data_arc":"42163","n_dop_obs_used":null,"n_del_obs_used":null,"elements":[{"label":"e","units":null,"sigma":"2.1e-09","title":"eccentricity","name":"e","value":"0.155"},{"value":"3.06","name":"a","title":"semi-major axis","sigma":"2.4e-09","units":"au","label":"a"},{"units":"au","label":"q","name":"q","value":"2.58","title":"perihelion distance","sigma":"5.6e-09"},{"value":"17.3","name":"i","title":"inclination; angle with respect to x-y ecliptic plane","sigma":"2.2e-07","units":"deg","label":"i"},{"label":"node","units":"deg","sigma":"6.3e-07","title":"longitude of the ascending node","name":"om","value":"280"},{"label":"peri","units":"deg","sigma":"1.1e-06","title":"argument of perihelion","name":"w","value":"94.1"},{"label":"M","units":"deg","sigma":"1.3e-06","title":"mean anomaly","value":"221","name":"ma"},{"sigma":"7.7e-06","name":"tp","value":"2461953.441","title":"time of perihelion passage","label":"tp","units":"TDB"},{"sigma":"2.3e-06","title":"sidereal orbital period","value":"1950","name":"per","label":"period","units":"d"},{"sigma":"2.2e-10","title":"mean motion","value":"0.184","name":"n","label":"n","units":"deg/d"},{"title":"aphelion distance","name":"ad","value":"3.53","sigma":"2.8e-09","units":"au","label":"Q"}],"condition_code":"0","soln_date":"2026-06-05 03:56:56","moid_jup":"2.16","comment":null,"t_jup":"3.148","not_valid_before":null,"model_pars":[],"rms":"0.35","sb_used":"SB441-N16","cov_epoch":"2458017.5","last_obs":"2026-03-17","not_valid_after":null,"source":"JPL","producer":"Otto Matic","n_obs_used":8225,"first_obs":"1910-10-09","two_body":null,"orbit_id":"179","moid":"1.65","pe_used":"DE441"},"phys_par":[{"value":"6.34","title":"absolute magnitude","ref":"E2026-EA1","units":null,"name":"H","notes":"IRAS observations used: 28","sigma":null,"desc":"absolute magnitude (magnitude at 1 au from Sun and observer)"},{"name":"G","notes":"Fit","sigma":null,"desc":"magnitude slope parameter used in the standard asteroid H/G magnitude law","value":"-0.02","ref":"PDS3 (MPC 17259)","title":"magnitude slope","units":null},{"desc":"effective body diameter","name":"diameter","sigma":"1.031","notes":null,"units":"km","title":"diameter","ref":"urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)","value":"306.313"},{"ref":"Landgraf, IAU Symposium #152, 1992","title":"GM","value":"5.","units":"km^3/s^2","notes":null,"sigma":null,"name":"GM","desc":"standard gravitational parameter: product of the mass (M) and gravitational constant (G)"},{"name":"rot_per","sigma":null,"notes":"REFERENCE LIST:[Tempesti, P. (1975) Mem. Soc. Astron. Ital. 46, 397-405.], [Lustig, G.; Hahn, G. (1976) Acta Physica Austriaca 44, 199-205.], [Michalowski, T.; Velichko, F.P.; Di Martino, M.; Krugly, et al. (1995) Icarus 118, 292-301.], [Behrend, R. (2003) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html], [Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html], [Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html], [Hamanowa, H.; Hamanowa, H. (2011) http://www2.ocn.ne.jp/~hamaten/astlcdata.htm], [Behrend, R. (2012) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html], [Sato, I.; Buie, M.; Maley, P.D.; Hamanowa, H.; et al. (2014) Intl. Journ. Astron. Astrophys. 4, 91-118.], [Behrend, R. (2017) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html], [Warner, B.D. (2018) Minor Planet Bull. 45, 39-45.], [Hanus, J.; Vernazza, P.; Viikinkoski, M.; Ferrais, M.; et al. (2020) Astron. Astrophys. 633, A65.], [Vernazza, P.; Ferrais, M.; Jorda, L.; Hanus, J.; et al. (2021) Astron. Astrophys 654, id. A56.], [Ferrais, M.; Vernazza, P.; Jorda, L.; Jehin, E.; et al. (2022) Minor Planet Bull. 49, 307-313.]","desc":"body rotation period (synodic)","value":"8.727","title":"rotation period","ref":"LCDB (Rev. 2023-October); Warner et al., 2009","units":"h"},{"ref":"urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)","title":"geometric albedo","value":"0.078","units":null,"notes":null,"sigma":"0.014","name":"albedo","desc":"geometric albedo"},{"desc":"color index B-V magnitude difference","name":"BV","notes":"#obs=11; phase (min.=1.61, mean=13.90, max.=22.24) deg.","sigma":"0.014","units":null,"value":"0.645","title":"B-V","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2"},{"units":null,"ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2","title":"U-B","value":"0.259","desc":"color index U-B magnitude difference","name":"UB","sigma":"0.021","notes":"#obs=10; phase (min.=1.61, mean=13.78, max.=22.24) deg."},{"name":"spec_T","sigma":null,"notes":"used 7 color indices; used ground-based radiometric albedo","desc":"Tholen spectral taxonomic classification","value":"F","ref":"EAR-A-5-DDR-TAXONOMY-V4.0","title":"Tholen spectral type","units":null},{"units":null,"title":"SMASSII spectral type","ref":"EAR-A-5-DDR-TAXONOMY-V4.0","value":"B","desc":"SMASSII spectral taxonomic classification","name":"spec_B","notes":"based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)","sigma":null}]}