{"phys_par":[{"title":"absolute magnitude","notes":null,"desc":"absolute magnitude (magnitude at 1 au from Sun and observer)","value":"8.56","ref":"E2026E71","name":"H","sigma":null,"units":null},{"title":"diameter","notes":null,"desc":"effective body diameter","value":"114.723","ref":"urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)","sigma":"3.276","name":"diameter","units":"km"},{"sigma":null,"name":"rot_per","units":"h","notes":"REFERENCE LIST:[Dotto, E.; Rotundi, A.; De Sanctis, M.C. (1992) in Physical Properties of Small Solar System Bodies. A. Brahic, J.-C. Gerard, J. Surdej, eds. Universite de Liege, Institut d'Astrophysique, Liege, p. 211.], [Piironen, J.; Bowell, E.; Erikson, A.; Magnusson, P. (1994) Astron. Astrophys. Suppl. Ser. 106, 587-595.], [Di Martino, M.; Dotto, E.; Celino, A.; Barucci, M.A.; Fulchignoni, M. (1995) Astron. Astrophys. Suppl. Ser. 112, 1-7.], [Wang, X.-B.; Shi, Y. (2002) Earth, Moon, and Planets 91, 181-186; Wang, X.-B. (2002) Proc. ACM 2002, ESA SP 500, 501-503.], [Pray, D. (2005) Minor Planet Bull. 32, 8-9.], [Sada, P.V. (2006) Minor Planet Bull. 33, 78-79.], [Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html], [Marciniak, A.; Michalowski, T.; Kaasalainen, M.; Durech, J.; et al. (2007) Astron. Astrophys. 473, 633-639.], [Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.], [Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.], [Alton, K.B. (2019) Minor Planet Bull. 46, 114-117.], [Behrend, R. (2021) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]","value":"6.315","title":"rotation period","desc":"body rotation period (synodic)","ref":"LCDB (Rev. 2023-October); Warner et al., 2009"},{"notes":null,"desc":"geometric albedo","value":"0.051","title":"geometric albedo","ref":"urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)","name":"albedo","sigma":"0.006","units":null},{"units":null,"sigma":"0.021","name":"BV","title":"B-V","notes":"#obs=6; phase (min.=3.50, mean=11.64, max.=17.42) deg.","value":"0.708","desc":"color index B-V magnitude difference","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2"},{"name":"UB","sigma":"0.029","units":null,"title":"U-B","notes":"#obs=5; phase (min.=3.50, mean=10.48, max.=17.33) deg.","value":"0.271","desc":"color index U-B magnitude difference","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2"},{"notes":"used 7 color indices","title":"Tholen spectral type","desc":"Tholen spectral taxonomic classification","value":"X","ref":"EAR-A-5-DDR-TAXONOMY-V4.0","units":null,"name":"spec_T","sigma":null}],"orbit":{"n_dop_obs_used":null,"n_obs_used":6611,"t_jup":"3.105","pe_used":"DE441","last_obs":"2026-04-14","elements":[{"value":"0.0612","title":"eccentricity","sigma":"1.3e-09","name":"e","label":"e","units":null},{"title":"semi-major axis","value":"3.12","units":"au","label":"a","sigma":"3.2e-09","name":"a"},{"value":"2.93","title":"perihelion distance","label":"q","units":"au","name":"q","sigma":"6e-09"},{"units":"deg","label":"i","name":"i","sigma":"8.7e-08","title":"inclination; angle with respect to x-y ecliptic plane","value":"21.7"},{"title":"longitude of the ascending node","value":"211","sigma":"2.3e-07","name":"om","label":"node","units":"deg"},{"label":"peri","units":"deg","sigma":"1.7e-06","name":"w","title":"argument of perihelion","value":"267"},{"value":"128","title":"mean anomaly","units":"deg","label":"M","sigma":"1.2e-06","name":"ma"},{"title":"time of perihelion passage","value":"2460486.758","sigma":"6.9e-06","name":"tp","label":"tp","units":"TDB"},{"units":"d","label":"period","name":"per","sigma":"3.1e-06","title":"sidereal orbital period","value":"2010"},{"sigma":"2.7e-10","name":"n","units":"deg/d","label":"n","title":"mean motion","value":"0.179"},{"title":"aphelion distance","value":"3.31","label":"Q","units":"au","name":"ad","sigma":"3.4e-09"}],"data_arc":"46855","orbit_id":"91","sb_used":"SB441-N16","source":"JPL","moid":"2.04","epoch":"2461200.5","equinox":"J2000","model_pars":[],"first_obs":"1897-12-31","moid_jup":"1.86","not_valid_before":null,"condition_code":"0","not_valid_after":null,"two_body":null,"soln_date":"2026-06-05 03:23:30","n_del_obs_used":null,"comment":null,"producer":"Otto Matic","rms":"0.33","cov_epoch":"2457765.5"},"signature":{"version":"1.3","source":"NASA/JPL Small-Body Database (SBDB) API"},"object":{"spkid":"20000276","kind":"an","prefix":null,"neo":false,"orbit_class":{"code":"MBA","name":"Main-belt Asteroid"},"pha":false,"orbit_id":"91","fullname":"276 Adelheid (A888 HA)","des":"276","shortname":"276 Adelheid"}}