{"phys_par":[{"name":"H","desc":"absolute magnitude (magnitude at 1 au from Sun and observer)","ref":"E2025L35","title":"absolute magnitude","sigma":null,"units":null,"notes":"IRAS observations used: 11","value":"6.79"},{"desc":"magnitude slope parameter used in the standard asteroid H/G magnitude law","name":"G","value":"0.21","notes":"Fit","sigma":null,"units":null,"ref":"PDS3 (MPC 17257)","title":"magnitude slope"},{"name":"diameter","desc":"effective body diameter","title":"diameter","ref":"urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)","sigma":"3.053","units":"km","notes":null,"value":"167.536"},{"desc":"standard gravitational parameter: product of the mass (M) and gravitational constant (G)","name":"GM","sigma":"0.05","units":"km^3/s^2","title":"GM","ref":"Margot & Brown, Science 300,  1939-1942 (2003)","value":"0.491","notes":"Low density M-type (chondritic) confirmed as binary system in 2001."},{"name":"density","desc":"bulk density","title":"bulk density","ref":"Margot & Brown, Science 300, 1939-1942 (2003)","sigma":"0.4","units":"g/cm^3","notes":null,"value":"2.37"},{"value":"4.1483","notes":"REFERENCE LIST:[Ahmad, I.I. 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Ser. 247, id.26.], [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.], [Stephens, R.D.; Warner, B.D. (2022) Minor Planet Bull. 49, 108-110.], [Behrend, R. (2023) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]","units":"h","sigma":null,"title":"rotation period","ref":"LCDB (Rev. 2023-October); Warner et al., 2009","desc":"body rotation period (synodic)","name":"rot_per"},{"name":"albedo","desc":"geometric albedo","notes":null,"value":"0.166","title":"geometric albedo","ref":"urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)","units":null,"sigma":"0.005"},{"desc":"color index B-V magnitude difference","name":"BV","value":"0.715","notes":"#obs=33; phase (min.=.44, mean=9.45, max.=21.85) deg.","units":null,"sigma":"0.023","title":"B-V","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2"},{"value":"0.234","notes":"#obs=16; phase (min.=.44, mean=5.30, max.=11.85) deg.","units":null,"sigma":"0.043","title":"U-B","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2","desc":"color index U-B magnitude difference","name":"UB"},{"desc":"Tholen spectral taxonomic classification","name":"spec_T","units":null,"sigma":null,"title":"Tholen spectral type","ref":"EAR-A-5-DDR-TAXONOMY-V4.0","value":"M","notes":"used 7 color indices; used ground-based radiometric albedo"},{"notes":"based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)","value":"X","title":"SMASSII spectral type","ref":"EAR-A-5-DDR-TAXONOMY-V4.0","sigma":null,"units":null,"name":"spec_B","desc":"SMASSII spectral taxonomic classification"}],"orbit":{"equinox":"J2000","rms":"0.27","moid_jup":"2.13","last_obs":"2026-01-19","not_valid_after":null,"n_obs_used":12455,"first_obs":"1854-04-14","t_jup":"3.234","source":"JPL","condition_code":"0","n_del_obs_used":null,"sb_used":"SB441-N16","orbit_id":"138","pe_used":"DE441","producer":"Otto Matic","n_dop_obs_used":null,"two_body":null,"comment":null,"cov_epoch":"2457864.5","model_pars":[],"epoch":"2461200.5","moid":"1.63","data_arc":"62737","not_valid_before":null,"elements":[{"value":"0.0988","units":null,"sigma":"3.1e-09","title":"eccentricity","name":"e","label":"e"},{"value":"2.91","sigma":"2.7e-09","units":"au","title":"semi-major axis","name":"a","label":"a"},{"label":"q","name":"q","sigma":"8.6e-09","units":"au","title":"perihelion distance","value":"2.62"},{"name":"i","label":"i","title":"inclination; angle with respect to x-y ecliptic plane","units":"deg","sigma":"3.1e-07","value":"13.7"},{"label":"node","name":"om","value":"66","sigma":"1.2e-06","units":"deg","title":"longitude of the ascending node"},{"value":"358","title":"argument of perihelion","sigma":"1.9e-06","units":"deg","name":"w","label":"peri"},{"title":"mean anomaly","sigma":"2.1e-06","units":"deg","value":"350","label":"M","name":"ma"},{"value":"2461249.191","title":"time of perihelion passage","units":"TDB","sigma":"1.1e-05","name":"tp","label":"tp"},{"name":"per","label":"period","title":"sidereal orbital period","sigma":"2.6e-06","units":"d","value":"1810"},{"name":"n","label":"n","value":"0.199","title":"mean motion","sigma":"2.8e-10","units":"deg/d"},{"label":"Q","name":"ad","title":"aphelion distance","units":"au","sigma":"3e-09","value":"3.2"}],"soln_date":"2026-06-05 03:03:26"},"object":{"pha":false,"prefix":null,"fullname":"22 Kalliope (A852 WA)","des":"22","shortname":"22 Kalliope","orbit_id":"138","orbit_class":{"name":"Main-belt Asteroid","code":"MBA"},"spkid":"20000022","kind":"an","neo":false},"signature":{"version":"1.3","source":"NASA/JPL Small-Body Database (SBDB) API"}}