{"object":{"fullname":"16 Psyche (A852 FA)","orbit_class":{"name":"Main-belt Asteroid","code":"MBA"},"prefix":null,"pha":false,"kind":"an","orbit_id":"92","shortname":"16 Psyche","des":"16","spkid":"20000016","neo":false},"signature":{"source":"NASA/JPL Small-Body Database (SBDB) API","version":"1.3"},"phys_par":[{"desc":"absolute magnitude (magnitude at 1 au from Sun and observer)","value":"6.20","ref":"E2024-XU9","name":"H","notes":"IRAS observations used: 32","title":"absolute magnitude","sigma":null,"units":null},{"notes":"Fit","desc":"magnitude slope parameter used in the standard asteroid H/G magnitude law","value":"0.20","ref":"PDS3 (MPC 17257)","name":"G","sigma":null,"units":null,"title":"magnitude slope"},{"title":"diameter","units":"km","sigma":"-1/+4","desc":"effective body diameter","name":"diameter","value":"222","ref":"Shepard et al. (2021), The Planetary Science Journal 2, 125","notes":null},{"notes":null,"desc":"tri(or bi)-axial body dimensions","ref":"Shepard et al. 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Astrophys. 6, 57-59 (1982, 1982ChA...6...57Z).], [Lupishko, D.F.; Bel'skaya, I.N.; Tupieva, F.A.; Chernova, G.P. (1982) Astron. Vestn. 16, 101-108; Solar System Res. 16, 75-80.], [Zhou, X.-z.; Yang, X.-y.; Wu, Z.-x. (1982) Acta Astron. Sin. 23, 349-352; Chin. Astron. Astrophys. 7, 129-131 (1983, 1983ChA...7..129Z).], [Lupishko, D.F.; Bel'skaya, I.N. (1983) in Asteroids, Comets, Meteors. C.-I. Lagerkvist, H. Rickman, eds. Uppsala, pp. 55-61.], [Tedesco, E.F.; Taylor, R.C.; Drummond, J.; Harwood, D.; et al. (1983) Icarus 54, 30-37.], [Tedesco, E.F.; Taylor, R.C. (1985) Icarus 61, 2, 241-251.], [Magnusson, P. (1986) Icarus 68, 1-39.], [Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R.; Greenberg, R.; et al. (1987) Icarus 70, 191-245.], [Drummond, J.D.; Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R. (1988) Icarus 76, 19-77.], [Magnusson, P. (1990) Icarus 85, 229-240.], [Drummond, J.D.; Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R. (1991) Icarus 89, 44-64.], [Broglia, P.; Manara, A. (1992) Astron. Astrophys. 257, 770-772.], [De Angelis, G. (1993) Planet. Space Sci. 41, 285-290.], [Piironen, J.; Magnusson, P.; Lagerkvist, C.-I.; Williams, I.P.; et al. (1997) Astron. Astrophys. Suppl. Ser. 121, 489-497.], [Kaasalainen, M.; Torppa, J.; Piironen, J. (2002) Icarus 159, 369-395.], [Behrend, R. (2003) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html], [Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.], [Proyecto ECLA (Silvia Alonso Perez) (2011) http://www.geocities.com/proyectoecla/], [Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.], [Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.], [Warner, B.D. (2016) Minor Planet Bull. 43, 137-140.], [Hanus, J.; Viikinkoski, M.; Marchis, F.; Durech, J.; et al (2017) Astron. Astrophys. 601, A114.], [Drummond, J.D.; Merline, W.J.; Carry, B.; Conrad, A.; et al. (2018) Icarus 305, 174-185.], [Viikinkoski, M.; Vernazza, P.; Hanus, J.; Le Coroller, H.; et al. (2018) Astron. Astrophys. 619, L3.], [Ferrais, M.; Vernazz, P.; Jorda, L.; Rambaux, N.; et al. (2020) Astorn. Astrophys. 638, L15.], [Shepard, M.K.; de Kleer, K.; Cambioni, S.; Tayler, P.A.; et al. (2021) Plan. Sci. J. 2, id. 125.], [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)","name":"rot_per","value":"4.196","ref":"LCDB (Rev. 2023-October); Warner et al., 2009"},{"desc":"geometric albedo","ref":"IRAS-A-FPA-3-RDR-IMPS-V6.0","value":"0.1203","name":"albedo","notes":"IRAS observations used: 32","title":"geometric albedo","sigma":"0.004","units":null},{"notes":"#obs=7; phase (min.=.95, mean=9.89, max.=21.42) deg.","desc":"color index B-V magnitude difference","name":"BV","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2","value":"0.729","units":null,"sigma":"0.023","title":"B-V"},{"title":"U-B","sigma":"0.058","units":null,"desc":"color index U-B magnitude difference","value":"0.299","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2","name":"UB","notes":"#obs=71; phase (min.=.95, mean=9.30, max.=21.42) deg."},{"notes":"used 7 color indices; used ground-based radiometric albedo","name":"spec_T","value":"M","ref":"EAR-A-5-DDR-TAXONOMY-V4.0","desc":"Tholen spectral taxonomic classification","units":null,"sigma":null,"title":"Tholen spectral type"},{"desc":"SMASSII spectral taxonomic classification","ref":"EAR-A-5-DDR-TAXONOMY-V4.0","value":"X","name":"spec_B","notes":"based on a high-resolution spectrum by Xu et al. 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