{"signature":{"version":"1.3","source":"NASA/JPL Small-Body Database (SBDB) API"},"object":{"spkid":"20000003","fullname":"3 Juno (A804 RA)","orbit_id":"143","kind":"an","shortname":"3 Juno","neo":false,"prefix":null,"des":"3","orbit_class":{"code":"MBA","name":"Main-belt Asteroid"},"pha":false},"phys_par":[{"units":null,"notes":"IRAS observations used: 23","value":"5.19","title":"absolute magnitude","desc":"absolute magnitude (magnitude at 1 au from Sun and observer)","sigma":null,"ref":"E2025N01","name":"H"},{"name":"G","ref":"PDS3 (MPC 17257)","sigma":null,"desc":"magnitude slope parameter used in the standard asteroid H/G magnitude law","title":"magnitude slope","value":"0.32","units":null,"notes":"Fit"},{"title":"diameter","value":"246.596","notes":null,"units":"km","ref":"urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)","name":"diameter","sigma":"10.594","desc":"effective body diameter"},{"notes":"REFERENCE LIST:[Groeneveld, I.; Kuiper, G.P. (1954) Astrophys. J. 120, 529-546.], [Chang, Y.C.; Chang, C.-s. (1962) Acta Astron. Sin. 10, 101-111.], [Gehrels, T.; Owings, D. (1962) Astrophys. J. 135, 906-924.], [Schroll, A.; Schober, H.J.; Lagerkvist, C.-I. (1981) Astron. Astrophys. 104, 296-299.], [Magnusson, P. (1986) Icarus 68, 1-39.], [Di Martino, M.; Zappala, V.; De Sanctis, G.; Cacciatori, S. (1987) Icarus 69, 338-353.], [Lagerkvist, C.I.; Magnusson, P.; Williams, I.P.; Buontempo, M.E.; et al. (1988) Astron. Astrophys. Suppl. Ser. 73, 395-405.], [Birch, P.V.; Taylor, R.C. (1989) Astron. Astrophys. Suppl. Ser. 81, 409-414.], [Harris, A.W.; Young, J.W.; Bowell, E.; Martin, L.J.; et al. (1989) Icarus 77, 171-186.], [Erikson, A.; Magnusson, P. (1993) Icarus 103, 62-66.], [Dotto, E.; De Angelis, G.; Di Martino, M.; Barucci, M.A.; et al. (1995) Icarus 117, 313-327.], [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.], [Viikinkoski, M.; Kaasalainen, M.; Durecy, J.; Carry, B.; et al. (2015) Astron. Astrophys. 581, L3.], [Behrend, R. (2016) 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.], [Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2020) Ap. J. Supl. Ser. 247, id.26.], [Podlewska-Gaca, E.; Marciniak, A.; Ali-Lagoa, V.; Bartczak, P.; et al. (2020) Astron. Astrophys. 638, id A11.], [Behrend, R. (2021) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html], [Vernazza, P.; Ferrais, M.; Jorda, L.; Hanus, J.; et al. (2021) Astron. Astrophys 654, id. A56.], [Farfan, R.G.; de la Cuesta F.G.; Mananes, E.F.; Ribes, N.G.; et al. (2022) Minor Planet Bull. 49, 136-140.]","units":"h","value":"7.21","title":"rotation period","sigma":null,"desc":"body rotation period (synodic)","name":"rot_per","ref":"LCDB (Rev. 2023-October); Warner et al., 2009"},{"title":"geometric albedo","value":"0.214","units":null,"notes":null,"ref":"urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)","name":"albedo","sigma":"0.026","desc":"geometric albedo"},{"title":"B-V","value":"0.824","units":null,"notes":"#obs=19; phase (min.=7.79, mean=16.60, max.=25.79) deg.","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2","name":"BV","sigma":"0.024","desc":"color index B-V magnitude difference"},{"name":"UB","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2","sigma":"0.030","desc":"color index U-B magnitude difference","title":"U-B","value":"0.433","units":null,"notes":"#obs=18; phase (min.=7.79, mean=16.62, max.=25.79) deg."},{"title":"Tholen spectral type","notes":"used 7 color indices; used ground-based radiometric albedo","units":null,"value":"S","sigma":null,"desc":"Tholen spectral taxonomic classification","name":"spec_T","ref":"EAR-A-5-DDR-TAXONOMY-V4.0"},{"desc":"SMASSII spectral taxonomic classification","sigma":null,"name":"spec_B","ref":"EAR-A-5-DDR-TAXONOMY-V4.0","title":"SMASSII spectral type","units":null,"notes":"based on a high-resolution spectrum by Xu et al. 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