{"object":{"fullname":"41 Daphne (A856 KA)","orbit_class":{"code":"MBA","name":"Main-belt Asteroid"},"pha":false,"prefix":null,"orbit_id":"169","kind":"an","des":"41","shortname":"41 Daphne","neo":false,"spkid":"20000041"},"signature":{"source":"NASA/JPL Small-Body Database (SBDB) API","version":"1.3"},"orbit":{"n_dop_obs_used":null,"not_valid_before":null,"t_jup":"3.232","last_obs":"2026-04-13","model_pars":[],"data_arc":"58348","cov_epoch":"2458011.5","n_obs_used":8160,"two_body":null,"moid":"1.05","source":"JPL","equinox":"J2000","pe_used":"DE441","epoch":"2461200.5","sb_used":"SB441-N16","first_obs":"1866-07-13","not_valid_after":null,"rms":"0.3","condition_code":"0","elements":[{"value":"0.27","name":"e","title":"eccentricity","label":"e","sigma":"2e-09","units":null},{"value":"2.77","title":"semi-major axis","name":"a","sigma":"1.5e-09","units":"au","label":"a"},{"label":"q","sigma":"5.5e-09","units":"au","value":"2.02","title":"perihelion distance","name":"q"},{"value":"15.7","name":"i","title":"inclination; angle with respect to x-y ecliptic plane","label":"i","sigma":"1.8e-07","units":"deg"},{"value":"178","name":"om","title":"longitude of the ascending node","sigma":"6.1e-07","units":"deg","label":"node"},{"name":"w","title":"argument of perihelion","value":"47","label":"peri","units":"deg","sigma":"7.2e-07"},{"name":"ma","title":"mean anomaly","value":"331","label":"M","units":"deg","sigma":"8e-07"},{"sigma":"3.8e-06","units":"TDB","label":"tp","value":"2461335.231","name":"tp","title":"time of perihelion passage"},{"units":"d","sigma":"1.4e-06","label":"period","title":"sidereal orbital period","name":"per","value":"1680"},{"value":"0.214","name":"n","title":"mean motion","sigma":"1.7e-10","units":"deg/d","label":"n"},{"title":"aphelion distance","name":"ad","value":"3.52","units":"au","sigma":"1.9e-09","label":"Q"}],"moid_jup":"1.58","comment":null,"n_del_obs_used":null,"orbit_id":"169","producer":"Otto Matic","soln_date":"2026-06-05 03:04:51"},"phys_par":[{"desc":"absolute magnitude (magnitude at 1 au from Sun and observer)","ref":"E2025G83","value":"7.58","name":"H","notes":"IRAS observations used: 8","title":"absolute magnitude","sigma":null,"units":null},{"title":"magnitude slope","units":null,"sigma":null,"name":"G","ref":"PDS3 (MPC 17257)","value":"0.10","desc":"magnitude slope parameter used in the standard asteroid H/G magnitude law","notes":"Fit"},{"sigma":"1.881","units":"km","title":"diameter","notes":null,"value":"205.495","ref":"urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)","name":"diameter","desc":"effective body diameter"},{"notes":"REFERENCE LIST:[Scaltriti, F.; Zappala, V. (1977) Astron. Astrophys. 56, 7-11.], [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.], [De Angelis, G. (1995) Planet. Space Sci. 43, 649-682.], [Behrend, R. (2001) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html], [Kaasalainen, M.; Torppa, J.; Piironen, J. (2002) Astron. Astrophys. 383, L19-L22.], [Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.], [Behrend, R. (2012) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html], [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.], [Hanus, J.; Viikinkoski, M.; Marchis, F.; Durech, J.; et al (2017) Astron. Astrophys. 601, A114.], [Carry, B.; Vachier, F.; Berthier, J.; Marsset, M.; et al. (2018) Astron. Astrophys, submitted.], [Ferrais, M.; Jehin, E.; Manfroid, J.; Moulane, Y.; et al. (2019) Minor Planet Bull. 46, 278-279.], [Martikainen, J.; Muinonen, K.; Penttila, A.; Cellino, A.; Wang, X.-B. (2021) Astron. Astrophys. 649, A98.], [Vernazza, P.; Ferrais, M.; Jorda, L.; Hanus, J.; et al. (2021) Astron. Astrophys 654, id. A56.]","value":"5.988","ref":"LCDB (Rev. 2023-October); Warner et al., 2009","name":"rot_per","desc":"body rotation period (synodic)","sigma":null,"units":"h","title":"rotation period"},{"sigma":"0.007","units":null,"title":"geometric albedo","notes":null,"desc":"geometric albedo","value":"0.059","ref":"urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)","name":"albedo"},{"sigma":"0.008","units":null,"title":"B-V","notes":"#obs=12; phase (min.=5.79, mean=17.09, max.=25.76) deg.","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2","value":"0.726","name":"BV","desc":"color index B-V magnitude difference"},{"desc":"color index U-B magnitude difference","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2","value":"0.363","name":"UB","notes":"#obs=5; phase (min.=13.37, mean=16.59, max.=19.71) deg.","title":"U-B","sigma":"0.017","units":null},{"sigma":null,"units":null,"title":"Tholen spectral type","notes":"used 7 color indices; used ground-based radiometric albedo","ref":"EAR-A-5-DDR-TAXONOMY-V4.0","value":"C","name":"spec_T","desc":"Tholen spectral taxonomic classification"},{"notes":"based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)","desc":"SMASSII spectral taxonomic classification","value":"Ch","ref":"EAR-A-5-DDR-TAXONOMY-V4.0","name":"spec_B","sigma":null,"units":null,"title":"SMASSII spectral type"}]}