{"phys_par":[{"units":null,"sigma":null,"title":"absolute magnitude","ref":"MPO980523","value":"8.04","notes":"IRAS observations used: 20","desc":"absolute magnitude (magnitude at 1 au from Sun and observer)","name":"H"},{"desc":"effective body diameter","name":"diameter","value":"151.116","notes":null,"sigma":"1.596","units":"km","ref":"urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)","title":"diameter"},{"sigma":null,"units":"h","ref":"LCDB (Rev. 2023-October); Warner et al., 2009","title":"rotation period","value":"20.991","notes":"REFERENCE LIST:[Goguen, J.; Veverka, J.; Elliot, J.L.; Church, C. (1976) Icarus 29, 137-142.], [Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R.; Greenberg, R.; et al. (1990) Icarus 86, 402-447.], [Harris, A.W.; Young, J.W.; Bowell, E.; Tholen, D.J. (1999) Icarus 142, 173-201.], [Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html], [Durech, J.; Tonry, J.; Erasmus, N.; Denneau, L.; et al. (2020) Astron. Astrophys. 643, A59.]","desc":"body rotation period (synodic)","name":"rot_per"},{"name":"albedo","desc":"geometric albedo","title":"geometric albedo","ref":"urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)","units":null,"sigma":"0.015","notes":null,"value":"0.052"},{"units":null,"sigma":"0.020","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2","title":"B-V","value":"0.693","notes":"#obs=5; phase (min.=9.17, mean=10.05, max.=10.89) deg.","desc":"color index B-V magnitude difference","name":"BV"},{"units":null,"sigma":"0.013","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2","title":"U-B","value":"0.287","notes":"#obs=5; phase (min.=9.17, mean=10.05, max.=10.89) deg.","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":"CP","notes":"used 2 color indices; used ground-based radiometric albedo"},{"name":"spec_B","desc":"SMASSII spectral taxonomic classification","title":"SMASSII spectral type","ref":"EAR-A-5-DDR-TAXONOMY-V4.0","units":null,"sigma":null,"notes":"based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)","value":"X"}],"orbit":{"first_obs":"1881-03-28","n_obs_used":9304,"not_valid_after":null,"equinox":"J2000","rms":"0.28","moid_jup":"1.71","last_obs":"2026-04-05","condition_code":"0","n_del_obs_used":null,"sb_used":"SB441-N16","t_jup":"3.284","source":"JPL","comment":null,"cov_epoch":"2458010.5","producer":"Otto Matic","n_dop_obs_used":null,"two_body":null,"orbit_id":"140","pe_used":"DE441","elements":[{"name":"e","label":"e","units":null,"sigma":"2.4e-09","title":"eccentricity","value":"0.17"},{"name":"a","label":"a","value":"2.79","sigma":"2e-09","units":"au","title":"semi-major axis"},{"label":"q","name":"q","value":"2.31","sigma":"7.3e-09","units":"au","title":"perihelion distance"},{"units":"deg","sigma":"2.1e-07","title":"inclination; angle with respect to x-y ecliptic plane","value":"10.9","label":"i","name":"i"},{"name":"om","label":"node","value":"1.66","units":"deg","sigma":"1.2e-06","title":"longitude of the ascending node"},{"label":"peri","name":"w","sigma":"1.5e-06","units":"deg","title":"argument of perihelion","value":"167"},{"name":"ma","label":"M","value":"102","title":"mean anomaly","sigma":"1.1e-06","units":"deg"},{"label":"tp","name":"tp","value":"2460717.962","sigma":"4.8e-06","units":"TDB","title":"time of perihelion passage"},{"value":"1700","title":"sidereal orbital period","units":"d","sigma":"1.8e-06","label":"period","name":"per"},{"sigma":"2.3e-10","units":"deg/d","title":"mean motion","value":"0.212","name":"n","label":"n"},{"label":"Q","name":"ad","value":"3.26","title":"aphelion distance","sigma":"2.4e-09","units":"au"}],"soln_date":"2026-06-05 03:11:58","data_arc":"52968","not_valid_before":null,"epoch":"2461200.5","model_pars":[],"moid":"1.32"},"object":{"neo":false,"kind":"an","spkid":"20000139","orbit_class":{"code":"MBA","name":"Main-belt Asteroid"},"shortname":"139 Juewa","orbit_id":"140","des":"139","fullname":"139 Juewa (A874 TA)","prefix":null,"pha":false},"signature":{"version":"1.3","source":"NASA/JPL Small-Body Database (SBDB) API"}}
