{"phys_par":[{"name":"H","sigma":null,"desc":"absolute magnitude (magnitude at 1 au from Sun and observer)","notes":"IRAS observations used: 36","units":null,"ref":"MPO964273","title":"absolute magnitude","value":"8.57"},{"units":null,"title":"magnitude slope","ref":"PDS3 (MPC 17259)","value":"-0.06","name":"G","sigma":null,"desc":"magnitude slope parameter used in the standard asteroid H/G magnitude law","notes":"Fit"},{"name":"diameter","notes":null,"desc":"effective body diameter","sigma":"0.494","ref":"urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)","title":"diameter","units":"km","value":"107.227"},{"sigma":null,"desc":"body rotation period (synodic)","notes":"REFERENCE LIST:[Wang, X.-b.; Gu, S.-h.; Li, X.-j. (2010) Earth, Moon, and Planets 106, 97-104.], [Pilcher, F. (2015) Minor Planet Bull. 42, 280-281.]","name":"rot_per","value":"28.479","units":"h","ref":"LCDB (Rev. 2023-October); Warner et al., 2009","title":"rotation period"},{"name":"albedo","notes":null,"desc":"geometric albedo","sigma":"0.014","ref":"urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)","title":"geometric albedo","units":null,"value":"0.073"},{"units":null,"title":"B-V","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2","value":"0.712","name":"BV","sigma":"0.015","desc":"color index B-V magnitude difference","notes":"#obs=5; phase (min.=8.37, mean=16.47, max.=24.99) deg."},{"title":"U-B","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2","units":null,"value":"0.341","name":"UB","desc":"color index U-B magnitude difference","notes":"#obs=4; phase (min.=8.37, mean=14.34, max.=17.58) deg.","sigma":"0.030"},{"ref":"EAR-A-5-DDR-TAXONOMY-V4.0","title":"Tholen spectral type","units":null,"value":"C","name":"spec_T","desc":"Tholen spectral taxonomic classification","notes":"used 7 color indices","sigma":null},{"name":"spec_B","sigma":null,"desc":"SMASSII spectral taxonomic classification","notes":"based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)","units":null,"title":"SMASSII spectral type","ref":"EAR-A-5-DDR-TAXONOMY-V4.0","value":"Ch"}],"orbit":{"n_obs_used":7384,"cov_epoch":"2457726.5","moid_jup":"1.94","two_body":null,"first_obs":"1904-01-10","data_arc":"44571","model_pars":[],"soln_date":"2026-06-05 03:42:27","orbit_id":"128","moid":"1","equinox":"J2000","n_del_obs_used":null,"pe_used":"DE441","t_jup":"3.268","not_valid_before":null,"condition_code":"0","epoch":"2461200.5","source":"JPL","producer":"Otto Matic","last_obs":"2026-01-20","elements":[{"title":"eccentricity","name":"e","units":null,"value":"0.278","label":"e","sigma":"1.4e-09"},{"name":"a","title":"semi-major axis","units":"au","sigma":"1.8e-09","label":"a","value":"2.74"},{"value":"1.98","label":"q","sigma":"3.4e-09","units":"au","title":"perihelion distance","name":"q"},{"units":"deg","name":"i","title":"inclination; angle with respect to x-y ecliptic plane","sigma":"7.6e-08","label":"i","value":"10.6"},{"name":"om","title":"longitude of the ascending node","units":"deg","sigma":"4.7e-07","value":"89.6","label":"node"},{"title":"argument of perihelion","name":"w","units":"deg","label":"peri","value":"316","sigma":"5e-07"},{"units":"deg","name":"ma","title":"mean anomaly","sigma":"8e-07","label":"M","value":"9.72"},{"units":"TDB","title":"time of perihelion passage","name":"tp","label":"tp","value":"2461155.707","sigma":"3.6e-06"},{"title":"sidereal orbital period","name":"per","units":"d","value":"1660","label":"period","sigma":"1.7e-06"},{"value":"0.217","label":"n","sigma":"2.2e-10","title":"mean motion","name":"n","units":"deg/d"},{"units":"au","name":"ad","title":"aphelion distance","sigma":"2.3e-09","value":"3.51","label":"Q"}],"rms":"0.31","sb_used":"SB441-N16","not_valid_after":null,"n_dop_obs_used":null,"comment":null},"object":{"orbit_id":"128","des":"521","shortname":"521 Brixia","kind":"an","fullname":"521 Brixia (A904 AE)","orbit_class":{"code":"MBA","name":"Main-belt Asteroid"},"neo":false,"pha":false,"spkid":"20000521","prefix":null},"signature":{"version":"1.3","source":"NASA/JPL Small-Body Database (SBDB) API"}}
