{"object":{"prefix":null,"pha":false,"orbit_id":"121","kind":"an","fullname":"804 Hispania (A915 FK)","orbit_class":{"name":"Main-belt Asteroid","code":"MBA"},"neo":false,"spkid":"20000804","des":"804","shortname":"804 Hispania"},"signature":{"source":"NASA/JPL Small-Body Database (SBDB) API","version":"1.3"},"orbit":{"soln_date":"2026-06-05 04:04:50","orbit_id":"121","producer":"Otto Matic","elements":[{"label":"e","units":null,"sigma":"2.5e-09","title":"eccentricity","name":"e","value":"0.142"},{"value":"2.84","title":"semi-major axis","name":"a","sigma":"3.2e-09","units":"au","label":"a"},{"sigma":"6e-09","units":"au","label":"q","value":"2.44","title":"perihelion distance","name":"q"},{"value":"15.4","name":"i","title":"inclination; angle with respect to x-y ecliptic plane","sigma":"1.8e-07","units":"deg","label":"i"},{"units":"deg","sigma":"6.2e-07","label":"node","name":"om","title":"longitude of the ascending node","value":"348"},{"label":"peri","sigma":"9.6e-07","units":"deg","value":"344","title":"argument of perihelion","name":"w"},{"value":"301","title":"mean anomaly","name":"ma","label":"M","sigma":"1.3e-06","units":"deg"},{"name":"tp","title":"time of perihelion passage","value":"2461488.114","units":"TDB","sigma":"6.8e-06","label":"tp"},{"value":"1750","name":"per","title":"sidereal orbital period","sigma":"3e-06","units":"d","label":"period"},{"name":"n","title":"mean motion","value":"0.206","label":"n","units":"deg/d","sigma":"3.5e-10"},{"units":"au","sigma":"3.7e-09","label":"Q","title":"aphelion distance","name":"ad","value":"3.24"}],"condition_code":"0","moid_jup":"2.15","comment":null,"n_del_obs_used":null,"rms":"0.3","not_valid_after":null,"sb_used":"SB441-N16","epoch":"2461200.5","pe_used":"DE441","first_obs":"1907-09-24","n_obs_used":7641,"two_body":null,"moid":"1.43","source":"JPL","equinox":"J2000","n_dop_obs_used":null,"not_valid_before":null,"last_obs":"2026-04-12","t_jup":"3.243","cov_epoch":"2457994.5","model_pars":[],"data_arc":"43300"},"phys_par":[{"units":null,"sigma":null,"title":"absolute magnitude","notes":"IRAS observations used: 16","desc":"absolute magnitude (magnitude at 1 au from Sun and observer)","name":"H","ref":"MPO980534","value":"7.98"},{"name":"G","value":"0.18","ref":"PDS3 (MPC 17260)","desc":"magnitude slope parameter used in the standard asteroid H/G magnitude law","notes":"Fit","title":"magnitude slope","units":null,"sigma":null},{"value":"137.952","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":null,"title":"diameter","sigma":"1.964","units":"km"},{"ref":"LCDB (Rev. 2023-October); Warner et al., 2009","value":"14.845","name":"rot_per","desc":"body rotation period (synodic)","notes":"REFERENCE LIST:[Harris, A.W.; Young, J.W. (1983) Icarus 54, 59-109.], [Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html], [Pray, D. (2004) Minor Planet Bull. 31, 34-36.], [Stephens, R.D. (2004) Minor Planet Bull. 31, 40-41.], [Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html], [Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html], [Stephens, R.D. (2014) Minor Planet Bull. 41, 92-95.], [Durech, J.; Tonry, J.; Erasmus, N.; Denneau, L.; et al. (2020) Astron. Astrophys. 643, A59.]","title":"rotation period","sigma":null,"units":"h"},{"notes":null,"desc":"geometric albedo","name":"albedo","value":"0.054","ref":"urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)","units":null,"sigma":"0.005","title":"geometric albedo"},{"title":"B-V","units":null,"sigma":"0.015","name":"BV","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2","value":"0.727","desc":"color index B-V magnitude difference","notes":"#obs=8; phase (min.=.89, mean=6.11, max.=15.07) deg."},{"sigma":"0.022","units":null,"title":"U-B","notes":"#obs=8; phase (min.=.89, mean=6.11, max.=15.07) deg.","desc":"color index U-B magnitude difference","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2","value":"0.390","name":"UB"},{"units":null,"sigma":null,"title":"Tholen spectral type","notes":"used 7 color indices; used ground-based radiometric albedo","name":"spec_T","value":"PC","ref":"EAR-A-5-DDR-TAXONOMY-V4.0","desc":"Tholen spectral taxonomic classification"},{"desc":"SMASSII spectral taxonomic classification","ref":"EAR-A-5-DDR-TAXONOMY-V4.0","value":"C","name":"spec_B","notes":"based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)","title":"SMASSII spectral type","sigma":null,"units":null}]}