{"signature":{"version":"1.3","source":"NASA/JPL Small-Body Database (SBDB) API"},"object":{"prefix":null,"fullname":"433 Eros (A898 PA)","neo":true,"orbit_class":{"code":"AMO","name":"Amor"},"shortname":"433 Eros","des":"433","kind":"an","spkid":"20000433","orbit_id":"659","pha":false},"orbit":{"t_jup":"4.582","producer":"Giorgini","comment":null,"source":"JPL","first_obs":"1893-10-29","orbit_id":"659","epoch":"2461200.5","moid_jup":"3.3","not_valid_after":null,"last_obs":"2021-05-13","elements":[{"name":"e","title":"eccentricity","units":null,"sigma":"9.4e-09","value":"0.223","label":"e"},{"title":"semi-major axis","name":"a","sigma":"1.5e-10","value":"1.46","label":"a","units":"au"},{"title":"perihelion distance","name":"q","units":"au","value":"1.13","sigma":"1.4e-08","label":"q"},{"title":"inclination; angle with respect to x-y ecliptic plane","name":"i","value":"10.8","sigma":"1.2e-06","label":"i","units":"deg"},{"units":"deg","label":"node","sigma":"3.6e-06","value":"304","title":"longitude of the ascending node","name":"om"},{"title":"argument of perihelion","name":"w","label":"peri","sigma":"4e-06","value":"179","units":"deg"},{"units":"deg","label":"M","value":"62.5","sigma":"1.5e-06","name":"ma","title":"mean anomaly"},{"name":"tp","title":"time of perihelion passage","label":"tp","value":"2461088.813","sigma":"2.6e-06","units":"TDB"},{"label":"period","sigma":"1e-07","value":"643","units":"d","name":"per","title":"sidereal orbital period"},{"name":"n","title":"mean motion","units":"deg/d","label":"n","sigma":"8.7e-11","value":"0.56"},{"sigma":"1.9e-10","value":"1.78","label":"Q","units":"au","name":"ad","title":"aphelion distance"}],"soln_date":"2021-05-24 17:55:05","moid":"0.149","n_del_obs_used":4,"cov_epoch":"2453311.5","sb_used":"SB441-N16","condition_code":"0","equinox":"J2000","data_arc":"46582","not_valid_before":null,"pe_used":"DE441","two_body":null,"n_dop_obs_used":2,"model_pars":[],"rms":"0.3","n_obs_used":9130},"phys_par":[{"units":null,"notes":null,"sigma":null,"value":"10.40","desc":"absolute magnitude (magnitude at 1 au from Sun and observer)","name":"H","title":"absolute magnitude","ref":"E2026L10"},{"name":"G","title":"magnitude slope","ref":"PDS3 (MPC 17258)","notes":"Fit","units":null,"desc":"magnitude slope parameter used in the standard asteroid H/G magnitude law","value":"0.46","sigma":null},{"sigma":"0.06","value":"16.84","desc":"effective body diameter","units":"km","notes":"sphere having the measured volume of 2503 +/- 25 km^3","ref":"Yeomans et al. (2000) Science v.289,pp.2085-2088","name":"diameter","title":"diameter"},{"units":"km","notes":null,"value":"34.4x11.2x11.2","sigma":null,"desc":"tri(or bi)-axial body dimensions","title":"extent","name":"extent","ref":"Veverka et al. (2000) Science v.289,pp.2088-2097"},{"notes":null,"units":"km^3/s^2","desc":"standard gravitational parameter: product of the mass (M) and gravitational constant (G)","sigma":"0.001e-04","value":"4.463e-04","name":"GM","title":"GM","ref":"Yeomans et al. (2000) Science v.289,pp.2085-2088"},{"desc":"bulk density","value":"2.67","sigma":"0.03","notes":"based on a volume of 2503 +/- 25 km^3. Porosity 10-30%.","units":"g/cm^3","ref":"Yeomans et al. (2000) Science v.289,pp.2085-2088","title":"bulk density","name":"density"},{"desc":"body rotation period (synodic)","value":"5.27","sigma":null,"notes":"REFERENCE LIST:[Campa, M. (1938) Mem. Soc. Astron. Ital. 11, 285-301.], [Beyer, M. (1953) Astron. Nachr. 281, 121-130.], [Cailliate, C. (1956) Publ. Observ. Lyon 3, fasc. 28.], [Cristescu, C. (1976) Icarus 28, 39-42.], [Dunlap, J.L. (1976) Icarus 28, 69-78.], [Millis, R.L.; Bowell, E.; Thompson, D.T. (1976) Icarus 28, 53-67.], [Scaltriti, F.; Zappala, V. (1976) Icarus 28, 29-35.], [Taylor, R.C. (1985) Icarus 61, 3, 490-496.], [Hicks, M.; Buratti, B.J.; Rabinowitz, D.L.; Genevier, G. (1999) Icarus 141, 411-414.], [Yeomans, D.K.; Antreasian, P.G.; Bariiot, J.-P.; Chesley, S.R.; et al. (2000) Science 289, 2085-2087.], [Kaasalainen, M.; Torppa, J.; Muinonen, K. (2001) Icarus 153, 37-51.], [Miller, J.K.; Konopliv, A.S.; Antreasian, P.G.; Bordi, J.J.; et al. (2002) Icarus 155, 3-17.], [Wolters, S.D.; Green, S.F.; McBride, N.; Davies, J.K. (2008) Icarus 193, 535-552.], [Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html], [Koehn, B.W.; Bowell, E.L.G.; Skiff, B.A.; Sanborn, J.J.; et al. (2014) Minor Planet Bull. 41, 286-300.], [Warner, B.D. (2017) Minor Planet Bull. 44, 22-36.], [Aznar, A.M.; Predatu, M.; Vaduvescu, O.; Oey, J. (2018) arXiv:1801.09420. Romanian J. Phys. 62, 904 (2017).], [Hasegawa, S.; Kuroda, D.; Kitazato, K.; Kasuga, T.; et al. (2018) Pub. Astron. Soc. Japan 70, A114.], [Skiff, B.A.; McLelland, K.P.; Sanborn, J.J.; Pravec, P.; Koehn, B.W. (2019) Minor Planet Bull. 46, 238-265.], [Warner, B.D.; Stephens, R.D. (2019) Minor Planet Bull. 46, 27-40.]","units":"h","ref":"LCDB (Rev. 2023-October); Warner et al., 2009","title":"rotation period","name":"rot_per"},{"units":null,"notes":null,"sigma":"0.05","value":"11.37/17.22","desc":"spin-pole direction in R.A./Dec.","title":"pole direction","name":"pole","ref":"Yeomans et al. (2000) Science v.289,pp.2085-2088"},{"name":"albedo","title":"geometric albedo","ref":"Veverka et al. (2000) Science v.289,pp.2088-2097","notes":"average","units":null,"desc":"geometric albedo","sigma":"0.06","value":"0.25"},{"name":"BV","title":"B-V","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2","units":null,"notes":"#obs=48; phase (min.=8.73, mean=34.88, max.=57.19) deg.","value":"0.921","sigma":"0.021","desc":"color index B-V magnitude difference"},{"title":"U-B","name":"UB","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2","units":null,"notes":"#obs=45; phase (min.=7.37, mean=34.55, max.=57.19) deg.","sigma":"0.027","value":"0.531","desc":"color index U-B magnitude difference"},{"name":"spec_T","title":"Tholen spectral type","ref":"EAR-A-5-DDR-TAXONOMY-V4.0","notes":"used 7 color indices; used ground-based radiometric albedo","units":null,"desc":"Tholen spectral taxonomic classification","value":"S","sigma":null},{"title":"SMASSII spectral type","name":"spec_B","ref":"EAR-A-5-DDR-TAXONOMY-V4.0","notes":"based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)","units":null,"desc":"SMASSII spectral taxonomic classification","sigma":null,"value":"S"}]}