{"discovery":{"citation":null,"date":"1898-Aug-13","ref":"DISCOVERY.DB","discovery":"Discovered 1898-08-13 by Witt, G. at Berlin","site":null,"name":null,"cref":null,"location":"Berlin","who":"Witt, G."},"signature":{"version":"1.3","source":"NASA/JPL Small-Body Database (SBDB) API"},"orbit":{"moid":"0.149","equinox":"J2000","elements":[{"title":"eccentricity","label":"e","units":null,"value":"0.223","sigma":"9.4e-09","name":"e"},{"sigma":"1.5e-10","name":"a","label":"a","units":"au","title":"semi-major axis","value":"1.46"},{"title":"perihelion distance","units":"au","label":"q","value":"1.13","sigma":"1.4e-08","name":"q"},{"title":"inclination; angle with respect to x-y ecliptic plane","label":"i","units":"deg","value":"10.8","sigma":"1.2e-06","name":"i"},{"name":"om","sigma":"3.6e-06","value":"304","units":"deg","label":"node","title":"longitude of the ascending node"},{"title":"argument of perihelion","label":"peri","units":"deg","value":"179","sigma":"4e-06","name":"w"},{"name":"ma","sigma":"1.5e-06","value":"62.5","units":"deg","label":"M","title":"mean anomaly"},{"title":"time of perihelion passage","units":"TDB","label":"tp","value":"2461088.813","sigma":"2.6e-06","name":"tp"},{"value":"643","title":"sidereal orbital period","units":"d","label":"period","name":"per","sigma":"1e-07"},{"sigma":"8.7e-11","name":"n","units":"deg/d","label":"n","title":"mean motion","value":"0.56"},{"name":"ad","sigma":"1.9e-10","value":"1.78","label":"Q","units":"au","title":"aphelion distance"}],"last_obs":"2021-05-13","two_body":null,"comment":null,"source":"JPL","not_valid_after":null,"data_arc":"46582","moid_jup":"3.3","producer":"Giorgini","cov_epoch":"2453311.5","t_jup":"4.582","epoch":"2461200.5","sb_used":"SB441-N16","condition_code":"0","model_pars":[],"pe_used":"DE441","n_obs_used":9130,"n_del_obs_used":4,"n_dop_obs_used":2,"not_valid_before":null,"soln_date":"2021-05-24 17:55:05","first_obs":"1893-10-29","rms":"0.3","orbit_id":"659"},"object":{"des":"433","prefix":null,"fullname":"433 Eros (A898 PA)","pha":false,"neo":true,"spkid":"20000433","orbit_id":"659","kind":"an","orbit_class":{"code":"AMO","name":"Amor"},"shortname":"433 Eros"},"phys_par":[{"ref":"E2026L10","name":"H","sigma":null,"value":"10.40","title":"absolute magnitude","units":null,"notes":null,"desc":"absolute magnitude (magnitude at 1 au from Sun and observer)"},{"desc":"magnitude slope parameter used in the standard asteroid H/G magnitude law","value":"0.46","title":"magnitude slope","units":null,"notes":"Fit","name":"G","sigma":null,"ref":"PDS3 (MPC 17258)"},{"title":"diameter","notes":"sphere having the measured volume of 2503 +/- 25 km^3","units":"km","value":"16.84","desc":"effective body diameter","ref":"Yeomans et al. (2000) Science v.289,pp.2085-2088","sigma":"0.06","name":"diameter"},{"ref":"Veverka et al. (2000) Science v.289,pp.2088-2097","name":"extent","sigma":null,"value":"34.4x11.2x11.2","notes":null,"units":"km","title":"extent","desc":"tri(or bi)-axial body dimensions"},{"name":"GM","sigma":"0.001e-04","ref":"Yeomans et al. (2000) Science v.289,pp.2085-2088","desc":"standard gravitational parameter: product of the mass (M) and gravitational constant (G)","value":"4.463e-04","title":"GM","units":"km^3/s^2","notes":null},{"notes":"based on a volume of 2503 +/- 25 km^3. Porosity 10-30%.","units":"g/cm^3","title":"bulk density","value":"2.67","desc":"bulk density","ref":"Yeomans et al. (2000) Science v.289,pp.2085-2088","sigma":"0.03","name":"density"},{"name":"rot_per","sigma":null,"ref":"LCDB (Rev. 2023-October); Warner et al., 2009","desc":"body rotation period (synodic)","value":"5.27","title":"rotation period","units":"h","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.]"},{"sigma":"0.05","name":"pole","ref":"Yeomans et al. (2000) Science v.289,pp.2085-2088","desc":"spin-pole direction in R.A./Dec.","units":null,"notes":null,"title":"pole direction","value":"11.37/17.22"},{"ref":"Veverka et al. (2000) Science v.289,pp.2088-2097","sigma":"0.06","name":"albedo","units":null,"notes":"average","title":"geometric albedo","value":"0.25","desc":"geometric albedo"},{"desc":"color index B-V magnitude difference","title":"B-V","units":null,"notes":"#obs=48; phase (min.=8.73, mean=34.88, max.=57.19) deg.","value":"0.921","sigma":"0.021","name":"BV","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2"},{"ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2","name":"UB","sigma":"0.027","value":"0.531","units":null,"notes":"#obs=45; phase (min.=7.37, mean=34.55, max.=57.19) deg.","title":"U-B","desc":"color index U-B magnitude difference"},{"ref":"EAR-A-5-DDR-TAXONOMY-V4.0","sigma":null,"name":"spec_T","units":null,"notes":"used 7 color indices; used ground-based radiometric albedo","title":"Tholen spectral type","value":"S","desc":"Tholen spectral taxonomic classification"},{"desc":"SMASSII spectral taxonomic classification","value":"S","title":"SMASSII spectral type","notes":"based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)","units":null,"name":"spec_B","sigma":null,"ref":"EAR-A-5-DDR-TAXONOMY-V4.0"}]}