{"object":{"neo":false,"shortname":"349 Dembowska","des":"349","orbit_class":{"code":"MBA","name":"Main-belt Asteroid"},"prefix":null,"spkid":"20000349","pha":false,"fullname":"349 Dembowska (A892 XB)","orbit_id":"146","kind":"an"},"signature":{"source":"NASA/JPL Small-Body Database (SBDB) API","version":"1.3"},"orbit":{"two_body":null,"sb_used":"SB441-N16","first_obs":"1892-12-11","equinox":"J2000","orbit_id":"146","condition_code":"0","epoch":"2461200.5","n_dop_obs_used":null,"rms":"0.51","source":"JPL","n_del_obs_used":null,"n_obs_used":4480,"soln_date":"2026-03-11 21:40:40","model_pars":[],"t_jup":"3.257","pe_used":"DE441","moid":"1.67","data_arc":"48497","moid_jup":"2.27","comment":null,"cov_epoch":"2457812.5","not_valid_after":null,"elements":[{"units":null,"name":"e","title":"eccentricity","label":"e","sigma":"4e-09","value":"0.0885"},{"title":"semi-major axis","name":"a","label":"a","units":"au","sigma":"2.9e-09","value":"2.93"},{"name":"q","title":"perihelion distance","label":"q","units":"au","sigma":"1.1e-08","value":"2.67"},{"sigma":"2.8e-07","value":"8.25","title":"inclination; angle with respect to x-y ecliptic plane","name":"i","label":"i","units":"deg"},{"units":"deg","title":"longitude of the ascending node","name":"om","label":"node","sigma":"2.2e-06","value":"32.2"},{"label":"peri","name":"w","title":"argument of perihelion","units":"deg","value":"344","sigma":"3.1e-06"},{"label":"M","name":"ma","title":"mean anomaly","units":"deg","value":"298","sigma":"2.4e-06"},{"name":"tp","title":"time of perihelion passage","label":"tp","units":"TDB","sigma":"1.2e-05","value":"2461513.789"},{"label":"period","title":"sidereal orbital period","name":"per","units":"d","value":"1830","sigma":"2.7e-06"},{"value":"0.197","sigma":"2.9e-10","label":"n","title":"mean motion","name":"n","units":"deg/d"},{"units":"au","name":"ad","title":"aphelion distance","label":"Q","sigma":"3.2e-09","value":"3.18"}],"not_valid_before":null,"last_obs":"2025-09-22","producer":"Otto Matic"},"phys_par":[{"ref":"MPO964270","sigma":null,"value":"5.97","name":"H","title":"absolute magnitude","desc":"absolute magnitude (magnitude at 1 au from Sun and observer)","notes":"IRAS observations used: 17","units":null},{"ref":"PDS3 (MPC 17258)","value":"0.37","sigma":null,"desc":"magnitude slope parameter used in the standard asteroid H/G magnitude law","name":"G","title":"magnitude slope","units":null,"notes":"Fit"},{"name":"diameter","title":"diameter","desc":"effective body diameter","notes":"IRAS observations used: 17","units":"km","ref":"IRAS-A-FPA-3-RDR-IMPS-V6.0","sigma":"4.3","value":"139.77"},{"value":"4.701","sigma":null,"ref":"LCDB (Rev. 2023-October); Warner et al., 2009","units":"h","notes":"REFERENCE LIST:[Chang, Y.C.; Chang, C.-S. (1963) Acta Astron. Sin. 11, 139-149.], [Tedesco, E.F. (1979) PhD Dissertation, New. Mex. State Univ. 280pp.], [Zappala, V.; van Houten-Groeneveld, I.; van Houten, C.J. (1979) Astron. Astrophys. Suppl. Ser. 35, 213-221.], [Haupt, H. (1980) Mitt. Univ. Graz No. 69.], [Magnusson, P. (1986) Icarus 68, 1-39.], [Di Martino, M.; Zappala, V.; De Sanctis, G.; Cacciatori, S. (1987) Icarus 69, 338-353.], [Lupishko, D.F.; Velichko, F.P. (1987) Kin. Fiz. Neb. Tel 3(1), 57-65; Kinematics and Physics of Celestial Bodies 3(1), 63-71.], [Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R.; Greenberg, R.; et al. (1987) Icarus 70, 191-245.], [Drummond, J.D.; Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R. (1988) Icarus 76, 19-77.], [Lagerkvist, C.I.; Magnusson, P.; Williams, I.P.; Buontempo, M.E.; et al. (1988) Astron. Astrophys. Suppl. Ser. 73, 395-405.], [Magnusson, P. (1990) Icarus 85, 229-240.], [Drummond, J.D.; Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R. (1991) Icarus 89, 44-64.], [De Angelis, G. (1995) Planet. Space Sci. 43, 649-682.], [Behrend, R. (2002) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html], [Torppa, J.; Kaasalainen, M.; Michalowski, T.; Kwiatkowski, T.; et al. (2003) Icarus 164, 346-383.], [Majaess, D.J.; Tanner, J.; Savoy, J.; Sampson, B. (2008) Minor Planet Bull. 35, 88-91.], [Durech, J. (2011) Database of Asteroid Models from Inversion Techniques (DAMIT). http://astro.troja.mff.cuni.cz/projects/asteroids3D/web.php], [Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.], [Alton, K.B. (2015) Minor Planet Bull. 42, 146-148.], [Cellino, A.; Hestroffer, D.; Lu, X.-P.; Muinonen, K.; Tanga, P. (2019) Astron. Astrophys. 631, A67.], [Colognese, A. (2019) Minor Planet Bull. 46, 422.]","desc":"body rotation period (synodic)","title":"rotation period","name":"rot_per"},{"ref":"IRAS-A-FPA-3-RDR-IMPS-V6.0","sigma":"0.025","value":"0.3840","title":"geometric albedo","name":"albedo","desc":"geometric albedo","notes":"IRAS observations used: 17","units":null},{"sigma":"0.028","value":"0.945","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2","notes":"#obs=25; phase (min.=2.27, mean=13.08, max.=21.36) deg.","units":null,"title":"B-V","name":"BV","desc":"color index B-V magnitude difference"},{"value":"0.540","sigma":"0.042","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2","units":null,"notes":"#obs=6; phase (min.=3.18, mean=12.04, max.=20.64) deg.","desc":"color index U-B magnitude difference","title":"U-B","name":"UB"},{"value":"R","sigma":null,"ref":"EAR-A-5-DDR-TAXONOMY-V4.0","units":null,"notes":"used 7 color indices; used ground-based radiometric albedo","desc":"Tholen spectral taxonomic classification","title":"Tholen spectral type","name":"spec_T"},{"sigma":null,"value":"R","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,"title":"SMASSII spectral type","name":"spec_B","desc":"SMASSII spectral taxonomic classification"}]}