{"object":{"fullname":"88 Thisbe (A866 LA)","orbit_class":{"name":"Main-belt Asteroid","code":"MBA"},"pha":false,"prefix":null,"orbit_id":"192","kind":"an","des":"88","shortname":"88 Thisbe","neo":false,"spkid":"20000088"},"signature":{"source":"NASA/JPL Small-Body Database (SBDB) API","version":"1.3"},"orbit":{"condition_code":"0","elements":[{"label":"e","units":null,"sigma":"2.4e-09","name":"e","title":"eccentricity","value":"0.166"},{"label":"a","sigma":"1.7e-09","units":"au","value":"2.77","title":"semi-major axis","name":"a"},{"title":"perihelion distance","name":"q","value":"2.31","units":"au","sigma":"6.7e-09","label":"q"},{"units":"deg","sigma":"2.5e-07","label":"i","title":"inclination; angle with respect to x-y ecliptic plane","name":"i","value":"5.23"},{"label":"node","sigma":"2.7e-06","units":"deg","value":"276","title":"longitude of the ascending node","name":"om"},{"units":"deg","sigma":"2.9e-06","label":"peri","name":"w","title":"argument of perihelion","value":"37"},{"value":"244","name":"ma","title":"mean anomaly","sigma":"1e-06","units":"deg","label":"M"},{"value":"2461740.298","name":"tp","title":"time of perihelion passage","sigma":"5.1e-06","units":"TDB","label":"tp"},{"label":"period","sigma":"1.6e-06","units":"d","value":"1680","name":"per","title":"sidereal orbital period"},{"value":"0.214","name":"n","title":"mean motion","sigma":"2e-10","units":"deg/d","label":"n"},{"title":"aphelion distance","name":"ad","value":"3.22","units":"au","sigma":"2e-09","label":"Q"}],"n_del_obs_used":null,"comment":null,"moid_jup":"2.04","orbit_id":"192","producer":"Otto Matic","soln_date":"2026-06-05 03:08:27","not_valid_before":null,"n_dop_obs_used":null,"data_arc":"58370","model_pars":[],"cov_epoch":"2458041.5","last_obs":"2026-04-13","t_jup":"3.313","n_obs_used":5605,"equinox":"J2000","source":"JPL","moid":"1.3","two_body":null,"epoch":"2461200.5","pe_used":"DE441","sb_used":"SB441-N16","first_obs":"1866-06-21","not_valid_after":null,"rms":"0.43"},"phys_par":[{"title":"absolute magnitude","units":null,"sigma":null,"desc":"absolute magnitude (magnitude at 1 au from Sun and observer)","name":"H","ref":"E2026E47","value":"7.24","notes":"IRAS observations used: 5"},{"value":"0.14","ref":"PDS3 (MPC 17257)","name":"G","desc":"magnitude slope parameter used in the standard asteroid H/G magnitude law","notes":"Fit","title":"magnitude slope","sigma":null,"units":null},{"units":"km","sigma":null,"title":"diameter","notes":"Yeomans E-mail 2001-Apr-04","desc":"effective body diameter","name":"diameter","ref":"Dunham occult. list: Millis et al. 1983","value":"232"},{"sigma":null,"units":"h","title":"rotation period","notes":"REFERENCE LIST:[Choloniewski, J. (1979) Acta Astron. 29, 105-107.], [Schober, H.J.; Scaltriti, F.; Zappala, V. (1979) Astron. Astrophys. Suppl. Ser. 36, 1-8.], [Di Martino, M.; Zappala, V.; De Sanctis, G.; Cacciatori, S. (1987) Icarus 69, 338-353.], [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.], [Torppa, J.; Kaasalainen, M.; Michalowski, T.; Kwiatkowski, T.; et al. (2003) Icarus 164, 346-383.], [Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html], [Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.], [Behrend, R. (2012) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html], [Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.], [Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.], [Hanus, J.; Viikinkoski, M.; Marchis, F.; Durech, J.; et al (2017) Astron. Astrophys. 601, A114.], [Martikainen, J.; Muinonen, K.; Penttila, A.; Cellino, A.; Wang, X.-B. (2021) Astron. Astrophys. 649, A98.], [Vernazza, P.; Ferrais, M.; Jorda, L.; Hanus, J.; et al. (2021) Astron. Astrophys 654, id. A56.], [Ferrais, M.; Vernazza, P.; Jorda, L.; Jehin, E.; et al. (2022) Minor Planet Bull. 49, 307-313.], [Behrend, R. (2023) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]","desc":"body rotation period (synodic)","ref":"LCDB (Rev. 2023-October); Warner et al., 2009","value":"6.042","name":"rot_per"},{"title":"geometric albedo","units":null,"sigma":"0.003","name":"albedo","value":"0.0671","ref":"IRAS-A-FPA-3-RDR-IMPS-V6.0","desc":"geometric albedo","notes":"IRAS observations used: 5"},{"desc":"color index B-V magnitude difference","name":"BV","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2","value":"0.681","notes":"#obs=9; phase (min.=2.94, mean=10.99, max.=19.67) deg.","title":"B-V","units":null,"sigma":"0.008"},{"sigma":"0.013","units":null,"title":"U-B","notes":"#obs=5; phase (min.=2.94, mean=5.76, max.=14.70) deg.","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2","value":"0.305","name":"UB","desc":"color index U-B magnitude difference"},{"title":"Tholen spectral type","units":null,"sigma":null,"name":"spec_T","value":"CF","ref":"EAR-A-5-DDR-TAXONOMY-V4.0","desc":"Tholen spectral taxonomic classification","notes":"used 7 color indices; used ground-based radiometric albedo"},{"desc":"SMASSII spectral taxonomic classification","value":"B","ref":"EAR-A-5-DDR-TAXONOMY-V4.0","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}]}