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Universite de Liege, Institut d'Astrophysique, Liege, pp. 195-201.], [De Angelis, G. (1995) Planet. Space Sci. 43, 649-682.], [Szabo, Gy.; Sarneczky, K.; Kiss, L.L. (1999) in Proc. IAU Coll. 173, Evolution and Source Regions of Asteroids and Comets, 185-188.], [Kaasalainen, M.; Torppa, J.; Piironen, J. (2002) Astron. Astrophys. 383, L19-L22.], [Lacerda, P.; Jewitt, D.C. (2007) Astron. J. 133, 1393-1408.], [Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html], [Hamanowa, H.; Hamanowa, H. (2009) Minor Planet Bull. 36, 87-88.], [Stephens, R.D. (2009) Minor Planet Bull. 36, 59-62.], [Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html], [Behrend, R. (2013) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html], [Gorshanov, D.L.; Arkharov, A.A.; Larionov, V.M. (2014) Solar System Research 48, 202-211.], [Marchis, F.; Durech, J.; Castillo-Rogez, J.; Vachier, F.; et al. (2014). Astrophys. J. Let. 783, L37.], [Stephens, R.D.; Coley, D.R.; French, L.M. (2014) Minor Planet Bull. 41, 210-212.], [Hanus, J.; Delbo, M.; Durech, J.; Ali-Lagoa, V. (2015) Icarus 256, 101-116.], [Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html], [Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2020) Ap. J. Supl. Ser. 247, id.26.], [Stephens, R.D.; Warner, B.D. (2020) Minor Planet Bull. 47, 43-46.], [Stephens, R.D.; Warner, B.D. (2022) Minor Planet Bull. 49, 51-55.]","title":"rotation period","value":"6.924","sigma":null,"name":"rot_per","units":"h"},{"units":null,"sigma":null,"name":"albedo","ref":"EAR-A-5-DDR-ALBEDOS-V1.0:TRIAD","notes":"TRIAD quality code 3","title":"geometric albedo","value":"0.025","desc":"geometric albedo"},{"title":"B-V","notes":"#obs=9; phase (min.=3.84, mean=5.77, max.=7.78) deg.","desc":"color index B-V magnitude difference","value":"0.776","ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2","name":"BV","sigma":"0.027","units":null},{"ref":"EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2","desc":"color index U-B magnitude difference","notes":"#obs=7; phase (min.=3.84, mean=6.11, max.=7.78) deg.","value":"0.249","title":"U-B","sigma":"0.034","name":"UB","units":null},{"ref":"EAR-A-5-DDR-TAXONOMY-V4.0","notes":"used 7 color indices; used ground-based radiometric albedo","value":"D","title":"Tholen spectral type","desc":"Tholen spectral taxonomic classification","units":null,"name":"spec_T","sigma":null}],"orbit":{"n_obs_used":8427,"n_dop_obs_used":null,"t_jup":"2.899","pe_used":"DE441","last_obs":"2026-04-13","elements":[{"name":"e","sigma":"3.9e-09","label":"e","units":null,"title":"eccentricity","value":"0.0243"},{"title":"semi-major axis","value":"5.28","label":"a","units":"au","sigma":"2.7e-08","name":"a"},{"name":"q","sigma":"4.3e-08","label":"q","units":"au","title":"perihelion distance","value":"5.15"},{"units":"deg","label":"i","name":"i","sigma":"8.8e-08","value":"18.1","title":"inclination; angle with respect to x-y ecliptic plane"},{"sigma":"3.5e-07","name":"om","units":"deg","label":"node","title":"longitude of the ascending node","value":"343"},{"units":"deg","label":"peri","sigma":"1.1e-05","name":"w","title":"argument of perihelion","value":"181"},{"title":"mean anomaly","value":"24.9","label":"M","units":"deg","name":"ma","sigma":"1.3e-05"},{"title":"time of perihelion passage","value":"2460894.081","name":"tp","sigma":"0.00016","units":"TDB","label":"tp"},{"sigma":"3.4e-05","name":"per","units":"d","label":"period","value":"4430","title":"sidereal orbital period"},{"title":"mean motion","value":"0.0813","name":"n","sigma":"6.3e-10","label":"n","units":"deg/d"},{"value":"5.41","title":"aphelion distance","name":"ad","sigma":"2.8e-08","units":"au","label":"Q"}],"orbit_id":"139","data_arc":"43526","sb_used":"SB441-N16","moid":"4.16","source":"JPL","model_pars":[],"first_obs":"1907-02-11","epoch":"2461200.5","equinox":"J2000","not_valid_before":null,"moid_jup":"0.256","condition_code":"0","not_valid_after":null,"soln_date":"2026-06-05 03:50:35","two_body":null,"n_del_obs_used":null,"producer":"Otto Matic","comment":null,"rms":"0.26","cov_epoch":"2458404.5"},"signature":{"version":"1.3","source":"NASA/JPL Small-Body Database (SBDB) API"},"object":{"fullname":"624 Hektor (A907 CF)","des":"624","shortname":"624 Hektor","spkid":"20000624","orbit_id":"139","pha":false,"neo":false,"orbit_class":{"code":"TJN","name":"Jupiter Trojan"},"prefix":null,"kind":"an"}}
