100 Hekate

Main-belt asteroid October 2019 yes #D6D6D6 100 Hekate 000100-asteroid shape model (100) Hekate.png 3D convex shape model of Hekate J. C. Watson 11 July 1868 (100) Hekate 1955 QA Hecate ˈ h ɛ k ə t iːHecate Hekatean (Hecatæan) h ɛ k ə ˈ t iː ə n Main belt 2025 Nov 21 (JD 2461000.5) 3.60957 AU Gm on on 2.57132 AU Gm on 3.09045 AU Gm on 0.16798 5.433 yr (1984.4 d) 6.43092° 127.156° 183.552° 323.244° 88.734 1.961 km89 km ~1.0×1018 kg ~2.7 g/cm3 (estimate) ~0.033 m/s2 ~0.054 km/s 27.066 h d on on0.5555 dAsteroid Lightcurve Parameters http://www.psi.edu/pds/resource/lc.html S-type asteroid 7.67 0.205 0.010.192 ~154 Kmax: 238K (−35 °C) 0.181414666 ms / day 154.56 yr (56452 d) 0 1.55453 AU Gm on 1.66378 AU Gm on 3.194 100 Hekate is a large main-belt asteroid. About thumb|left|Orbit of Hekate Hekate is a stony S-type asteroid with a diameter of 87 5 4 km and a sidereal rotation period of 27.07 hours commas. It orbits in the same region of space as the Hygiea asteroid family, though it is actually an unrelated interloper. Its geometric albedo of 0.22 0.03 is too high, and it is of the wrong spectral class to be part of the dark carbonaceous Hygiea family. It is listed as a member of the Hecuba group of asteroids that orbit near the 2:1 mean-motion resonance with Jupiter. Hekate was the 100th asteroid to be discovered, by Canadian-American astronomer J. C. Watson (his fourth discovery) on July 11, 1868. It is named after Hecate, the goddess of witchcraft in Greek mythology, but its name also commemorates it as the hundredth asteroid, as ἑκατόν (hekaton) is Greek for 'hundred'. An occultation of a star by Hekate was observed on July 14, 2003, from New Zealand. See also List of minor planets: 1–1000 100000 Astronautica References Thermal properties of slowly rotating asteroids: results from a targeted survey Marciniak A. Alí-Lagoa V. Müller T. G. Szakáts R. Molnár L. Pál A. Podlewska-Gaca E. Parley N. Antonini P. Barbotin E. Behrend R. Bernasconi L. Butkiewicz-Bąk M. Crippa R. Duffard R. Ditteon R. Feuerbach M. Fauvaud S. Garlitz J. Geier S. Goncalves R. Grice J. Grześkowiak I. Hirsch R. Horbowicz J. Kamiński K. Kamińska M. K. Kim D. -H. Kim M. -J. Konstanciak I. Kudak V. Kulczak P. Maestre J. L. Manzini F. Marks S. Monteiro F. Ogłoza W. Oszkiewicz D. Pilcher F. Perig V. Polakis T. Polińska M. Roy R. Sanabria J. J. Santana-Ros T. Skiff B. Skrzypek J. Sobkowiak K. Sonbas E. Thizy O. Trela P. Urakawa S. Żejmo M. Żukowski K. 1 Astronomy & Astrophysics 625 A139 40 May 2019 1905.06056 2019A&A...625A.139M 10.1051/0004-6361/201935129 146059739 100 Hekate 23 October 2025 2000100 100 Hekate Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=100 23 October 2025 IRAS Minor Planet Survey http://www.psi.edu/pds/archive/simps.html https://archive.today/20051211134758/http://www.psi.edu/pds/archive/simps.html dead 2005-12-11 Krasinsky G. A. 2002 Hidden Mass in the Asteroid Belt Icarus 158 1 98 2002Icar..158...98K 10.1006/icar.2002.6837 McDonald S. L. 1948 General perturbations and mean elements, with representations of 35 minor planets of the Hecuba group The Astronomical Journal 53 199 1948AJ.....53..199M 10.1086/106097 http://adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1948AJ.....53..199M&link_type=ARTICLE&db_key=AST&high= Discovery Circumstances: Numbered Minor Planets 1–5000 IAU Minor Planet Center https://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html 2013-04-07 External links 100 99 Dike 100 101 Helena Category:S-type asteroids (SMASS) Category:S-type asteroids (Tholen) Hekate Hekate 18680711 Category:Objects observed by stellar occultation Category:Hecate