astro.wikisort.org - Asteroid
Hekate (minor planet designation: 100 Hekate) is a large main-belt asteroid.
 orbit | |
| Discovery | |
|---|---|
| Discovered by | J. C. Watson |
| Discovery date | 11 July 1868 |
| Designations | |
MPC designation | (100) Hekate |
| Pronunciation | /ˈhɛkətiː/[1] |
Named after | Hecate |
Alternative designations | 1955 QA |
Minor planet category | Main belt |
| Adjectives | Hekatean (Hecatæan) /hɛkəˈtiːən/[1] |
| Orbital characteristics[2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 144.93 yr (52936 d) |
| Aphelion | 3.61005 AU (540.056 Gm) |
| Perihelion | 2.56919 AU (384.345 Gm) |
Semi-major axis | 3.08962 AU (462.201 Gm) |
| Eccentricity | 0.16844 |
Orbital period (sidereal) | 5.43 yr (1983.6 d) |
Mean anomaly | 64.6430° |
Mean motion | 0° 10m 53.357s / day |
| Inclination | 6.42957° |
Longitude of ascending node | 127.199° |
Argument of perihelion | 184.736° |
| Earth MOID | 1.55453 AU (232.554 Gm) |
| Jupiter MOID | 1.66378 AU (248.898 Gm) |
| TJupiter | 3.194 |
| Physical characteristics | |
| Dimensions | 88.66±2.0 km[2] 89 km[3] |
| Mass | ~1.0×1018 kg |
Mean density | ~2.7 g/cm3 (estimate)[4] |
Equatorial surface gravity | ~0.033 m/s2 |
Equatorial escape velocity | ~0.054 km/s |
Synodic rotation period | 27.066 h (1.1278 d)[2] 0.5555 d[5] |
Geometric albedo | 0.1922±0.009[2] 0.192[3] |
| Temperature | ~154 K max: 238K (-35°C) |
Spectral type | S-type asteroid |
Absolute magnitude (H) | 7.67 |
About
This is a stony S-type asteroid with a diameter of 87+5
−4 km and a sidereal rotation period of 27.07 h.[6] It orbits in the same region of space as the Hygiea asteroid family, though it is actually an unrelated interloper. However, its geometric albedo of 0.22±0.03[6] 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.[7]
Hekate was the 100th asteroid to be discovered, by Canadian-American astronomer J. C. Watson (his fourth discovery) on July 11, 1868.[8] It is named after Hecate, the goddess of witchcraft in Greek mythology, but its name also commemorates it as the hundredth asteroid, as hekaton is Greek for 'hundred'.
A Hekatean occultation of a star was observed on July 14, 2003, from New Zealand.
See also
- List of minor planets: 1–1000
- 100000 Astronautica
References
- "Hecate". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
- "100 Hekate". JPL Small-Body Database. Jet Propulsion Laboratory. SPK-ID: 2000100. Retrieved 12 May 2016.
- "IRAS Minor Planet Survey". Archived from the original on 11 December 2005.
- Krasinsky, G. A. (2002). "Hidden Mass in the Asteroid Belt". Icarus. 158: 98. Bibcode:2002Icar..158...98K. doi:10.1006/icar.2002.6837.
- "Asteroid Lightcurve Parameters".
- Marciniak, A.; et al. (May 2019). "Thermal properties of slowly rotating asteroids: results from a targeted survey". Astronomy & Astrophysics. 625: 40. arXiv:1905.06056. Bibcode:2019A&A...625A.139M. doi:10.1051/0004-6361/201935129. A139.
- McDonald, S. L. (1948). "General perturbations and mean elements, with representations of 35 minor planets of the Hecuba group". The Astronomical Journal. 53: 199. Bibcode:1948AJ.....53..199M. doi:10.1086/106097.
- "Discovery Circumstances: Numbered Minor Planets 1–5000". IAU Minor Planet Center. Retrieved 7 April 2013.
External links
- 100 Hekate at AstDyS-2, Asteroids—Dynamic Site
- 100 Hekate at the JPL Small-Body Database
На других языках
[de] (100) Hekate
(100) Hekate ist ein Asteroid, der nach Hekate benannt wurde, der Göttin der Zauberkunst, der Nekromantie und der Wegkreuzungen aus der griechischen Mythologie. Hekate war der 100. Asteroid, der am 11. Juli 1868 von J. C. Watson entdeckt wurde. Er wählte diesen Namen seines vierten entdeckten Asteroiden auch, weil Ekató auf griechisch für 'hundert' steht.[1]- [en] 100 Hekate
[es] (100) Hekate
(100) Hekate es un asteroide del cinturón de asteroides descubierto por James Craig Watson en 1868.[ru] (100) Геката
(100) Геката (лат. Hekate) — сотый по счёту астероид главного пояса, который был обнаружен 11 июля 1868 года канадско-американским астрономом Джеймсом Уотсоном в Детройтской обсерватории, США и назван в честь Гекаты, богини ночных видений из древнегреческой мифологии. Так же слово «hekaton» означает по гречески сотню, что отражает порядковый номер астероида[3].Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.
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