astro.wikisort.org - Asteroid
Alkeste (minor planet designation: 124 Alkeste) is a main-belt asteroid, and it is an S-type (silicaceous) in composition. C.H.F. Peters discovered the asteroid on August 23, 1872, from the observatory at Hamilton College, New York State. The name was chosen by Adelinde Weiss, wife of the astronomer Edmund Weiss, and refers to Alcestis, a woman in Greek mythology.[4]
| Discovery | |
|---|---|
| Discovered by | Christian Heinrich Friedrich Peters |
| Discovery date | 23 August 1872 |
| Designations | |
MPC designation | (124) Alkeste |
| Pronunciation | /ælˈkɛstiː/[1] |
Named after | Alcestis |
Alternative designations | A872 QA |
Minor planet category | Main belt |
| Orbital characteristics[2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 143.65 yr (52468 d) |
| Aphelion | 2.8288 AU (423.18 Gm) |
| Perihelion | 2.43166 AU (363.771 Gm) |
Semi-major axis | 2.63022 AU (393.475 Gm) |
| Eccentricity | 0.075491 |
Orbital period (sidereal) | 4.27 yr (1558.1 d) |
Average orbital speed | 18.34 km/s |
Mean anomaly | 343.779° |
Mean motion | 0° 13m 51.816s / day |
| Inclination | 2.9573° |
Longitude of ascending node | 187.991° |
Argument of perihelion | 61.413° |
| Earth MOID | 1.41927 AU (212.320 Gm) |
| Jupiter MOID | 2.17851 AU (325.900 Gm) |
| TJupiter | 3.394 |
| Physical characteristics | |
| Dimensions | 88.65±1.65 km 76.36±1.7 km |
| Mass | 4.7×1017 kg |
Equatorial surface gravity | 0.0214 m/s² |
Equatorial escape velocity | 0.0404 km/s |
Synodic rotation period | 9.921 h (0.4134 d) |
Geometric albedo | 0.1728±0.008 |
| Temperature | ~172 K |
Spectral type | S |
Absolute magnitude (H) | 8.11,[2] 8.09[3] |
A 20 chord stellar occultation by Alkeste was observed when the asteroid passed in front of the third magnitude star Beta Virginis on June 24, 2003. The event was visible from Australia and New Zealand.[5]
The asteroid has been observed in 3 more stellar occultation events.[6]
Photometric observations of this asteroid in 2016 produced lightcurves indicating a rotation period of 9.9 hours with an amplitude variation of 0.18 in magnitude. This result matched previous determinations of the spin rate. The lightcurve was found to vary over the observation period as the viewing angle changed, suggesting the shadowing of topographic features.[7]
References
- 'Alceste' in Noah Webster (1884) A Practical Dictionary of the English Language
- Yeomans, Donald K., "124 Alkeste", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016.
- Warner, Brian D. (December 2007), "Initial Results of a Dedicated H-G Project", The Minor Planet Bulletin, vol. 34, pp. 113–119, Bibcode:2007MPBu...34..113W.
- Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names. Springer Science & Business Media. p. 27. ISBN 978-3-540-00238-3.
- Occultation by (124) Alkeste - 2003 Jun 24, Occultation Section, Royal Astronomical Society of New Zealand, 23 May 2003, retrieved 19 January 2018.
- "Asteroid Data Sets". sbn.psi.edu. Retrieved 19 May 2018.
- Pilcher, Frederick (October 2016), "Three Asteroids with Changing Lightcurves: 124 Alkeste, 465 Alekto, and 569 Misa", The Minor Planet Bulletin, 43 (4): 296–299, Bibcode:2016MPBu...43..296P.
External links
- 124 Alkeste at AstDyS-2, Asteroids—Dynamic Site
- 124 Alkeste at the JPL Small-Body Database
 | This article about an S-type asteroid native to the asteroid belt is a stub. You can help Wikipedia by expanding it. |
На других языках
[de] (124) Alkeste
(124) Alkeste ist ein Asteroid des Asteroiden-Hauptgürtels, der am 23. August 1872 von Christian Heinrich Friedrich Peters entdeckt wurde.- [en] 124 Alkeste
[es] (124) Alkeste
(124) Alkeste es un asteroide que forma parte del cinturón de asteroides y fue descubierto por Christian Heinrich Friedrich Peters desde el observatorio Litchfield de Clinton, Estados Unidos, el 23 de agosto de 1872. Está nombrado por Alceste, un personaje de la mitología griega.[2][ru] (124) Алькеста
(124) Алькеста (лат. Alkeste) — астероид главного пояса, принадлежащий к светлому спектральному классу S. Он был открыт 23 августа 1872 года германо-американским астрономом К. Г. Ф. Петерсом в Клинтоне, США и назван в честь Алькесты, персонажа древнегреческой мифологии[1].Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.
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