astro.wikisort.org - Asteroid
Adrastea (minor planet designation: 239 Adrastea) is a main belt asteroid. It was discovered by Johann Palisa on 18 August 1884 in Vienna, and was named after the Greek nymph Adrasteia. This asteroid is orbiting the Sun at a distance of 2.97 AU with a period of 5.11 years and an eccentricity (ovalness) of 0.23. The orbital plane is tilted at an angle of 6.17° to the plane of the ecliptic.[1]
| Discovery | |
|---|---|
| Discovered by | Johann Palisa |
| Discovery date | 18 August 1884 |
| Designations | |
MPC designation | (239) Adrastea |
| Pronunciation | /ædrəˈstiːə/ |
Named after | Adrasteia |
Alternative designations | A884 QA, 1915 TD 1955 MK1, 1956 UJ |
Minor planet category | Main belt |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 131.66 yr (48,087 d) |
| Aphelion | 3.66279 AU (547.946 Gm) |
| Perihelion | 2.2695 AU (339.51 Gm) |
Semi-major axis | 2.96616 AU (443.731 Gm) |
| Eccentricity | 0.23486 |
Orbital period (sidereal) | 5.11 yr (1,865.9 d) |
Average orbital speed | 17.25 km/s |
Mean anomaly | 233.617° |
Mean motion | 0° 11m 34.584s / day |
| Inclination | 6.1746° |
Longitude of ascending node | 180.634° |
Argument of perihelion | 210.15° |
| Physical characteristics | |
| Dimensions | 41.52±1.4 km[1] |
Synodic rotation period | 18.4707 h (0.76961 d)[1] |
Geometric albedo | 0.0777±0.006[1] |
| Temperature | unknown |
Spectral type | unknown |
Absolute magnitude (H) | 10.4[1] |
Photometric data collected during 2009 were used for light curve analysis of this asteroid, yielding a rotation period of 18.48±0.03 h with a brightness variation of 0.45±0.05 in magnitude. The result is close to the 18.347±0.003 h period from a study performed in 2003.[2] The asteroid is roughly 42 km in diameter.[1]
References
- "JPL Small-Body Database Browser: 239 Adrastea". Jet Propulsion Laboratory. Retrieved 12 May 2016.
- Carbo, Landry; et al. (October 2009), "Asteroid Lightcurve Analysis at the Oakley Southern Sky Observatory: 2008 October thru 2009 March", Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, 36 (4): 152–157, Bibcode:2009MPBu...36..152C.
External links
- The Asteroid Orbital Elements Database
- Minor Planet Discovery Circumstances
- 239 Adrastea at AstDyS-2, Asteroids—Dynamic Site
- 239 Adrastea at the JPL Small-Body Database
 | This article about an asteroid native to the asteroid belt is a stub. You can help Wikipedia by expanding it. |
На других языках
[de] (239) Adrastea
(239) Adrastea ist ein Asteroid des Asteroiden-Hauptgürtels, der am 18. August 1884 von Johann Palisa entdeckt wurde.- [en] 239 Adrastea
[es] (239) Adrastea
(239) Adrastea es un asteroide perteneciente al cinturón de asteroides descubierto el 18 de agosto de 1884 por Johann Palisa desde el observatorio de Viena, Austria. Está nombrado por Adrastea, una diosecilla de la mitología griega.[2][ru] (239) Адрастея
(239) Адрастея (др.-греч. Ἀδράστεια) — типичный астероид главного пояса, который был обнаружен 18 августа 1884 года австрийским астрономом Иоганном Пализой в Венской обсерватории. Назван в честь Адрастеи, нимфы в древнегреческой мифологии, воспитавшей Зевса на Крите и являвшейся его кормилицей, или дочери Зевса, богини вечной справедливости. Название было предложено госпожой Бертой Шнайдер[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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