astro.wikisort.org - Asteroid
Galatea (minor planet designation: 74 Galatea) is a large C-type main-belt asteroid. Its carbonaceous surface is very dark in color with an albedo of just 0.034.[7] Galatea was found by the prolific comet discoverer Ernst Tempel on August 29, 1862, in Marseilles, France. It was his third asteroid discovery. It is named after one of the two Galateas in Greek mythology. A stellar occultation by Galatea was observed on September 8, 1987. The name Galatea has also been given to one of Neptune's satellites.
| Discovery | |
|---|---|
| Discovered by | Ernst Wilhelm Tempel |
| Discovery date | August 29, 1862 |
| Designations | |
MPC designation | (74) Galatea |
| Pronunciation | /ɡæləˈtiːə/[1] |
Minor planet category | Main belt |
| Adjectives | Galatean |
| Orbital characteristics[2] | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 515.376 Gm (3.445 AU) |
| Perihelion | 315.937 Gm (2.112 AU) |
Semi-major axis | 415.657 Gm (2.778 AU) |
| Eccentricity | 0.240 |
Orbital period (sidereal) | 1691.658 d (4.63 a) |
Mean anomaly | 36.838° |
| Inclination | 4.075° |
Longitude of ascending node | 197.313° |
Argument of perihelion | 174.519° |
| Physical characteristics | |
| Dimensions | 120.67 ± 7.15 km[3] |
| Mass | (6.13 ± 5.36) × 1018 kg[3] |
Mean density | 6.66 ± 5.94[3] g/cm3 |
Synodic rotation period | 17.270[4] h |
Geometric albedo | 0.043 [5] |
Spectral type | C[6] |
Absolute magnitude (H) | 8.66 |
Photometric observations of this asteroid made during 2008 at the Organ Mesa Observatory in Las Cruces, New Mexico gave a light curve with a period of 17.270 ± 0.002 hours and a brightness variation of 0.08 ± 0.01 in magnitude. The curve displays four minima and four maxima.[4] The spectra of the asteroid does not display evidence of aqueous alteration.[7]
References
- Noah Webster (1884) A Practical Dictionary of the English Language
- Yeomans, Donald K., "74 Galatea", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 30 March 2013.
- Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73 (1): 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
- Pilcher, Frederick (September 2008), "Period Determinations for 26 Proserpina, 34 Circe 74 Galatea, 143 Adria, 272 Antonia, 419 Aurelia, and 557 Violetta", The Minor Planet Bulletin, 35 (3): 135–138, Bibcode:2008MPBu...35..135P.
- Asteroid Data Sets Archived 2009-12-17 at the Wayback Machine
- Fornasier, S.; et al. (February 1999), "Spectroscopic comparison of aqueous altered asteroids with CM2 carbonaceous chondrite meteorites", Astronomy and Astrophysics Supplement, 135: 65−73, Bibcode:1999A&AS..135...65F, doi:10.1051/aas:1999161.
External links
- 74 Galatea at AstDyS-2, Asteroids—Dynamic Site
- 74 Galatea at the JPL Small-Body Database
 | This article about a C-type asteroid native to the asteroid belt is a stub. You can help Wikipedia by expanding it. |
На других языках
[de] (74) Galatea
(74) Galatea ist ein Asteroid des Hauptgürtels, der am 29. August 1862 durch den deutschen Astronomen Ernst Wilhelm Leberecht Tempel entdeckt wurde.- [en] 74 Galatea
[es] (74) Galatea
(74) Galatea es un asteroide que forma parte del cinturón de asteroides y fue descubierto el 29 de agosto de 1862 por Ernst Wilhelm Leberecht Tempel desde el observatorio de Marsella, Francia. Está nombrado por Galatea, un personaje de la mitología griega.[2][ru] (74) Галатея
(74) Галатея (лат. Galatea) — астероид главного пояса астероидов, который принадлежит к тёмному спектральному классу C. Он был открыт 29 августа 1862 года немецким астрономом Эрнстом Темпелем в Марсельской обсерватории и назван в честь Галатеи, одной из нереид в древнегреческой мифологии[2].Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.
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