astro.wikisort.org - Galaxy
Messier 14 (also known as M14 or NGC 6402) is a globular cluster of stars in the constellation Ophiuchus. It was discovered by Charles Messier in 1764.
| Messier 14 | |
|---|---|
 Globular cluster Messier 14 in Ophiuchus | |
| Observation data (J2000 epoch) | |
| Class | VIII[1] |
| Constellation | Ophiuchus |
| Right ascension | 17h 37m 36.15s[2] |
| Declination | –03° 14′ 45.3″[2] |
| Distance | 30.3 kly (9.3 kpc)[3] |
| Apparent magnitude (V) | 7.6[4] |
| Apparent dimensions (V) | 11.0′ |
| Physical characteristics | |
| Mass | 1.04×106[3] M☉ |
| Radius | 50 ly[5] |
| Metallicity | = –1.28[3] dex |
| Other designations | NGC 6402[2] |
At a distance of about 30,000 light-years, M14 contains several hundred thousand stars. At an apparent magnitude of +7.6 it can be easily observed with binoculars. Medium-sized telescopes will show some hint of the individual stars of which the brightest is of magnitude +14.
The total luminosity of M14 is in the order of 400,000 times that of the Sun corresponding to an absolute magnitude of -9.12. The shape of the cluster is decidedly elongated. M14 is about 100 light-years across.[6]
A total of 70 variable stars are known in M14, many of the W Virginis variety common in globular clusters. In 1938, a nova appeared, although this was not discovered until photographic plates from that time were studied in 1964. It is estimated that the nova reached a maximum brightness of magnitude +9.2, over five times brighter than the brightest 'normal' star in the cluster.
Slightly over 3° southwest of M14 lies the faint globular cluster NGC 6366.
Gallery
Messier 14 with amateur telescope
Map showing location of Messier 14
See also
- List of Messier objects
References
- Shapley, Harlow; Sawyer, Helen B. (August 1927), "A Classification of Globular Clusters", Harvard College Observatory Bulletin, 849 (849): 11–14, Bibcode:1927BHarO.849...11S.
- "NGC 6402". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2006-11-15.
- Boyles, J.; et al. (November 2011), "Young Radio Pulsars in Galactic Globular Clusters", The Astrophysical Journal, 742 (1): 51, arXiv:1108.4402, Bibcode:2011ApJ...742...51B, doi:10.1088/0004-637X/742/1/51.
- "Messier 14". SEDS Messier Catalog. Retrieved 28 April 2022.
- distance × sin( diameter_angle / 2 ) = 50 ly radius
- "Messier 14 | Messier Objects". Retrieved 2020-04-14.
External links
- SEDS Messier pages on M14
- M14, Galactic Globular Clusters Database page
- NASA Astronomy Picture of the Day: The Comet and the Star Cluster (11 April 2016) - one of the two being M14
- Messier 14 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
| List |
|  |
|---|---|---|
| See also |
| |
| ||
На других языках
[de] Messier 14
Messier 14 oder M14 (auch als NGC 6402 bezeichnet) ist ein 7,9 mag heller Kugelsternhaufen mit einer Flächenausdehnung von 11,0' im Sternbild Schlangenträger (Ophiuchus) auf dem Himmelsäquator. Die Helligkeitsangaben verschiedener Quellen liegen bei 7,6 bis 8,3 mag.- [en] Messier 14
[es] Cúmulo globular M14
El Cúmulo Globular M14 (también conocido como Objeto de Messier n.º 14 o NGC 6402) es un cúmulo globular situado en la constelación de Ofiuco. Fue descubierto por Charles Messier en 1764.[ru] M 14 (звёздное скопление)
M 14 (также известно как M 14 или NGC 6402) — шаровое звёздное скопление в созвездии Змееносца.Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.
WikiSort.org - проект по пересортировке и дополнению контента Википедии