NGC 6834
| NGC 6834 | |
|---|---|
 | |
| Observation data (J2000.0epoch) | |
| Right ascension | 19h52m12.5s[1] |
| Declination | +29° 24′ 29″[1] |
| Distance | 10,850ly(3,326.7pc)[2] |
| Apparent magnitude(V) | 7.8[3] |
| Apparent dimensions (V) | 12′[2] |
| Physical characteristics | |
| Radius | 6.1 ly |
| Estimated age | 65±18Myr[4] |
| Other designations | NGC 6834, C 1950+292[5] |
| Associations | |
| Constellation | Cygnus |
NGC 6834is a young[6]open clusterofstarslocated about 10,850[2]light yearsfrom theSunin theconstellationCygnus.It was discovered on July 17, 1784, by Anglo-German astronomerWilliam Herschel.[7]The cluster has avisual magnitudeof 7.8, which is dimmed by 2.1 magnitudes due tointerstellar dust.[3]Half the cluster members lie within anangular radiusof6′.[2]
TheTrumpler classof this cluster isII 2 m,indicating it is medium-rich in stars (m) with a moderate brightness range (2) and little central concentration of the stars (II).[6]It has about 260 members[2]and an age of approximately 65 million years,[4]although estimates range from 50 to 80 million.[6]A total of fifteenB-typevariable starshave been detected in the cluster with fourBe stars.Five of the cluster members showhydrogen alphaemission, including aγ Casand twoλ Erivariables.[6]
References
[edit]- ^abKerber, F.; et al. (September 2003)."Galactic Planetary Nebulae and their central stars. I. An accurate and homogeneous set of coordinates".Astronomy and Astrophysics.408(3): 1029–1035.Bibcode:2003A&A...408.1029K.doi:10.1051/0004-6361:20031046.
- ^abcdeCantat-Gaudin, T.; Anders, F. (January 2020). "Clusters and mirages: cataloguing stellar aggregates in the Milky Way".Astronomy & Astrophysics.633:22.arXiv:1911.07075.Bibcode:2020A&A...633A..99C.doi:10.1051/0004-6361/201936691.S2CID208138247.A99.
- ^abCrossen, Craig; Rhemann, Gerald (2012).Sky Vistas: Astronomy for Binoculars and Richest-Field Telescopes.Springer Vienna. p. 68.ISBN9783709106266.
- ^abPaunzen, E.; Netopil, M. (October 2006). "On the current status of open-cluster parameters".Monthly Notices of the Royal Astronomical Society.371(4): 1641–1647.arXiv:astro-ph/0607421.Bibcode:2006MNRAS.371.1641P.doi:10.1111/j.1365-2966.2006.10783.x.S2CID15047964.
- ^"NGC 6834".SIMBAD.Centre de données astronomiques de Strasbourg.Retrieved2022-01-07.
- ^abcdMathew, Blesson; et al. (September 2014). "Optical/IR studies of Be stars in NGC 6834 with emphasis on two specific stars".Research in Astronomy and Astrophysics.14(9): 1173–1192.arXiv:1408.6658.Bibcode:2014RAA....14.1173M.doi:10.1088/1674-4527/14/9/008.S2CID118378570.1173-1192.
- ^Seligman, Courtney."NGC Objects: NGC 6800 - 6849".Celestial Atlas.Retrieved2022-01-08.
External links
[edit]
Media related toNGC 6834at Wikimedia Commons
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