NGC 6541

Short description: Globular cluster in the constellation Corona Australis

NGC 6541

NGC 6541, imaged by the Hubble Space Telescope

Observation data (J2000 epoch)
Class| III[1]
Constellation| Corona Australis
Right ascension|  18h 08m 02.36s[2]
Declination| –43° 42′ 53.6″[2]
Distance| 22.8 kly (7.0 kpc)[3]
Apparent magnitude (V)| 6.3
Apparent dimensions (V)| 15′
Physical characteristics
Absolute magnitude| -8.52
Mass| 5.72×105[4] M☉
Metallicity| [math]\displaystyle{ \begin{smallmatrix}\left[\ce{Fe}/\ce{H}\right]\end{smallmatrix} }[/math] = –1.53[5] dex
Estimated age| 12.93 Gyr[5]
Other designations| Caldwell 78
See also: Globular cluster, List of globular clusters

NGC 6541 (also known as Caldwell 78) is a globular cluster in the southern constellation of Corona Australis. It is estimated to be around 14 billion years old.[6]

The globular cluster was discovered by Niccolò Cacciatore at the Palermo Astronomical Observatory, Sicily, on March 19, 1826. It was independently found by James Dunlop on July 3, 1826.

The cluster is relatively small, having just 94 blue straggler stars.[7]

NGC 6541

## References

1. ↑ Shapley, Harlow; Sawyer, Helen B. (August 1927), "A Classification of Globular Clusters", Harvard College Observatory Bulletin 849 (849): 11–14, Bibcode: 1927BHarO.849...11S.
2. ↑ 2.0 2.1 Goldsbury, Ryan et al. (December 2010), "The ACS Survey of Galactic Globular Clusters. X. New Determinations of Centers for 65 Clusters", The Astronomical Journal 140 (6): 1830–1837, doi:10.1088/0004-6256/140/6/1830, Bibcode: 2010AJ....140.1830G.
3. ↑ Paust, Nathaniel E. Q. et al. (February 2010), "The ACS Survey of Galactic Globular Clusters. VIII. Effects of Environment on Globular Cluster Global Mass Functions", The Astronomical Journal 139 (2): 476–491, doi:10.1088/0004-6256/139/2/476, Bibcode: 2010AJ....139..476P.
4. ↑ Boyles, J. et al. (November 2011), "Young Radio Pulsars in Galactic Globular Clusters", The Astrophysical Journal 742 (1): 51, doi:10.1088/0004-637X/742/1/51, Bibcode: 2011ApJ...742...51B.
5. ↑ 5.0 5.1 Forbes, Duncan A.; Bridges, Terry (May 2010), "Accreted versus in situ Milky Way globular clusters", Monthly Notices of the Royal Astronomical Society 404 (3): 1203–1214, doi:10.1111/j.1365-2966.2010.16373.x, Bibcode: 2010MNRAS.404.1203F.
6. ↑ O'Meara, Stephen James (2011). Deep-Sky Companions: The Secret Deep. Cambridge, United Kingdom: Cambridge University Press. p. 322. ISBN 978-0521198769. https://books.google.com/books?id=v859bKO0A4gC&pg=PA322.
7. ↑ Raso, S.; Ferraro, F. R.; Dalessandro, E.; Lanzoni, B.; Nardiello, D.; Bellini, A.; Vesperini, E. (2017), "The "UV-route" to Search for Blue Straggler Stars in Globular Clusters: First Results from theHSTUV Legacy Survey", The Astrophysical Journal 839 (1): 64, doi:10.3847/1538-4357/aa6891, Bibcode: 2017ApJ...839...64R

## External links

* NGC 6541 at SEDS NGC objects pages
* NGC 6541 at DOCdb (Deep Sky Observer's Companion)
*   * NGC 6541 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images

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Astronomical catalogs

NGC|

* Astronomy:NGC 6536
* Astronomy:NGC 6537
* Astronomy:NGC 6538
* Astronomy:NGC 6539
* Astronomy:NGC 6540
* NGC 6541
* Astronomy:NGC 6542
* Astronomy:NGC 6543
* Astronomy:NGC 6544
* Astronomy:NGC 6545
* Astronomy:NGC 6546

Caldwell|

* C69
* C70
* C71
* C72
* C73
* C74
* C75
* C76
* C77
* C78
* C79
* C80
* C81
* C82
* C83
* C84
* C85
* C86
* C87

* v
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Caldwell catalogue

List|

* C1
* C2
* C3
* C4
* C5
* C6
* C7
* C8
* C9
* C10
* C11
* C12
* C13
* C14
* C15
* C16
* C17
* C18
* C19
* C20
* C21
* C22
* C23
* C24
* C25
* C26
* C27
* C28
* C29
* C30
* C31
* C32
* C33
* C34
* C35
* C36
* C37
* C38
* C39
* C40
* C41
* C42
* C43
* C44
* C45
* C46
* C47
* C48
* C49
* C50
* C51
* C52
* C53
* C54
* C55
* C56
* C57
* C58
* C59
* C60
* C61
* C62
* C63
* C64
* C65
* C66
* C67
* C68
* C69
* C70
* C71
* C72
* C73
* C74
* C75
* C76
* C77
* C78
* C79
* C80
* C81
* C82
* C83
* C84
* C85
* C86
* C87
* C88
* C89
* C90
* C91
* C92
* C93
* C94
* C95
* C96
* C97
* C98
* C99
* C100
* C101
* C102
* C103
* C104
* C105
* C106
* C107
* C108
* C109

See also|

* Messier Catalogue
* Catalogue of Nebulae and Clusters of Stars
* New General Catalogue
* Index Catalogue
* Revised New General Catalogue
* Herschel 400 Catalogue

* Caldwell catalogue
* Category:Caldwell objects Astronomy
* Commons:Caldwell objects

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Corona Australis constellation

Stars (list)|

| Bayer|

* α (Meridiana)
* β
* γ
* δ
* ε
* ζ
* η1
* η2
* θ
* κ1
* κ2
* λ
* μ
* σ Tel

|

Variable|

* R
* S
* T
* V
* Y
* TY
* WX
* V394
* V686
* V692
* V693
* V694
* V701
* V718

HR|

* 6749
* 6787
* 6818
* 6839
* 6856
* 6862
* 6910
* 6915
* 6931
* 6937
* 6942
* 6948
* 7031
* 7122
* 7136
* 7156
* 7177
* 7232
* 7255
* 7257
* 7268
* 7281

HD|

* 166724
* 174152
* 174407
* 175093
* 175395
* 176270

Other|

* 2A 1822-371
* RX J1856.5−3754

Star clusters|

| Open|

* Coronet cluster

|

Globular|

* NGC 6541

Molecular clouds|

* Corona Australis Cloud

Nebulae|

| Reflection|

* NGC 6726
* NGC 6727
* NGC 6729

|

Planetary|

* IC 1297

Galaxies|

* NGC 6768

Coordinates:  18h 08m 02s, −43° 53′ 00″

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