GGCs database: globular cluster NGC 6779

Release 11.12 ("Hergest Ridge")

Selected: M 56

Parameters
Positional Parameters
cluster	NGC 6779
name	M 56
RA	19 16 35.57
Declination	+30 11 00.5
Galactic longitude	62.66
Galactic latitude	8.34
R sun	9.4
R gc	9.2
X	4.3
Y	8.3
Z	1.4
Photometric Parameters
E (B-V)	0.26
V HB	16.18
(m-M)	15.68
Vt	8.27
MVt	-7.41
(U-B)	0.15
(B-V)	0.86
(V-I)	1.16
S_RR	2.2
HBR	0.98
hbt	1
Structural Parameters
[Fe / H]	-1.98
SpT	F5
v_r	-135.6
err	0.9
v_LSR	-119.1
c	1.38
r_c	0.44
r_h	1.1
r_t	8.56
lg(tc)	8.33
lg(th)	9.01
mu_V	18.08
rho_v	3.28
Color-magnitude diagrams
author	Ivanov, Valentin D.; Borissova, Jordanka; Alonso-Herrero, Almudena; Russeva, Tatiana
title	Extending the Red Giant Branch versus Metallicity Calibration toward Metal-poor Systems: Near-Infrared Photometry of the Galactic Globular Clusters M56 and M15
journal	The Astronomical Journal, Volume 119, Issue 5, pp. 2274-2281 (2000)
CM diagram
Credits	CMD from Padova database

Description of NGC 6779
Messier 56 (also known as M56 or NGC 6779) is a globular cluster in the constellation Lyra. It was discovered by Charles Messier in 1779. M56 is at a distance of about 32,900 light-years from Earth and measures roughly 84 light-years across. The brightest stars in M56 are of 13th magnitude while it contains only about a dozen known variable stars like V6 (RV Tauri star; period: 90 days) or V1 (Cepheid: 1.510 days); other variable stars are V2 (irregular) and V3 (semiregular). Source: Wikipedia \| Notify inaccuracies
Image
Image of the cluster from the Digital Sky Survey
Other Resources for NGC 6779

ADS "Object Search"
SEDS data
Web Links for this cluster (2 links in the database at the moment)
Users comments for this cluster (0 comments in the database at the moment)
Selected biblio
Paper n. 1
Garner, David On Another Wavelength: M56 - A Globular Cluster in Lyra 2011, Journal of the Royal Astronomical Society of Canada, Vol. 105, No. 5, p.209 (NGC 6779 )
Paper n. 2
Pietrukowicz, P. et al. CURiuos Variables Experiment (CURVE): Variable Stars in the Metal-Poor Globular Cluster M56 2008, Acta Astronomica, vol. 58, pp. 121-130 (NGC 6779 )
Paper n. 3
Hatzidimitriou, D. et al. BVRI photometry of the galactic globular cluster NGC 6779 2004, MNRAS, Volume 348, Issue 4, pp. 1157-1163 (NGC 6779 )
*See all items (6 papers) :: Submit a paper*
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Query processed at 15:04, 24th April
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