GGCs database: globular cluster NGC 6809

Release 11.12 ("Hergest Ridge")

Selected: NGC 6809

Parameters
Positional Parameters
cluster	NGC 6809
name	M 55
RA	19 39 59.71
Declination	-30 57 53.1
Galactic longitude	8.79
Galactic latitude	-23.27
R sun	5.4
R gc	3.9
X	4.9
Y	0.8
Z	-2.1
Photometric Parameters
E (B-V)	0.08
V HB	14.4
(m-M)	13.89
Vt	6.32
MVt	-7.57
(U-B)	0.11
(B-V)	0.72
(V-R)	0.48
(V-I)	1
S_RR	12.4
HBR	0.87
hbt	1
Structural Parameters
[Fe / H]	-1.94
SpT	F4
v_r	174.7
err	0.3
v_LSR	181.8
c	0.93
r_c	1.8
r_h	2.83
r_t	16.28
lg(tc)	8.9
lg(th)	9.29
mu_V	19.36
rho_v	2.22
Color-magnitude diagrams
author	Mandushev, Georgi I.; Fahlman, Gregory; Richer, Harvey B.; Thompson, Ian B.
title	A Photometric Study of the Globular Cluster M55
journal	"Astronomical Journal", 1996, v.112, p.1536
CM diagram

Image
Image of the cluster from the Digital Sky Survey
Other Resources for NGC 6809

ADS "Object Search"
SEDS data
Web Links for this cluster (1 link in the database at the moment)
Users comments for this cluster (0 comments in the database at the moment)
Selected biblio
Paper n. 1
Sariya, D. P.; Yadav, R. K. S.; Bellini, A. Proper motions and membership probabilities of stars in the region of globular cluster NGC 6809 2012, Astronomy & Astrophysics, Volume 543, id.A87, 9 pp. (NGC 6809 )
Paper n. 2
Lane, Richard R. Testing Newtonian gravity with AAOmega: mass-to-light profiles and metallicity calibrations from 47 Tuc and M55 2010, MNRAS, Volume 401, Issue 4, pp. 2521-2530. (NGC 6809 )
Paper n. 3
Lanzoni, B.; Dalessandro, E.; Perina, S.; Ferraro, F. R.; Rood, R. T.; Sollima, A. The Surprising External Upturn of the Blue Straggler Radial Distribution in M55 2007, The Astrophysical Journal, Volume 670, Issue 2, pp. 1065-1073 (NGC 6809 )
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Query processed at 07:00, 24th March
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