Your query: M 22

Parameters
Positional Parameters
cluster	NGC 6656
name	M 22
RA	18 36 24.
Declination	-23 54 12
Galactic longitude	9.89
Galactic latitude	-7.55
R sun	3.2
R gc	4.9
X	3.1
Y	0.5
Z	-0.4
Photometric Parameters
E (B-V)	0.34
V HB	14.15
(m-M)	13.6
Vt	5.1
MVt	-8.5
(U-B)	0.28
(B-V)	0.98
(V-R)	0.68
(V-I)	1.42
S_RR	7.2
HBR	0.91
hbt	2
Structural Parameters
[Fe / H]	-1.64
SpT	F5
v_r	-148.9
err	0.4
v_LSR	-137.2
c	1.31
r_c	1.42
r_h	3.26
r_t	28.97
lg(tc)	8.62
lg(th)	9.22
mu_V	17.32
rho_v	3.64
Color-magnitude diagrams
author	Samus, N.; Kravtsov, V.; Pavlov, M.; Alcaino, G.; Liller, W.
title	A new photographic color-magnitude study of M22 = NGC 6656.
journal	Astron. Astrophys. Suppl. 109, 487-499 (1995)
CM diagram
Credits	CMD from Padova database

Description of NGC 6656
Messier 22 (also known as M22 or NGC 6656) is an elliptical globular cluster in the constellation Sagittarius near the Galactic bulge region. It is one of the brightest globulars that is visible in the night sky. M22 was one of the first globulars to be discovered in 1665 by Abraham Ihle and it was included in Charles Messier's catalog of comet-like objects on June 5, 1764. Source: Wikipedia \| Notify inaccuracies
DSS image
Image of the cluster from the Digital Sky Survey
Other Resources for NGC 6656

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
Samus, N.; Kravtsov, V.; Pavlov, M.; Alcaino, G.; Liller, W. A new photographic color-magnitude study of M22 = NGC 6656. Astron. Astrophys. Suppl. 109, 487-499 (1995) (NGC 6656 cmd )
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Query processed at 21:22, 9th February
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