GGCs database: globular cluster NGC 6638

Release 11.12 ("Hergest Ridge")

Selected: NGC 6638

Parameters
Positional Parameters
cluster	NGC 6638
RA	18 30 56.10
Declination	-25 29 50.9
Galactic longitude	7.9
Galactic latitude	-7.15
R sun	9.4
R gc	2.2
X	9.3
Y	1.3
Z	-1.2
Photometric Parameters
E (B-V)	0.41
V HB	16.8
(m-M)	16.14
Vt	9.02
MVt	-7.12
(U-B)	0.56
(B-V)	1.15
(V-R)	0.72
(V-I)	1.5
S_RR	18.3
HBR	-0.3
hbt	4
Structural Parameters
[Fe / H]	-0.95
SpT	G0
v_r	18.1
err	3.9
v_LSR	27.5
c	1.33
r_c	0.22
r_h	0.51
r_t	6.63
lg(tc)	7.83
lg(th)	8.46
mu_V	17.3
rho_v	4.09
Color-magnitude diagrams
author	Alcaino, G.; Liller, W.
title	The globular cluster NGC 6638
journal	Astronomical Journal, vol. 88, Aug. 1983, p. 1166-1174 (1983)
CM diagram
Credits	CMD from Padova database

Image
Image of the cluster from the Digital Sky Survey
Other Resources for NGC 6638

ADS "Object Search"
SEDS data
Web Links for this cluster (0 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
Valenti, E.; Origlia, L.; Ferraro, F. R. Near-infrared photometry of four metal-rich bulge globular clusters: NGC 6304, 6569, 6637 and 6638 2005, Monthly Notices of the Royal Astronomical Society, Volume 361, Issue 1, pp. 272-282 (NGC 6304 NGC 6569 NGC 6638 )
Paper n. 2
Alcaino, G.; Liller, W. The globular cluster NGC 6638 1983, Astronomical Journal, vol. 88, Aug. 1983, p. 1166-1174 (1983) (NGC 6638 cmd )
*See all items (2 papers) :: Submit a paper*
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Query processed at 15:58, 20th September
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