Your query: NGC 6638

Parameters
Positional Parameters
cluster	NGC 6638
RA	18 30 56.
Declination	-25 29 51
Galactic longitude	7.9
Galactic latitude	-7.15
R sun	9.6
R gc	2.3
X	9.4
Y	1.3
Z	-1.2
Photometric Parameters
E (B-V)	0.4
V HB	16.8
(m-M)	16.15
Vt	9.02
MVt	-6.83
(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]	-0.99
SpT	G0
v_r	18.1
err	3.9
v_LSR	29.4
c	1.4
r_c	0.26
r_h	0.66
r_t	6.63
lg(tc)	7.93
lg(th)	8.65
mu_V	17.27
rho_v	4.05
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

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

ADS "Object Search"
SEDS data

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Selected biblio
Paper n. 1
Alcaino, G.; Liller, W. The globular cluster NGC 6638 Astronomical Journal, vol. 88, Aug. 1983, p. 1166-1174 (1983) (NGC 6638 cmd )
*See all items (1 paper)*

Query processed at 21:51, 9th February
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