Release 11.12 ("Hergest Ridge")

Selected: NGC 6402

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Positional Parameters
clusterNGC 6402
nameM 14
RA17 37 36.10
Declination-03 14 45.3
Galactic longitude21.32
Galactic latitude14.81
R sun9.3
R gc4
Photometric Parameters
E (B-V)0.6
V HB17.3
Structural Parameters
[Fe / H]-1.28
SpT F4
Color-magnitude diagrams
authorSmith Kogon, Christine; Wehlau, Ainelia; Demers, Serge
titleThe color-magnitude diagram of M14
journalAstronomical Journal, Vol. 79, p. 387
CM diagram
CreditsCMD: HST snapshot from Padova database

Description of NGC 6402

Messier 14 (also known as M14 or NGC 6402) is a globular cluster in the constellation Ophiuchus. It was discovered by Charles Messier in 1764.

At a distance of about 30,000 light-years, M14 contains several 100,000 stars. At a brightness of magnitude 7.6 it can be easily observed with binoculars and medium sized telescopes begin to show some hint of the individual stars of which the brightest is of magnitude +14.

The total luminosity of M14 is in the order of 400,000 times that of the Sun corresponding to an absolute magnitude of -9.12. The shape of the cluster is decidedly elongated. M14 spans about 100 light-years across.

A respectable total of 70 variable stars are known in M14, many of the W Virginis variety common in globular clusters.

In 1938, a nova appeared in this globular cluster although this was not discovered until photographic plates from that time were studied in 1964.

Source: Wikipedia | Notify inaccuracies


Image of the cluster from the Digital Sky Survey

Other Resources
for NGC 6402
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
Contreras Peña, C.; Catelan, M.; Grundahl, F.; Stephens, A. W.; Smith, H. A.
The Globular Cluster NGC 6402 (M14). I. A New BV Color-Magnitude Diagram
2013, The Astronomical Journal, Volume 146, Issue 3
(NGC 6402 )
Paper n. 2
Reinhart, E. D et al.
The Color-Magnitude Diagram of the Globular Cluster M14
2012, Journal of the Southeastern Association for Research in Astronomy
(NGC 6402 )
Paper n. 3
Conroy, Kyle E
Variable Stars in the Globular Cluster M14
2012, Journal of the Southeastern Association for Research in Astronomy, vol. 5, p. 34-42
(NGC 6402 )
See all items (6 papers) :: Submit a paper
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