Release 11.12 ("Hergest Ridge")


Selected: NGC 6642

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Parameters
Positional Parameters
clusterNGC 6642
RA18 31 54.10
Declination-23 28 30.7
Galactic longitude9.81
Galactic latitude-6.44
R sun8.1
R gc1.7
X8
Y1.4
Z-0.9
Photometric Parameters
E (B-V)0.4
V HB16.4
(m-M)15.79
Vt9.13
MVt-6.66
(U-B)0.57
(B-V)1.11
(V-R)0.72
(V-I)1.45
S_RR31.3
hbt3
Structural Parameters
[Fe / H]-1.26
SpT F8
v_r-57.2
err5.4
v_LSR-47.3
c1.99
r_c0.1
r_h0.73
r_t10.07
lg(tc)6.95
lg(th)8.52
mu_V16.82
rho_v4.64
Color-magnitude diagrams
authorBarbuy, B.; Bica, E.; Ortolani, S.; Bonatto, C.
titleSOAR BVI photometry of the metal-poor bulge globular cluster NGC 6642
journalAstronomy and Astrophysics, Volume 449, Issue 3, pp.1019-1024
CM diagram
CreditsCMD: HST snapshot from Padova database

Description of NGC 6642

This globular was discovered by William Herschel on August 7, 1784, and cataloged by him as H II.205.

Source: SEDS | Notify inaccuracies

Image

Image of the cluster from the Digital Sky Survey

Other Resources
for NGC 6642
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
Balbinot, E.; Santiago, B. X.; Bica, E.; Bonatto, C.
The globular cluster NGC 6642: evidence for a depleted mass function in a very old cluster
2009, MNRAS, Vol. 396, Issue 3, pp. 1596-1602
(NGC 6642 )
Paper n. 2
Barbuy, B.; Bica, E.; Ortolani, S.; Bonatto, C.
SOAR BVI photometry of the metal-poor bulge globular cluster NGC 6642
2006, Astronomy and Astrophysics, Volume 449, Issue 3, pp.1019-1024
(NGC 6642 )
Paper n. 3
Minniti, D.
Spectroscopy and IR photometry for giant stars in obscured globular clusters:
NGC 6325, NGC 6401, NGC 6440, NGC 6517, NGC 6642, HP 1 and PAL 6.

1995, Astronomy and Astrophysics, v.303, p.468 (1995)
(NGC 6642 cmd )
See all items (5 papers) :: Submit a paper
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Query processed at 09:47, 20th February
This page has been visited 3361 times, since Oct 25 2004

Page updated: 2011-03-30



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