Release 11.12 ("Hergest Ridge")


Selected: NGC 6864

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Parameters
Positional Parameters
clusterNGC 6864
nameM 75
RA20 06 04.69
Declination-21 55 16.2
Galactic longitude20.3
Galactic latitude-25.75
R sun20.9
R gc14.7
X17.6
Y6.5
Z-9.1
Photometric Parameters
E (B-V)0.16
V HB17.7
(m-M)17.09
Vt8.52
MVt-8.57
(U-B)0.28
(B-V)0.87
(V-R)0.55
(V-I)1.16
S_RR8.3
HBR-0.07
hbt1
Structural Parameters
[Fe / H]-1.29
SpT F9
v_r-189.3
err3.6
v_LSR-180.8
c1.8
r_c0.09
r_h0.46
r_t7.28
lg(tc)7.89
lg(th)9.15
mu_V15.52
rho_v4.51
Color-magnitude diagrams
authorCatelan, M et al.
titleM75, A Globular Cluster with a Trimodal Horizontal Branch. I. Color-Magnitude Diagram
journalThe Astronomical Journal, Volume 124, Issue 1, pp. 364-378.
CM diagram

Description of NGC 6864

Messier 75 (also known as M75 or NGC 6864) is a globular cluster in the constellation Sagittarius. It was discovered by Pierre Mechain in 1780 and included in Charles Messier's catalog of comet-like objects that same year.

M75 is at a distance of about 67,500 light years away from Earth and its apparent size on the sky translates to a true radius of some 67 light years

Source: Wikipedia | Notify inaccuracies

Image

Image of the cluster from the Digital Sky Survey

Other Resources
for NGC 6864
ADS "Object Search"
SEDS data
Web Links for this cluster
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Users comments for this cluster
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Selected biblio
Paper n. 1
Kacharov, N.; Koch, A.; McWilliam, A.
A comprehensive chemical abundance study of the outer halo globular cluster M 75
2013, Astronomy & Astrophysics, Volume 554, 15 pp
(NGC 6864 )
Paper n. 2
Contreras Ramos, R.; Ferraro, F. R.; Dalessandro, E.; Lanzoni, B.; Rood, R. T.
The Unimodal Distribution of Blue Straggler Stars in M75 (NGC 6864)
2012, The Astrophysical Journal, Volume 748, Issue 2, 9 pp.
(NGC 6864 )
Paper n. 3
V. Kravtsov, G. Alcaino, G. Marconi, and F. Alvarado
Multi-color photometry of the Galactic globular cluster M 75 = NGC 6864. A new sensitive metallicity indicator and the position of the horizontal branch in UV
2007, A&A 469, 529-537 (2007)
(NGC 6864 )
See all items (4 papers) :: Submit a paper
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Query processed at 16:34, 19th April
This page has been visited 16327 times, since Oct 25 2004

Page updated: 2007-06-21



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