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
(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
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 )
Paper n. 2
Catelan, M et al.
M75, A Globular Cluster with a Trimodal Horizontal Branch. I. Color-Magnitude Diagram
2002, The Astronomical Journal, Volume 124, Issue 1, pp. 364-378.
(NGC 6864 cmd )
See all items (2 papers) :: Submit a paper
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Query processed at 09:48, 20th February
This page has been visited 8585 times, since Oct 25 2004

Page updated: 2007-06-21



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