Release 11.12 ("Hergest Ridge")


Selected: NGC 6809

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Parameters
Positional Parameters
clusterNGC 6809
nameM 55
RA19 39 59.71
Declination-30 57 53.1
Galactic longitude8.79
Galactic latitude-23.27
R sun5.4
R gc3.9
X4.9
Y0.8
Z-2.1
Photometric Parameters
E (B-V)0.08
V HB14.4
(m-M)13.89
Vt6.32
MVt-7.57
(U-B)0.11
(B-V)0.72
(V-R)0.48
(V-I)1
S_RR12.4
HBR0.87
hbt1
Structural Parameters
[Fe / H]-1.94
SpT F4
v_r174.7
err0.3
v_LSR181.8
c0.93
r_c1.8
r_h2.83
r_t16.28
lg(tc)8.9
lg(th)9.29
mu_V19.36
rho_v2.22
Color-magnitude diagrams
authorMandushev, Georgi I.; Fahlman, Gregory; Richer, Harvey B.; Thompson, Ian B.
titleA Photometric Study of the Globular Cluster M55
journal"Astronomical Journal", 1996, v.112, p.1536
CM diagram
Image

Image of the cluster from the Digital Sky Survey

Other Resources
for NGC 6809
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
Sariya, D. P.; Yadav, R. K. S.; Bellini, A.
Proper motions and membership probabilities of stars in the region of globular cluster NGC 6809
2012, Astronomy & Astrophysics, Volume 543, id.A87, 9 pp.
(NGC 6809 )
Paper n. 2
Lane, Richard R.
Testing Newtonian gravity with AAOmega: mass-to-light profiles and metallicity calibrations from 47 Tuc and M55
2010, MNRAS, Volume 401, Issue 4, pp. 2521-2530.
(NGC 6809 )
Paper n. 3
Lanzoni, B.; Dalessandro, E.; Perina, S.; Ferraro, F. R.; Rood, R. T.; Sollima, A.
The Surprising External Upturn of the Blue Straggler Radial Distribution in M55
2007, The Astrophysical Journal, Volume 670, Issue 2, pp. 1065-1073
(NGC 6809 )
See all items (7 papers) :: Submit a paper
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