Release 11.12 ("Hergest Ridge")


Selected: NGC 6401

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Parameters
Positional Parameters
clusterNGC 6401
RA17 38 36.60
Declination-23 54 34.2
Galactic longitude3.45
Galactic latitude3.98
R sun10.6
R gc2.7
X10.5
Y0.6
Z0.7
Photometric Parameters
E (B-V)0.72
V HB18
(m-M)17.35
Vt9.45
MVt-7.9
(U-B)0.93
(B-V)1.58
(V-R)1.02
(V-I)2.01
S_RR15.3
hbt2
Structural Parameters
[Fe / H]-1.02
SpT F9
v_r-65
err8.6
v_LSR-55.3
c1.69
r_c0.25
r_h1.91
r_t12.1
lg(tc)7.97
lg(th)9.53
mu_V18.7
rho_v3.79
Color-magnitude diagrams
authorBarbuy, B.; Ortolani, S.; Bica, E.; Desidera, S.
titleThe metal-rich bulge globular cluster NGC 6401
journalAstronomy and Astrophysics, v.348, p.783-788 (1999)
CM diagram
CreditsCMD from A&A website

Description of NGC 6401

Discovered by William Herschel on May 21, 1784.

This globular cluster was first taken for a bright nebula by W. Herschel, and cataloged accordingly as H I.44. John Herschel also described it as a nebula, as he apparently couldn't resolve it into stars either.

In 1977, Peterson announced the finding of another planetary nebula in the neighborhood, and perhaps associated with globular cluster NGC 6401 in Ophiuchus; this planetary nebula candidate was cataloged as Peterson 1 (Pt 1; PK 004+03.1). However, in 1990 Acker and Stenholm found that this object exhibits a red stellar continuum - thus is not a planetary nebula but a symbiotic star.

Source: Seds.org | Notify inaccuracies

Image

Image of the cluster from the Digital Sky Survey

Other Resources
for NGC 6401
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
Tsapras, Y.
Variable stars in the bulge globular cluster NGC 6401
2017, MNRAS, Volume 465, Issue 2, p.2489-2504
(NGC 6401 )
Paper n. 2
Barbuy, B.; Ortolani, S.; Bica, E.; Desidera, S.
The metal-rich bulge globular cluster NGC 6401
1999, Astronomy and Astrophysics, v.348, p.783-788 (1999)
(NGC 6401 cmd )
Paper n. 3
Terzan, A.; Rutily, B.
Globular clusters NGC 6304 and NGC 6401
1972, Astronomy and Astrophysics, Vol. 16, p. 408 - 416
(NGC 6304 NGC 6401 )
See all items (3 papers) :: Submit a paper
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Query processed at 00:26, 26th September
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