Release 11.12 ("Hergest Ridge")


Selected: NGC 6981

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Parameters
Positional Parameters
clusterNGC 6981
nameM 72
RA20 53 27.70
Declination-12 32 14.3
Galactic longitude35.16
Galactic latitude-32.68
R sun17
R gc12.9
X11.7
Y8.3
Z-9.2
Photometric Parameters
E (B-V)0.05
V HB16.9
(m-M)16.31
Vt9.27
MVt-7.04
(U-B)0.14
(B-V)0.72
(V-R)0.45
(V-I)0.94
S_RR38.2
HBR0.14
hbt4
Structural Parameters
[Fe / H]-1.42
SpT F7
v_r-345
err3.7
v_LSR-336.2
c1.21
r_c0.46
r_h0.93
r_t9.15
lg(tc)8.72
lg(th)9.23
mu_V19.02
rho_v2.38
Color-magnitude diagrams
authorDickens, R. J.
titleThe colour-magnitude diagram of the globular cluster NGC 6981
journalMon. Not. R. Astr. Soc. 157, 281
CM diagram
Description of NGC 6981

Messier 72 (also known as M72 or NGC 6981) is a globular cluster in the Aquarius constellation discovered by Pierre Mechain in August 29, 1780.

Charles Messier looked for it on the following October 4 and 5, and included it in his catalog. Both decided that it was a faint nebula not a cluster as is now believed.

Source: Wikipedia | Notify inaccuracies

Image

Image of the cluster from the Digital Sky Survey

Other Resources
for NGC 6981
ADS "Object Search"
SEDS data
Web Links for this cluster
(2 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
Bramich, D. M.; Figuera Jaimes, R.; Giridhar, Sunetra; Arellano Ferro, A.
CCD time-series photometry of the globular cluster NGC 6981: variable star census and physical parameter estimates
2011, MNRAS, Vol. 413, pp. 1275-1294.
(NGC 6981 )
Paper n. 2
Dickens, R. J.
The colour-magnitude diagram of the globular cluster NGC 6981
1972, Mon. Not. R. Astr. Soc. 157, 281
(NGC 6981 cmd )
Paper n. 3
Shapley, H.; Ritchie, M.
Studies based on the colors and magnitudes in stellar clusters. XVIII. The periods and lightcurves of 26 cepheid variables in Messier 72.
1920, Astrophysical Journal, 52, 232-247
(NGC 6981 )
See all items (3 papers) :: Submit a paper
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Query processed at 09:06, 22nd August
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