|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.
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(2 links in the database at the moment)
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|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 )
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