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Post Info TOPIC: NGC 6426


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GCL 76
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NGC 6426 (also GCL 76 and C 1742+031) is a magnitude +11.0 globular cluster located 67,200 light-years away in the constellation Ophiuchus.

The cluster was discovered by German-British astronomer William Herschel using a 47.5 cm (18.7 inch) f/13 speculum reflector at Windsor Road, Slough, on the 3rd June 1786.

Right ascension 17h 44m 54.71s, Declination +3 10' 12.5"

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Posts: 131433
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NGC 6426
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Title: A CH star in the globular cluster NGC 6426
Authors: M. Sharina, B. Aringer, E. Davoust, A. Y. Kniazev, C. J. Donzelli

We report on the serendipitous discovery of a carbon star near the centre of the low-metallicity globular cluster NGC 6426. We determined its membership and chemical properties using medium-resolution spectra. The radial velocity of -159 km/s makes it a member of the cluster. We used photometric data from the literature and the COMARCS stellar atmospheric models to derive its luminosity, effective temperature, surface gravity, metallicity, and approximate C, N, and O abundance ratios. According to these properties, we suggest that this star is a genuine carbon rich low-metallicity AGB star.

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