Celestial hemisphere:  Southern  ·  Constellation: Ophiuchus (Oph)  ·  Contains:  M 12  ·  NGC 6218
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M 12, Roberto Marinoni
M 12
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Getting plate-solving status, please wait...
M 12, Roberto Marinoni
M 12
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Description

Messier 12 (NGC 6218) is a globular cluster in the constellation of Ophiuchus. 
It is about 16,400 light-years from Earth and has a diameter of about 75 light-years: its brightest stars are of 12th magnitude.
It is rather loosely packed for a globular and was once thought to be a tightly concentrated open cluster [text adapted from Wikipedia].
It is nice to see through the cluster’s stars those two faint galaxies (catalogued as PCG 1103219).

For L I did exposures of 120” but probably shorter exposures would have allowed to better reveal the stars in the core.

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