BBC Sky at Night

DEEP-SKY TOUR

1 M15

essier 15 is a bright globular cluster located on the border of Pegasus and Equuleus. The easiest way to locate it is to identify the star marking the top of the upsidedown flying horse’s head, Baham (Theta (θ) Pegasi) and extending a line from it through the horse’s nose marked by Enif (Epsilon (ε) Pegasi) for half the distance again. With an integrated magnitude of +6.3, M15 is easy to see in small instruments. A 150mm

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