M 34

Messier 34 (also known as M34, NGC 1039, or the Spiral Cluster) is a large and relatively near open cluster in Perseus. It was probably discovered by Giovanni Batista Hodierna before 1654. M34 is about 470 parsecs (1,500 ly) away. The cluster has about 400 stars ranging from 0.12 to 1 solar mass, . It spans about 35′ on the sky which translates to a true radius of 7.5 light years at such distance. The age of this cluster lies between the ages of the Pleiades open cluster at 100 million years and the Hyades open cluster at 800 million years. At least 19 members are white dwarfs. 

Open star cluster M34, 3 November 2024, Kempen, William Optics 110 mm APO FLT f/7, 

L  (2400 s), R (1800 s), G (1800 s), B (1800s), ASI1600mm pro, gain = 139, T = -10º C, PixInsight 1.8.9

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