Messier 34

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For other uses, see M34 (disambiguation).

Observation data (J2000.0 epoch)
Messier 34
2MASS image of M34 (taken in infrared band; falsecolor)
Constellation	Perseus
Right ascension	02^h 42.1^m^[1]
Declination	+42° 46′^[1]
Distance	1.4 kly^{[citation needed]} (0.4 kPc)
Apparent magnitude (V)	5.5^{[citation needed]}
Apparent dimensions (V)	35.0′^{[citation needed]}
Other designations	NGC 1039^[1]
See also: Open cluster, List of open clusters

Messier 34 (also known as M 34 or NGC 1039) is an open cluster in the constellation Perseus. It was discovered by Giovanni Batista Hodierna before 1654 and included by Charles Messier in his catalog of comet-like objects in 1764.

M34 is at a distance of about 1,400 light-years away from Earth and consists of some 100 stars. It spans about 35' on the sky which translates to a true radius of 7 light years. The cluster is just visible to the naked eye in very dark conditions, well away from city lights. It is well seen in binoculars.