File:M52atlas.jpg · Wikimedia Commons · See Wikimedia Commons
Also known as New General Catalogue 7654
open cluster in the constellation Cassiopeia
Wikidata facts
- Instance of
- open cluster
- Part of
- Milky Way
- Constellation
- Cassiopeia
- Distance from Earth
- 1421
- Radius
- 9.5
- Image
- M52atlas.jpg
Show 14 more facts
- Commons category
- Messier 52
- catalog code
- [KPS2012] MWSC 3725
- Commons gallery
- Messier 52
- discoverer or inventor
- Charles Messier
- time of discovery or invention
- 1774-00-00
- apparent magnitude
- 7.3
- spectral class
- e
- right ascension
- 351.2000
- declination
- 61.5933
- radial velocity
- -40.0
- epoch
- J2000.0
- right ascension component of proper motion
- -2.77
- declination component of proper motion
- -1.18
- different from
- NGC 7635
Sources (2)
via Wikidata · CC0
~2 min read
Encyclopedic overview
Messier 52 or M52, also known as NGC 7654 or the Scorpion Cluster, is an open cluster of stars in the highly northern constellation of Cassiopeia. It was discovered by Charles Messier in 1774. It can be seen from Earth under a good night sky with binoculars. The brightness of the cluster is influenced by extinction, which is stronger in the southern half. Its metallicity is somewhat below that of the Sun, and is estimated to be [Fe/H] = −0.05 ± 0.01.
R. J. Trumpler classified the cluster appearance as II2r, indicating a rich cluster with little central concentration and a medium range in the brightness of the stars. This was later revised to I2r, denoting a dense core. The cluster has a core radius of 2.97 ± 0.46 ly (0.91 ± 0.14 pc) and a tidal radius of 42.7 ± 7.2 ly (13.1 ± 2.2 pc). It has an estimated age of 158.5 million years and a mass of 1,200 M☉.
Excerpted from Wikipedia’s “M52” article, available under the CC BY-SA 4.0 licence.