Declination −37° 10′ Apparent magnitude (V) 2.1 | Right ascension 07 08 Distance ly (258 pc) Apparent dimensions (V) 50' | |
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Collinder 135, known sometimes as the Pi Puppis Cluster, is an open cluster in Puppis constellation.
It consists of four stars visible also to naked eye, and a widespread population of stars. It lies in the southern celestial hemisphere near a rich star field. The main component is the star Pi Puppis, which gives to the cluster its common name; it is an orange supergiant with a visual magnitude of 2.71. The 5th magnitude stars are all variables: one (NV Puppis) is a Gamma Cassiopeiae variable, and the other (NW Puppis) is a Beta Cephei variable.
References
Collinder 135 Wikipedia(Text) CC BY-SA