Collinder 135
Open cluster in Puppis
From Wikipedia, the free encyclopedia
Collinder 135, known sometimes as the Pi Puppis Cluster, is an open cluster in Puppis constellation.
| Collinder 135 | |
|---|---|
Simulated image of the Pi Puppis Cluster | |
| Observation data (2000.0 epoch) | |
| Right ascension | 07h 08m [1] |
| Declination | −37° 10′[1] |
| Distance | 975 ± 36 ly (299 ± 11 pc[2]) |
| Apparent magnitude (V) | 2.1[1] |
| Apparent dimensions (V) | 50' |
| Physical characteristics | |
| Estimated age | 36 ± 5 Myr[2] |
| Other designations | Pi Puppis Cluster, Cr 135, C 0715-367 |
| Associations | |
| Constellation | Puppis |
It consists of six stars brighter than 6th magnitude, and a widespread population of fainter stars.[3] 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. Two of the 5th magnitude stars are all variables: NV Puppis is a Gamma Cassiopeiae variable, while NW Puppis is a Beta Cephei variable.
