| 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 pc2) |
| Apparent magnitude (V) | 2.11 |
| Apparent dimensions (V) | 50' |
| Physical characteristics | |
| Estimated age | 36 ± 5 Myr2 |
| Other designations | Pi Puppis Cluster, Cr 135, C 0715-367 |
| Associations | |
| Constellation | Puppis |
Collinder 135, known sometimes as the Pi Puppis Cluster, is an open cluster in Puppis constellation.
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.
References
References
- "Cl Collinder 135". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2011-08-15.
- Karagöz, Hülya; Çınar, Deniz Cennet; Taşdemir, Seval; Canbay, Remziye (2025). "Close Binary Open Cluster Systems: A Gaia DR3 Perspective on Alessi 36 and Collinder 135". Bitlis Eren Üniversitesi Fen Bilimleri Dergisi. 14 (3): 1942–1960. arXiv:2509.14308. Bibcode:2025BEUJS..14.1942K. doi:10.17798/bitlisfen.1740843.
- H. Baumgardt (1998). "The Nature of some doubtful Open Clusters as revealed by Hipparcos". Astronomy and Astrophysics. 340: 402. Bibcode:1998A&A...340..402B.