Collinder 135

Collinder 135
Observation data (2000.0 epoch)
Constellation	Puppis
Right ascension	07h 08m[1]
Declination	-37° 10′[1]
Distance	840 ly (258 pc)
Apparent magnitude (V)	2.1[1]
Apparent dimensions (V)	50'
Physical characteristics
Other designations	Pi Puppis Cluster; C 0715-367
See also: Open cluster, List of open clusters

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.^[2] 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

1. ^ ^{a b c} "Simbad Query Result". http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=collinder+135&submit=SIMBAD+search. Retrieved 2011-08-15. 
2. ^ H. Baumgardt (1998). "The Nature of some doubtful Open Clusters as revealed by Hipparcos". Astronomy and Astrophysics. http://www.ari.uni-heidelberg.de/publikationen/pap1998/1998051/fulltext/1998051.ps. Retrieved 2011-08-15. 

External links

• Observing Cr 135