Celestial hemisphere:  Southern  ·  Constellation: Puppis (Pup)  ·  Contains:  The star v2 Pup  ·  The star π Pup

Image of the day 01/07/2025

    Variable beauty in the constellation of Puppis, Geoff Healey
    Variable beauty in the constellation of Puppis
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    Variable beauty in the constellation of Puppis

    Image of the day 01/07/2025

      Variable beauty in the constellation of Puppis, Geoff Healey
      Variable beauty in the constellation of Puppis
      Powered byPixInsight

      Variable beauty in the constellation of Puppis

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      Description

      Collinder 135 is a bright, beautiful but not often studied open cluster. It consists of six stars brighter than 6th magnitude, and a widespread population of fainter stars. It contains 3 variable stars. The background is quite rich in Hydrogen and lies in a much wider colourful star-field.The main member is Pi Puppis, a red supergiant long-period variable star about 12 times the size of our sun. The star has the traditional name Ahadi, which is derived from Arabic for "having much promise"The other 2 variable stars lie around the 4 o’clock position. The left is NV Puppis a blue magnitude 4.67 Gamma Cassiopeiae variable and to the right of that is NW Puppis also blue and a magnitude 5.1 Beta Cephei variable.

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      Variable beauty in the constellation of Puppis, Geoff Healey