Zeta Puppis

Stellar classification



  • X 1049
  • Y -85
  • Z -256
→ Sol: 1,083

Object type

  • Pulsating variable Star
  • Star
  • Variable of BY Dra type
  • Emission-line Star
  • Infra-Red source
  • Radio-source
  • UV-emission source
  • Variable Star
  • X-ray source
simbad:* zet Pup


Zeta Puppis (ζ Puppis, abbreviated Zeta Pup, ζ Pup), also named Naos, is a star in the constellation of Puppis.

The spectral class of O4 means this is one of the hottest, and most luminous, stars visible to the naked eye. It is one of the sky's few naked-eye class O-type stars as well as one of the closest to Earth. It is a blue supergiant, one of the most luminous stars in the Milky Way. Visually it is over 10,000 times brighter than the Sun, but its high temperature means that most of its radiation is in the ultraviolet and its bolometric luminosity is over 500,000 times that of the Sun. It is also the 62nd brightest star in terms of apparent magnitude from Earth.

Naos is typical of O-type stars in having an extremely strong stellar wind, measured at 2,500 km/s, which sees the star shed more than a millionth of its mass each year, or about 10 million times that shed by the Sun over a comparable time period.

This article uses material from the Wikipedia article "Zeta Puppis", which is released under the Creative Commons Attribution-Share-Alike License 3.0.