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Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

WR 134 - 8.9.2022 at 04.00 Fregenal de la Sierra, Espanja Observation number 109344

Visibility I / V

Tapio Lahtinen, Tampereen Ursa

WR 134 is a variable Wolf-Rayet type star located about 6000 light years away.
In the image, it is the brightest white star in the center of the image.
The nebula around it (blueish in this picture) was formed when the star was in the red giant phase, when the outer layers have spread due to the star's strong radiation and stellar wind.

WR-type stars are a very rare type of star.
In 2018, only 154 of them were known in the Milky Way.
The Crescent nebula has also been born under similar conditions.

More similar observations
Additional information
  • Observation target
    • Deep space object
  • Designation
    • WR 134
  • Constellation
    • Cygnus
  • Nebulae
    • Emission nebula info

      In an emission nebula the hot stars nearby cause the gas glow. This should not mix with reflection nebula, where the gas is only lit up by nearby stars.

      The appearance of a gas nebula is irregular, and the fainter parts of it need bigger instruments to be visible.


      Emssion nebulae in Cepheus. The bigger part is composed of the nebulae Cederblad 214 (Ced214) and NGC 7822. The lower round nebula is called Sharpless 170 (Sh2-170). Image J-P Metsävainio.


      The Orion nebula. Image Samuli Vuorinen.


      In this 4-degree-field there are emission nebulae Sh2-157, Sh2-158, Sh2-159, Sh2-161 and Sh2-162 (or NGC 7635 aka Bubble Nebula) and open clusters M52 and NGC 7510. Image Juha Kepsu.


      NGC 281 aka Pacman Nebula. The object is in Cassiopeia. Image J-P Metsävainio.


      NGC 896 in Cassiopeia is the tip of Heart Nebula (IC 1805). Image Timo Inkinen.

Technical information

Sky-Watcher Esprit 100ED, 10 Micron GM 1000 HPS, Atik 460EX, 67x10m SII, 43x10m Ha, 141x10m OIII.
About 42 hours of exposure in total.

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