Sh 2-1, also known as Sharpless 1, is the combination of a diffuse HII emission nebula and reflection nebula in the constellation of Scorpius with Pi Scorpii at its center. It appears as a modest brightness making it one of the easier Sharpless catalog objects for amateur astronomers to view. It features an apparent central star[which?] inside the nebulosity however it is not part its system nor a left over remnant.[citation needed]

The nebulous area is fairly large with an irregular shape appearing as a 180° arc shape surrounding a central star.[3] The remnant[clarification needed] has an apparent diameter that covers approximately 150' and an estimated distance of approximately 650ly away.

References

  1. ^ a b c "VizieR Detailed Page". Centre de Données astronomiques de Strasbourg. 20 December 2013.
  2. ^ "Sh 2-1". Galaxy Map. 16 September 2013.
  3. ^ "CCD Images of the Sharpless Catalog". Dean Salman. 20 December 2013.


Allikas: http://en.wikipedia.org/wiki/Sh_2-1
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