Sh 2-1

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Sh 2-1
Reflection nebula
Sharpless 1 (Sh2-1).jpg
Sharpless 1 (red emission nebula mixed with the reflection nebula (vdB 99) around Pi Scorpii and LBN 1094 (south of Pi Scorpii). To the east of Sh2-1 are LBN 1092 and LBN 1093.
Observation data: J2000 epoch
Right ascension 15h 58m 51.2s [1]
Declination −26° 07 14 [1]
Distance650 [2]   ly    (200  pc)
Apparent dimensions (V)2° 30' [1]
Constellation Scorpius
Designations Sh 2-1
See also: Lists of nebulae

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, Pi Scorpii, [3] 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. [4] The remnant[ clarification needed ] has an apparent diameter that covers approximately 150' and an estimated distance of approximately 650ly away.

References

  1. 1 2 3 "VizieR Detailed Page". Centre de Données astronomiques de Strasbourg. 20 December 2013.
  2. "Sh 2-1". Galaxy Map. 16 September 2013.
  3. https://www.friendsofnasa.org/2025/06/sharpless-1-nebula-in-scorpius-with.html
  4. "CCD Images of the Sharpless Catalog". Dean Salman. 20 December 2013.