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]
| Reflection nebula | |
|---|---|
.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] |
| Distance | 650[2] ly (200 pc) |
| Apparent dimensions (V) | 2° 30'[1] |
| Constellation | Scorpius |
| Designations | Sh 2-1 |
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
edit- ^ a b c "VizieR Detailed Page". Centre de Données astronomiques de Strasbourg. 20 December 2013.
- ^ "Sh 2-1". Galaxy Map. 16 September 2013.
- ^ "CCD Images of the Sharpless Catalog". Dean Salman. 20 December 2013.
External links
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