Back سديم كيس الفحم Arabic Caldwell 99 BS Nebulosa del Sac de Carbó Catalan Mlhovina Uhelný pytel Czech Kohlensack German Νεφέλωμα Σάκος Ανθράκων Greek Nebulosa Saco de Carbón Spanish Ikatz Zaku Nebulosa Basque Hiilisäkki Finnish Sac de charbon French
| Dark nebula | |
|---|---|
 The Coalsack Nebula taken by the Wide Field Imager on the MPG/ESO 2.2-metre telescope[1] | |
| Observation data: J2000.0 epoch | |
| Right ascension | 12h 50m |
| Declination | −62° 30′ |
| Distance | 180[2] pc |
| Apparent magnitude (V) | – |
| Apparent dimensions (V) | 7° × 5° |
| Constellation | Crux |
| Physical characteristics | |
| Radius | 30–35 ly |
| Absolute magnitude (V) | – |
| Notable features | – |
| Designations | Caldwell 99 |
The Coalsack Nebula (Southern Coalsack, or simply the Coalsack)[3] is a dark nebula, which is visible to the naked eye as a dark patch obscuring part of the Milky Way east of Acrux (Alpha Crucis) in the constellation of Crux.[2]
- ^ "A Cosmic Sackful of Black Coal". Retrieved 15 October 2015.
- ^ a b Franco, G.P.A. (2000). "Interstellar Na I D lines towards the Southern Coalsack". Monthly Notices of the Royal Astronomical Society. 315 (3): 611–621. Bibcode:2000MNRAS.315..611F. doi:10.1046/j.1365-8711.2000.03434.x.
- ^ "Coalsack Nebula". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-09-30.
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