Coalsack Nebula
The Coalsack Nebula (Southern Coalsack, or simply the Coalsack) 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.
| Dark nebula | |
|---|---|
The Coalsack Nebula taken by the Wide Field Imager on the MPG/ESO 2.2-metre telescope | |
| Observation data: J2000.0 epoch | |
| Right ascension | 12h 50m |
| Declination | −62° 30′ |
| Distance | 180 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 |
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