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| Emission nebula | |
|---|---|
The nebula NGC 1491 | |
| Observation data:J2000epoch | |
| Subtype | H II region |
| Right ascension | 04h 03m 15.9s[1] |
| Declination | +51° 18′ 54″[1] |
| Distance | 3.02 ± 0.6 kpc (9,800 ± 2,000 ly)[1] ly |
| Apparent dimensions (V) | ~1½°[2] |
| Constellation | Perseus |
| Designations | Ced 25, LBN 704, LBN 706, Sharpless 2-206,[1] Little Pacman Nebula[3] |
| See also:Lists of nebulae | |
NGC 1491, also known asLBN 704,SH2-206 or theFossil Footprint Nebula, is anemission typebright nebula located about 9,800 light years away fromEarth in the constellation ofPerseus.[1] It was discovered on 23 December 1790 byWilliam Herschel.
Thenebula gets its deep red coloration due to many massivestars (such asBD+50 866) embedded within NGC 1491 producing large amounts ofultraviolet radiation andionizing thehydrogen gas that makes up thenebula.[4][5]
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