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NGC 1491
NGC 1491 (also catalogued as LBN 704 and Sh2-206) is an emission nebula in the constellation Perseus.This is an H II region located on the edge of a vast cloud region of neutral gas. The source of ionization of the gas in the cloud comes from the stellar wind of the star BD +50 ° 886, a blue mag. 11.2 star of spectral type O5.
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Technical Details: |
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| Optics: | ASA N12 Astrograph at F/3.6 |
| Mount: | ASA DDM 85 |
| Camera: | SBIG STL-11000M |
| Filters: | Astronomik LRGB filter set, Baader Ha 8 nm filter |
| Dates/Times: | 10, 11 September 2012 |
| Location: | Rozhen |
| Exposure Details: | L = 180 min, Ha = 90 min, R = 160 min., G = 170 min., B = 190 min. |
| Subexposures: | LRGB = 10 minutes, Ha = 15 minutes |
| Acquisition: | CCD Soft |
| Processing: | PixInsight, Photoshop CS |