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.



Technical Details:

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

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