Exposures: 75 min Ha; 75 min OIII and 60 min SII for a total of 3 hrs 30 min
Color mapped by assigning Ha to Red; OIII to blue and SII to Green
FOV = 96 x 65 arc minutes
Also known as the California Nebula, NGC 1499 is a large emission nebula. Despite the 60 minutes of exposure through a filter passing having a wavelength to detect doubly ionized oxygen, this region emits very little oxygen and is dominated by ionized hydrogen. This image shows only the "northern" 1/2 of this large nebula which spans 2.5 degrees.
1,000 light years away
Reduced to 60% of original
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