NGC 1499

The emission gas nebula NGC 1499 (“California Nebula”) is located in constellation Perseus, at a distance of about 100 light years, the closest distance of a hydrogen emission region from the solar system. The shape of the nebula resembles the shape of the US state California. The gas is ionized hydrogen (HII), which can be prominently observed via the emission at H-alpha (656 nm). It is assumed that radiation from the nearby Star 46 zeta Persei ionizes the hydrogen cloud. NGC 1499 was imaged using my ASI camera with a set of narrowband filters, namely H-alpha, [SII] and [OIII]. These narrowband filters transmit at wavelengths of 656 nm, 672 nm and 501 nm with half width of 12 nm, respectively.

NGC 1499, California Nebula, 12 December 2022, Kempen,  Canon EF 70-200 mm f/4 L USM telelens, f = 70 mm, 

Composite of 3 narrowband filter exposures: [SII] (red) 1800 s, H-alpha 3480 s (green), and [OIII] (blue) 1800 s 

ASI1600mm pro, gain 139, T = -10C, Image processing with PixInsight V1.8.9

NGC 1499, California Nebula, 12 December 2022, Kempen,  Canon EF 70-200 mm f/4 L USM telelens, f = 70 mm, 

H-alpha (3480 s), ASI1600mm pro, gain 139, T = -10C, Image processing with PixInsight V1.8.9