California Nebula, Ngc 1499
Telescope: Canon EF 135mm f/2L USM telephoto lens (f/2.8 stopped)
Camera: Baader modified Canon 400D, 800 iso, RAW mode
- Mount: Astrotrac with polar scope
- Integration: 30 x 120 sec, (19 bias, 19 dark, 19 flat)
- Date, Location, Temp/Software: December 2019, Livorno (Italy), 8°C/MaxIm-DL, PixInsight, PhotoShop
- Click the image for 1920×1080 resolution
California Nebula, Ngc 1499. The California Nebula (NGC 1499) is an emission nebula located in the constellation Perseus. It is so named because it appears to resemble the outline of the US State of California on long exposure photographs. It is almost 2.5° long on the sky and, because of its very low surface brightness, it is extremely difficult to observe visually. It can be observed with a Hβ filter (isolates the Hβ line at 486 nm) in a rich-field telescope under dark skies. It lies at a distance of about 1,000 light years from Earth. Its fluorescence is due to excitation of the Hβ line in the nebula by the nearby prodigiously energetic O7 star (Wikipedia).