Contains: California nebula, NGC 1499, The star ξPer
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NGC 1499 California Nebula in BiColor Ha & SII

Technical card

Resolution: 4400x3520

Dates: Jan. 8, 2018Jan. 13, 2018

Astrodon Ha 5nm: 56x240" (gain: 139.00) -20C bin 1x1
Astrodon SII 3nm: 56x240" (gain: 139.00) -20C bin 1x1

Integration: 7.5 hours

Darks: ~50

Flats: ~50

Bias: ~250

Avg. Moon age: 24.02 days

Avg. Moon phase: 32.90%

Bortle Dark-Sky Scale: 6.00 job: 1890295

RA center: 60.143 degrees

DEC center: 36.504 degrees

Pixel scale: 2.078 arcsec/pixel

Orientation: 19.806 degrees

Field radius: 1.626 degrees

Locations: Backyard Red Zone Observatory, Taylor, MI, Michigan, United States


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, xi Persei.



Douglas J Struble



Having a hard time getting what looks good on my computer to match what looks good on Astrobin.

Sky plot

Sky plot


NGC 1499 California Nebula in BiColor Ha & SII, 


        Douglas J Struble