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Contains:  California nebula, NGC 1499, The star ξPer
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NGC 1499 California Nebula in the Hubble Palette, 


            Douglas J Struble
NGC 1499 California Nebula in the Hubble Palette

NGC 1499 California Nebula in the Hubble Palette

Technical card

Resolution: 4400x3520

Dates:Jan. 8, 2018Jan. 13, 2018Jan. 18, 2018

Astrodon Ha 5nm: 56x240" (gain: 139.00) -20C bin 1x1
Astrodon OIII 3nm: 74x240" (gain: 139.00) -20C bin 1x1
Astrodon SII 3nm: 56x240" (gain: 139.00) -20C bin 1x1

Integration: 12.4 hours

Darks: ~50

Flats: ~50

Bias: ~250

Avg. Moon age: 16.43 days

Avg. Moon phase: 22.53%

Bortle Dark-Sky Scale: 6.00 job: 1903422

RA center: 59.878 degrees

DEC center: 36.552 degrees

Pixel scale: 2.316 arcsec/pixel

Orientation: 199.898 degrees

Field radius: 1.812 degrees

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

Data source: Backyard


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
License: None (All rights reserved)

Sky plot

Sky plot


NGC 1499 California Nebula in the Hubble Palette, 


            Douglas J Struble