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CAMERA: |
Canon 40D
baader modified |
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
H-Beta filter (isolates the H-Beta 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.
The
California Nebula was discovered by E. E. Barnard in 1884.
The
text above is taken from
Wikipedia.
Since this object is dominated by H alpha I used the red
channel as the luminance when doing the LRGB combine after
CCDStack calibration. The image was processed in January
2011, more than two years after it was taken.
An
enlarged (50%) version can be viewed
here. |
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