is often referred to as the "Trifid of the North" in that
it strongly resembles the famed nebula in Sagittarius. Like the Trifid,
it has prominent dust lanes at its center. It was also compared to
the Trifid in that it was believed to consist of both emission and
reflection regions. However, more recent spectral analysis of NGC
1579 has revealed that the red hue was not due to hydrogen being excited
by the ultraviolet light of a hot young star. Rather, the color can
be attributed to a high luminosity red star, LkAlpha101, its light
being diffused by the surrounding nebula. At least 35 fainter Ha emitters
are also located within the nebula.
NGC 1579 lies approximately 21,000 light years away. It has a diameter
of 3 light years.
Celestron C11 Edge HD
||Luminance: SBIG ST-8300
Color: Modified Canon 650D (Raw
capture; ISO 1600)
guiding with Lodestar on ONAG
24 @ 5 min. through clear filter and 18 @ 5 min. through Ha filter
(both binned 2x2)
Color: 18 @ 5 min.
and Ha images were focused, calibrated, aligned, and combined in CCDSoft.
Color images were calibrated, aligned, and combined in ImagesPlus.
A master Luminance image was produced by combining the L and Ha images.
The Luminance and color images were aligned in RegiStar and the composite
image was adjusted in Photoshop. Sharpening and noise reduction were
done using Topaz Detail and DeNoise respecitively.
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