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M81
Image Information
| Quoted from SEDS: William Herschel discovered the cluster
in 1784, the nebula in 1785.
The Chrismas Tree Cluster and the Cone Nebula were both discovered by
William
Herschel. He found the cluster on January 18, 1784 and cataloged it
as H VIII.5, and the nebula on December 26, 1785, and assigned it the
number H V.27. The nebula belongs to a much larger complex, which is
currently an active star forming region.
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800
1600
Full
| This image is compiled from 10 - 15 minute R, G,
& B images and 10 -15 minute luminance. A total of 10 hours of data was used. All data was
acquired using MaxImDl/CCD version 5 using ACP. Images
were reduced, De-Bloomed, Auto Star Aligned, average combined and saved in
MaxImDl version 5.
The master images were combined, registered and the color image created.
Photoshop CS 3 was used
for cleanup of blooms, curves, and levels. The image data was collected over
January 24 - 31, 2009. This is one of the first "Baader LRGB filter
images I've completed. |
Equipment and Location Information
| Date |
January 24 -
31, 2009
|
| Location |
Dogwood Ridge Observatory |
| Optics |
OGS 12.5" RC |
| Mount |
Astro Physics AP1200GTO |
| Camera |
SBIG ST10XME |
| Filters |
Baader LRGB
1.25" mounted |
| Conditions |
Temperature middle teens - low
twenties with very
moderate seeing. Transparency good to moderate. |
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