NGC7380 / Sh2-142 - Cluster
and Nebula in Cepheus
NGC7380 - Nebula in Cepheus
STL11000 w Astronomik filters
AP155 EDF F/7 w Robofocus
7
x 5 min Luminance, 5 x 5 min RGB, 5 x 30 min H-Alpha
Acquired, Flats and Darks subtracted in
CCDSoft5
Alignment and Sigma Reject combine in Maxim
Colours assembled in Phototshop CS4 and H-Alpha layered into the RGB as
100/7/20 percent using Lighten. H-Alpha layered into the Luminance at
50% using Lighten
Levels, curves in CS4
Click on the image to see a higher resolution version
Click HERE to see the H-Alpha
channel
Click HERE to see the same image
taken
3 years ago with my ST10XME and FSQ - same field of view at half the
resolution.
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From SEDS.ORG:
Discovered by Caroline Herschel in 1787.
Caroline Herschel discovered this cluster on August 7, 1787, on the
occasion of being free from recording duties when her brother William
was absent. As usual, Caroline included it in her small private list
under No. 19. William Herschel included his sister's discovery in his
catalog, and labelled it H VIII.77.
Open cluster NGC 7380 is nicely intertwined with a bright diffuse
nebula which bears the catalog designation Sh2-142.
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Flesherton, Ontario
Aug 1st 2009
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