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.


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.

Flesherton, Ontario
Aug 1st 2009