The Double Cluster NGC869/884 Open Clusters in Perseus

Uploaded 3/13/10

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 One of the most magnificent Deep Sky object in the sky, this unique pairing of rich open clusters is breathtaking both visually and photographically. It also makes a great test target to demonstrate optical quality in a new Astrograph! Tens of thousands of stars distributed all over the frame reveal the superb sharpness of the new optics, and demonstrate a range of colors in the stars better than any shot I have ever taken of this subject. Look carefully at the plethora of oranges, reds, yellows and blues in this image, an exciting field to image indeed.

Object Details:

South is up in this image, with the left most cluster being NGC869, and the right NGC884. On the left, NGC869 also known as Cr24 is 5.3rd magnitude, and spans some 30 arcminutes in size - the same span as the full moon! 200 stars are listed in Megastar. On the right, NGC884 is a nearly identical 6.1 magnitude, and spans also 30 arc minutes. 150 stars are listed in Megastar. It is also known as Cr25.

Optics: 8" f/4 Newtonian Astrograph w/Baader MPCC Coma Corrector Platform: Astrophysics AP1200 Camera: Hutech Modified Canon XTi @ ISO800 Exposure: 6 x 5m = 30 mins Location: Payson, Arizona Elevation: 5150 ft. Sky: Seeing 6/10, Transparency 8/10 Outside Temperature: 35F Processing Tools: Photoshop CS2, Images Plus 3.82 HOME GALAXIES EMISSION NEBS REFLECTION NEBS COMETS GLOBULARS OPEN CLUST PLANETARIES LINKS