NGC457 in Cassiopia Rich Splashy open cluster

Uploaded 9/20/10

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 There are few open clusters which have distinct nick names, and this is one of the finest. Known also as the "Owl Cluster" because of the two bright stars appear as eyes, and the rest of the cluster seems to resemble a bird with outstretched wings. Photographically, this image is a blast. The two brilliant super giant suns that dominate this object form a spectacular color contrast with the surrounding field. the brightest ruddy star is 5th magnitude and spectral type FOla, a very rare type with a B-V of .6 or so. The owls other eye is 7th magnitude and type B6 spectral class. Many fine K and M class stars can also be seen as orange objects in this field as well. The Owl cluster is 6.4th magnitude total and 13 arcminutes in size, with 80 known cluster members.

Careful examination of this image, taken with a 80% full moon in the sky one can compare the other objects in this field with the charts in Megastar. Four galaxies are found in this field, ranging in brightness from 15.5 magnitude to 17.5. All can be seen in the largest image buried amongst a very rich stellar background.

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 total Location: Payson, Arizona Elevation: 5150 ft. Sky: Seeing 5/10, Transparency 9/10 Outside Temperature: 60F Processing Tools: Photoshop CS2, Images Plus 3.82 HOME GALAXIES EMISSION NEBS REFLECTION NEBS COMETS GLOBULARS OPEN CLUST PLANETARIES LINKS