NGC457 in Cassiopia
Rich Splashy open cluster
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
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GLOBULARS OPEN CLUST PLANETARIES LINKS
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
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.