Clusters in Gemini
Instrument: Stellarvue SV80S Refractor
w/.8x TR2008 Field Flattener, EFR = 80mm f/4.74 @ 379mm FL
Platform: Astrophysics AP1200
Camera: Canon 10D @ ISO800
Filters: Standard IR Block
Location: Payson, Arizona
Elevation: 5150 ft.
Sky: Seeing 7/10, Transparency 8/10
Outside Temperature: 35F
Processing Tools: Photoshop CS, PixInsight, Raw Shooter Premium
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Embedded in the
rich Winter Milky Way, this grouping of open star clusters offers
many colorful stars, and a wide range in cluster richness. Dominating
this field is M35 in the center, a 5.1 magnitude rich open cluster,
spanning the width of the full moon. Just below it and to the
left is another even richer star cluster, NGC2158. Much smaller
because it is a background object, this 8.6 magnitude splendor
spans 5 arcminutes and is dominated by yellow supergiants. Notice
also a very peculiar aspect of this cluster - the lower half
seems to have many more orange stars than the top half.
Near the bottom edge
in the center are two smaller sparse clusters, IC2156 and 57.
Only a two very faint galaxies appear in this part of the sky,
too dim to record in this image.
Raw conversion in RS
premium at 3100 degrees color temperature. Standard brightness,
hue and contrast adjustments in Photoshop CS2. Absolutely NO
sharpening of any kind was employed on this image. Finally, a
special technique was employed to spectrally correct the lack
of red response in this 10D image to bring it to a much more
representative color response.