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GEMINI - OPEN CLUSTER - MAGNITUDE 5.1 |
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M35 - OPEN
CLUSTER in GEMINI
with Open Cluster NGC 2158
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About this Object: |
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At the foot of the twins in Gemini is a large open cluster known as M35. The cluster shines at mag 5.1 and consists prominently of young, hot blue stars. There is some reflection nebulosity to this cluster, but it's very difficult to capture. This photography merely hints at it. The larger, looser grouping of stars in the upper left hand corner is M35. Paired with M35 in this photo is the tight open cluster NGC 2158. This cluster of older stars shines at a magnitude of 8.6. M35
is easily seen with binocular in just about any sky.
It's companion is a little more difficult to see,
though even small scopes can bring it in if the sky
is dark enough. |
Location:
Eldorado
Star Party, 2005, near Eldorado, Texas
Seeing:
2/10
Transparency: 8/10
Temperature: 50 degrees
F (-20c on camera)
Date: November 4, 2005
Scope/Mount: 12.5"
RCOS RC with Paramount ME
Camera: SBIG STL-11000M astro
CCD camera
Exposure Info: LRGB
image; 100:40:30:40 RGB (20 minute subexposures L, 10 minute subs
RGB, color binned)
Processing Information:
Acquisition
in CCDSoft. Calibration,
Registration, DDP, and RGB channel combine in MaxIm DL 4. LRGB
combine, color balance, levels/curves, sharpening, and
noise removal (Noel Carboni's Astronomy Tools) in Photoshop CS.
Exposure Notes: Exceptionally poor seeing and wind during the blue channel exposure.
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