Markarian's Chain
A Portion of the Virgo-Coma Cluster
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| Other names: |
M84, M86, M88, The Eyes (NGC 4438 and NGC 4435, at center), M87 (Virgo A, toward bottom left), Virgo Galaxy Cluster, Virgo-Coma Galaxy Cluster, and many NGC numbers |
| Optics: |
Takahashi FSQ-106ED at f/3.65 — photo of setup |
| Mount: |
Mountain Instruments MI-250 w/Gemini on ATS portable pier |
| Camera: |
Canon EOS 40DG [ UV/IR filter modification by Hap Griffin ] |
| Exposure: |
108 minutes [ 18 x 6 minutes ] at ISO 800 |
| Accessories: |
Autoguided with Orion StarShoot Autoguider and Stellarvue SV80S at f/6 |
| Location: |
Landers, CA [ GMARS ] |
| Date |
March 28, 2009 |
| Notes: |
Processing: Image acquisition with Canon EOS Utility. Image calibration, align, and combine in ImagesPlus 3.0. Levels, curves, noise smoothing (Noel Carboni's PS Tools), selective sharpening, crop, and resize in Photoshop.
12 dark frames, 30 flat frames (T-shirt sky flats). Ambient temperature was 41°F during the imaging session.
Click the image for a larger version (1800 x 1200, ~1.2 MB).
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