M8 and M20
Lagoon and Trifid Nebulae
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| Other names: |
NGC 6523 (Lagoon), NGC 6514 (Trifid), NGC 6531 (M21), NGC 6544 (small globular cluster below and left of the Lagoon), IC 4678 (small reflection nebula left of the Lagoon) |
| 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: |
180 minutes [ 20 x 5 minutes + 40 x 2 minutes ] at ISO 1000 |
| Accessories: |
Autoguided with Orion StarShoot Autoguider and Stellarvue SV80S at f/6 |
| Location: |
Mt. Pinos, CA |
| Date |
July 18-19, 2009 |
| Notes: |
Processing: Image acquisition with Canon EOS Utility. Image calibration, align, and combine in ImagesPlus 3.75. Levels, curves, noise smoothing (Noel Carboni's PS Tools), selective sharpening, crop, and resize in Photoshop.
30 dark frames, 30 flat frames (T-shirt sky flats). Ambient temperature was between 53-58°F during the 2-evening imaging session.
Click the image for a larger version (1200 x 1800, ~2.0 MB).
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