The Dumbell Nebula
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M27 The Dumbell Nebula |
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(Move your mouse over the image to see my 07/16/2000 image)
| Date: | July 21, 2001 |
| Exposure: | RGB : 6 x 300s R, 6 x 300s G, 6 x 480s B |
| Processing: | MaxIm for image acquisition, AIP4WIN for Dark, Flat, and Bias calibration, Photoshop for final balance and JPG web conversion. |
| Conditions: | Good, the sky settled down after 11:00 and gave up acceptable conditions for this shot. |
| Scope: | C14 @ f/7 |
| Camera: | SBIG ST-9E, -25°, Celestron 6.3 Focal Reducer, Hutech LPS Filter |
| Comments: | My third try at this one. More is better. The "wings" are now visible! Using the information from the Handbook of Astonomical Image Processing (AIP4WIN) - Use darks 4-5 times the duration of the image. I took 15 darks at 1200 sec and median combined. I was able to get a smoother background. Plus, I am learning more about DDP, streching, and Histogram manipulation |