The Crescent Nebula
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NGC 6888 The Crescent Nebula |
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(Click on image for Full Resolution)
(Click the here for my 2001 version with my Vixen 102mm Flourite and ST-237a)
| Date: | August 29, 2003 |
| Exposure: | Ha (3nm) 10800 : 9 x 1200s |
| Processing: | Captured with CCDSoftV5, MaxIm for Image calibration,(16 flats dark subtracted and Sigma Reject combined, 30 bias frames Sigma Reject combined, 16-1200s darks Sigma Reject combined), dead/hot pixel removal, alignment, normalization. Photoshop for final processing and jpg conversion. |
| Conditions: | Average, Mag 3-4 Skies, high thin clouds, haze |
| Scope: | AP155EDF, f/7 (1.59 arcsec/pix measured with TheSky), Vixen 102mm Flourite @ f/9 for Guiding. All equipment on a Paramount ME and can be seen here. |
| Camera: | SBIG ST-8XE, -20°, SBIG ST-237A for Guiding |
| Comments: | Started this one after it crossed the meridian and imaged for 3 hours. This is still not enough to get the S/N up high enough for a smooth image. Will try to add some additional images weather permitting. |