| OBJECT |
NGC 6888 (Crescent Nebula) in HaRGB (images above are reduced-size | other sizes for top image: medium , original) Distance: 5,000 light years |
|
| Telescope | Takahashi TOA-130F @ f/7.7 | |
| Mount | Takahashi EM200 Temma II | |
| Camera | QSI 540wsg @ -10C | |
| Filters | Astrodon Ha (3nm), Astrodon Tru-Balance I-Series LRGB Gen 2 | |
| Guider | SX Lodestar | |
| Settings | 5x20min Ha (bin1x1); 2x5min ea RGB (bin2x2); AstroArt5, CS4 (slightly cropped, 10xdarks/flats/fdarks/bias) | |
| Date/Location | 28 September 2013 - Las Cruces, NM Note: Top image is Ha_HaRGB, where Ha:R (40:60) was used for the Red channel, and Ha for Luminance. Bottom image shows the Ha channel only, exposing dusty regions created by Hydrogen (read more about Ha at my blog). |
