Object |
|
| Description: | Trifid Nebula and M21 Open Cluster |
| Type: | Diffuse Nebula |
| Constellation: | Sagittarius |
| Distance: | 5,200 ly |
Image |
|
| Date: | August 31, 2008 |
| Location: | Palomar Mountain, CA |
| Exposure: | R 6x10, G 6x10, B 6x10 (bin 1x1) |
Equipment |
|
| Optics: | Takahashi FSQ-106N Refractor |
| Focal Length: | 530mm @f/5 |
| Mount: | Astro-Physics 900GTO |
| Camera: | SBIG ST-2000XM |
| Focuser: | Robo-Focus |
| Filters: | CFW10A, Astrodon RGB |
| Software: | CCD Commander, Maxim DL, CCDStack, Photoshop |