Ha data| 0bject | Sh2-261 Emission (Lower's) nebula in Orion |
| Date | January 17-19, 2013 |
| Exposure | HαRGB 540:30:30:30 (Hα+R 50/50, Hα+B 5/95, HDR combined version) |
| Camera | STL11000M with AstroDon Gen II filters |
| Telescope | ASA 10N f/3.7 on AP900GTO CP3 |
| Guiding | Remote guide head with MiniBorg 50 mm |
| Processing | MaximDL, Photoshop CS5, GradientXterminator, AstroActions |
| Comments | Good seeing but with a first quarter moon; acquired with CCD Commander |
|
Object |
Sh2-261 Emission Nebula in Orion (Lower's Nebula) |
| Date | 1/17 and 1/19/2005 |
| Exposure | HaRGB 315:20:20:20 (RGB binned 2x2) |
| Camera | SXV-H9 w/ Schuler filters |
| Telescope | Takahashi FC-76 @ f/5.9 on Losmandy G11 |
| Guiding | ST-4 guided |
| Processing | MaximDL, AIP4Win, Photoshop CS |
| Comments | Clear and cold, gibbous moon high in sky |
|
Object |
Sh2-261 Emission Nebula in Orion (Lower's Nebula) |
| Date | 1/17 and 1/19/2005 |
| Exposure | Ha (5 hours and 15 minutes; 900 sec subexposures) |
| Camera | SXV-H9 w/ Schuler filters |
| Telescope | Takahashi FC-76 @ f/5.9 on Losmandy G11 |
| Guiding | ST-4 guided |
| Processing | MaximDL, AIP4Win, Photoshop CS |
| Comments | Clear and cold, gibbous moon high in sky |