w/Narrow Band Normalization
| 0bject |
Sh2-261 (Lower's Nebula) emission nebula in Orion |
| Date |
Februar 25, 2023 |
| Exposure |
OSC 120 Minutes |
| Camera |
ASI294MC Pro w/Optolong L-Extreme filter |
| Telescope |
FSQ 106 f/5 on AP 900 GTO |
| Guiding |
ASI120mc with Orion 50 mm |
| Processing |
MaximDL, Photoshop CS6, Astronomy Tools, Topaz DeNoise AI |
| Comments |
Moderate seeing; acquired with MaximDL from Oro Valley AZ |
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 |
w/Narrow Band Normalization