Last updated on 10/26/2014

Sh2-261 Lower's Nebula

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


Click on image for full resolution version

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

Click on image for full resolution version

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