clic here for 40% size 1592 x 1062 (870 kB)
About this Image
This quite unknown area in a dense star field is situated south of the open cluster NGC6231 in the tail of Scorpius..
The nebula is quite faint and often have been overlooked because of it, even by southern observers.
105mm TMB refractor with flattener at f/6.5
|Camera||SBIG STL-11000M at -25C, internal filter wheel|
|Filters||Astronomik H-alpha (15 nm) + RGB|
|Date||Aug 15, 2004.|
|Sky Conditions||mag 6.5, high transparency, temperature 10 C,|
Ha = 100 minutes (10-minute sub-exposures),
RGB= 15:15:15 min (5-minute sub-exposures)
Image aquisition in Maxim DL 4.0; Image calibration, aligning, mean stacking, DDP and color synthesis in ImagesPlus;
Photoshop: H-alpha blended to red and L channel; Noise reduction by Neatimage;