A Bat near NGC 6231

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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.
A wider view on this area can be seen here.
The distance to these nebulae is approx. 5000 light years. North is up.

Below you find a pure H-alpha image.

clic for 40% size 1590 x 1058 (600 kB)

Technical Details


105mm TMB refractor with flattener at f/6.5

Mount AP-400 GEM
Camera SBIG STL-11000M at -25C, internal filter wheel
Filters Astronomik H-alpha (15 nm) + RGB
Date Aug 15, 2004.
Location Hakos/Namibia
Sky Conditions mag 6.5, high transparency, temperature 10 C,
Exposure Ha = 100 minutes (10-minute sub-exposures),
RGB= 15:15:15 min (5-minute sub-exposures)
Processing 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;