ASTRO: Sh2-261

Sh2-261 is am impressive emission nebula in northern Orion, not far from the
often imaged NGC 2174/2175. It is much fainter than it's famous
brother/sister, but still has a good surface brighness, so it is amazing
that I have not imaged it before.
I imaged it in three nights but ended up using only one night's data as
conditions had been bad in two of the three nights. There was only a diffuse
weak brightening in the middle of the nebula in OIII and SII was the same as
Ha, only weaker. I ended up doing a Ha:SII:SII.

Taken from Berlin with a Celestron RASA at f/2.2, G11 mount, Trius SX694
camera, 57x3min Ha and 34x3min SII.

Stefan