Sh2-129 is a relatively faint emission nebula in the constellation Cepheus. This region is characterized by H-alpha-emission. In 2011, Nicolas Outters discovered the squid nebula with its official name Ou4.
This region is characterized by a extremely faint OIII emission.

The editing of this Image was a real challenge, this is try number 52...

Technical details:
H-alpha 37500": 10 h 24 min
3 x 1800"
20 x 1200"
9 x 900"

O[III] 151800": 42h (40 hours taken for the picture, 2 hours rejected)
2 x 1800"
11 x 1200"
95 x 900"
517x180"

Daten zum Bild