26.12.16, Lembeck, Tak FSQ85, Reducer Q on Avalon m-Zero

33x60sec Ha and 12x60sec OIII. No Darks/Flats etc.



Just after Christimas i gave the ASI 1600 MMC its first light. The camera has a CMOS sensor instead of the traditional CCD. Its one of the first serious cooled CMOS cameras out there and i was very curious how it performs. With its very low read noise, i should be able to run very short exposures (seconds!). Obviously, you still need to get a decent amount of lights to get to a reasonable total exposure time.

Ulrich and i went to place near Lembeck. Still a bright place and the milky-way could not be seen. 

Unfortunately, the distance Reducer->CCD was not right at all as i forgot to add a T2 extension. Luckily i had one of a similiar size. It worked but not perfectly.

It was quite cold, approx 0 degrees and we did not make it that long as Ulrich had to work next day so we went home at 1am already.

This image of the Rosette Nebula was made up of 33x60sec Ha and 12x60sec OIII. Impressive for narrow-band imaging with 60sec subs! There is still s good amount of noise in the picture so i might reprocess the image using darks.


The Rosette Nebula (also known as Caldwell 49) is a large, spherical (circular in appearance), H II region located near one end of a giant molecular cloud in the Monoceros region of the Milky Way Galaxy. The open cluster NGC 2244 is closely associated with the nebulosity, the stars of the cluster having been formed from the nebula's matter.

The cluster and nebula lie at a distance of some 5,000 light-years from Earth and measure roughly 50 light years in diameter. The radiation from the young stars excites the atoms in the nebula, causing them to emit radiation themselves producing the emission nebula we see. The mass of the nebula is estimated to be around 10,000 solar masses.