Rosette Nebula (Caldwell 49)

In the freezing cold I imaged the C49 Rosette Nebula with my usual equipment:  Canon 1100D mod, 23x135sec, ISO 1600, Canon 200mm f/2.8 @ f/3.5, HEQ5, from Dângău Mare. I can say the session was a success. I used my star handling program to reduce the stars’ dominance over the nebulae.

The curious thing in the frame is the crown shaped denser star field at 6h39′, N2°3′ in the upper left corner. It lies near the open cluster NGC 2262, at 11.3m which is just outside of this frame. I included some Google Sky and SIMBAD images for comparison, and also did an astrometry.net plate solving. With some help from a fellow amateur astronomer, known as nr74 (Németh Róbert), I identified it as Collinder 110, at 10.5m. Noteworthy that the cluster is not listed in other obvious places. See [simbad]

In this frame, open cluster NGC2236, at 8.5m is on old friend, known from the previous attempt to image the Rosette Nebula. It is about 9600 light years away, ie about twenty times further than the Pleiades.

 raw sample
raw sample
 stack with curves
stack with curves
 handling the colors
handling the colors
 progressing
progressing
 the stage where I applied my starheal
the stage where I applied my starheal
 output z3 – no panda eyes, no large stars
output z3 – no panda eyes, no large stars
 the stars extracted
the stars extracted
 with some blur
with some blur
 no panda eyes
no panda eyes
 premerger 1
premerger 1
 premerger 2
premerger 2
 output z7 – the automatic output of my starheal – more saturated than I liked it
output z7 – the automatic output of my starheal – more saturated than I liked it
 towards the final image: full star reduction
towards the final image: full star reduction
 towards the final image: no star reduction
towards the final image: no star reduction
 The Rosette Nebula (Caldwell 49) – with .69 star reduction
The Rosette Nebula (Caldwell 49) – with .69 star reduction
 platesolved by astrometry.net
platesolved by astrometry.net
 simbad skymap overlayed
simbad skymap overlayed
 NGC 2262 marked, the denser starfield – upper left corner on my image – circled
NGC 2262 marked, the denser starfield – upper left corner on my image – circled
 nothing there in simbad
nothing there in simbad
 nothing there in simbad
nothing there in simbad
 couldn’t resist a large field of view with Orion :)
couldn’t resist a large field of view with Orion :)

 
top: No star reduction
bottom: Full star reduction
 
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