Michael A. Stecker
mastecker@gmail.com

 


 
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NGC 2244 "Rosette Nebula"
The Rosette is an H II (hydrogen-alpha light) 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.
 file: NGC2244Sat-Ros240sX36P2AskarF5d5LeNhASI2600Duo192024GXaid7-1cGXDNd7-a1,jpg

Photographic Data
 telescope:
Askar 103 APO triplet refractor with 0.8X focal reducer
Aperture: 103 mm (4-inch)
Focal ratio: f/5.5
Focal Length: 560 mm
Full frame image
 
mount:
ZWO AM5 harmonic mount

 imaging camera:
ZWO ASI2600MC Duo color astro-camera
Full frame image

filter:
Optolong L-eNhanced nebular filter

exposure:
240 sec X 36 (144 minutes, 2.4 hours)
guiding:
SVBony 60 mm f/4 guide scopr (FL= 240 mm) with ZWO ASI662MC guide camera
 
processing software:
Asiair, Photoshop Elements 2021, GraXpert v.3 AI gradient & noise reduction software
 .
photographic site:
West Los Angeles California
(Bortle 9 light polluted sky)
 
 
 

Cropped image of Rosette Nebula
file: NGC2244Sat-Ros240sX36P2AskarF5d5LeNhASI2600Duo192024GXaid7-1cGXDNd7-a2cr.jpg