The Rosette Nebula (NGC 2237-9) in H-alpha

Posted by CraigAndTammy
on Monday, February 15, 2010

by Craig and Tammy Temple 


The Rosette Nebula, NGC2237, is a large star-forming H II region in the constellation Monoceros. It is quite bright at a magnitude of 6.00. NGC2244 is the magnitude 4.80 open cluster of stars in the center of The Rosette.

Telescope: Orion 80ED at f/6
Accessories: William Optics 0.8x reducer/flattener vII; Dew control by DewBuster
Mount: Orion Atlas EQ-G controlled by EQMOD
Guiding: Orion StarShoot AutoGuider on William Optics ZS66
Camera: Canon Digital Rebel T1i, Hap Griffin Baader modified
Filter(s): Astronomik 6nm H-Alpha EOS Clip
Exposure: 29 x 600sec @ ISO 1600 (4hr. 50mins.)
Acquisition: ImagesPlus 3.80b Camera Control
Processing: ImagesPlus 3.80a – Calibrated, registered, Sigma-clipped averaged, DDP
Post-processing: Adobe Photoshop CS4; Noise Ninja; Noel Carboni's Tools
Date(s): January 31, 2010
Temperature(s): 31ºF (dropped to 25ºF)
Moon Phase: Waning Gibbous, 94% illuminated; 61º angular separation from target

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