by Craig and Tammy Temple
The Rosette Nebula, NGC2237, Sh2-275, 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.
RGB Color Data:
Telescope: Orion 80ED f/7.5 refractor (at f/6)
Accessories: William Optics 0.8x FR/FF vII; Dew control by DewBuster
Mount: Orion Atlas EQ-G controlled by EQMOD
Guiding: Orion StarShoot AutoGuider on William Optics ZS66
Camera: Self-modified Canon Digital Rebel XT
Filters: 2” Hutech IDAS LPS
Exposure: 29 x 360sec @ ISO 800 (2hr. 54min.)
Acquisition: ImagesPlus 3.75 Camera Control
Processing: ImagesPlus 3.75 – Calibrated, registered, Sigma-clipped averaged, DDP
Post-processing: Adobe Photoshop CS4; Gradient XTerminator; Noise Ninja, Noel Carboni's Tools
Date(s): January 15, 2009 (reprocessed on February 6, 2009)
Temperature(s): 13ºF
Hydrogen-alpha Data:
Telescope: Orion 80ED f/7.5 refractor (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