Sh2-254 thru Sh2-258
Nebula Complex in Orion

RA: 06h 12m Dec: +17 59' Mag: 14.6, Size: -, Distance:2 kpc

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   This nebula complex of compact HII regions and active star formations is located in the club of Orion on the Orion/Gemini border. Starting from the top left is Sh2-258 a small nebula made of dust and gas exhibiting a yellow glow. To the right is Sh2-255 (IC 2162) which is the brightest nebula due to the very hot 11.3 mag type BO III star partially surrounded by dark filaments. Sh2-257 is to the right with a mag 10.8 BOV class star. To the lower right is the smaller Sh2-256 emission nebula and the largest nebula, Sh2-254, is a low density emission nebula with a darker red hue is ionized by a mag 9.8 O9.5V star. This nebula complex is embedded within the 27000 solar mass GEM OB1 molecular cloud located along the galactic plane with most of the mass concentration between bright nebulas Sh2-255 and Sh2-257.

Location & Date Backyard, Abbott Observatory - Jan. 31, Feb. 6-8,19 March 1, 2010
Temperature - Low 30's F
Telescope Deep Sky Instruments RC10C , F/7.3, Losmandy G11 Gemini, Prime Focus, Image scale 0.82 arcsec/pixel
Camera SBIG ST-2000XM w/CFW8, AO8
Baader LRGB AR Filters
CCD temp -15C
Exposure Times (Ha) 21x15 (L) 18x15 (R) 8x15 (G) 5x15 (B) 8x15 Minutes, Bin 1x1
Other Information Image planning - CCD Navigator
Image acquisition/focus/guiding/dither - CCD Autopilot4 w/CCDSoft/TheSky6/PinPoint
Image Processing * Images Plus 3.75- Calibration, Normalize, Grade, Alignment, Mean Combine, Deconvolution, Mild DDP
* Adobe CS4 - Ha+L+RGB combine, Levels, Curves, Sharpening, Cropping, NR, JPEG conversion

© 2010 Michael A. Siniscalchi