Hemisphere:  Northern  ·  Constellation: Orion (Ori)
Lower's Nebula (Sh2-261) in Ha + RGB (Version 2), 



    
        

            Scott Davis
Lower's Nebula (Sh2-261) in Ha + RGB (Version 2)
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Lower's Nebula (Sh2-261) in Ha + RGB (Version 2)

Technical card

Imaging telescopes or lenses: Explore Scientific ED102 APO

Imaging cameras: Canon EOS Rebel T3i

Mounts: Celestron CGEM Hypertuned

Guiding telescopes or lenses: Orion ShortTube 80

Guiding cameras: Orion StarShoot Autoguider

Focal reducers: Astro-Tech AT2FF

Software: Sequence Generator Pro  ·  DeepSkyStacker  ·  Photoshop CS6

Filters: Astronomik 6nm Ha Clip-In Filter  ·  One-Shot Color

Accessory: Robofocus  ·  Home Made Peltier Cooler for T3i


Dates:Feb. 14, 2015Feb. 16, 2015Feb. 17, 2015Feb. 19, 2015Feb. 21, 2015Feb. 23, 2015

Frames:
Astronomik 6nm Ha Clip-In Filter: 68x600" (11h 20') ISO1600
One-Shot Color: 41x300" (3h 25') ISO1600

Integration: 14h 45'

Darks: ~22

Flats: ~40

Flat darks: ~40

Bias: ~40

Avg. Moon age: 14.58 days

Avg. Moon phase: 12.48%

Bortle Dark-Sky Scale: 6.33


Basic astrometry details

Astrometry.net job: 557075

RA center: 6h 9' 3"

DEC center: +15° 43' 19"

Pixel scale: 2.170 arcsec/pixel

Orientation: 179.949 degrees

Field radius: 0.782 degrees


Resolution: 620x512

Locations: My Backyard, Clovis, California, United States; Big Stump, Kings Canyon National Park, CA, United States

Description

Lower's Nebula, catalogued as Sh2-261 or LBN 863, is a large hydrogen emission nebula located in the constellation Orion. Its distance from Earth is estimated to be approximately 3,260 light years.

RGB data was captured from Big Stump in Kings Canyon National Park. Hydrogen data was captured from my backyard in Clovis, California.

This is Version 2, which is identical to Version 1 except that Version 1 uses 5-minute subs for the Ha frames instead of the 10-minute subs used in this version.

Version 1 Link: http://www.astrobin.com/156688/

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Lower's Nebula (Sh2-261) in Ha + RGB (Version 2), 



    
        

            Scott Davis