Hemisphere:  Northern  ·  Constellation: Orion (Ori)
Lower's Nebula (Sh2-261) in Ha + RGB (Version 1), 



    
        

            Scott Davis
Lower's Nebula (Sh2-261) in Ha + RGB (Version 1)
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Lower's Nebula (Sh2-261) in Ha + RGB (Version 1)

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


Dates:Feb. 9, 2015Feb. 12, 2015Feb. 14, 2015

Frames:
Astronomik 6nm Ha Clip-In Filter: 116x300" (9h 40') ISO1600
One-Shot Color: 41x300" (3h 25') ISO1600

Integration: 13h 5'

Darks: ~17

Flats: ~40

Flat darks: ~40

Bias: ~40

Avg. Moon age: 22.23 days

Avg. Moon phase: 49.12%

Bortle Dark-Sky Scale: 5.67


Basic astrometry details

Astrometry.net job: 544698

RA center: 6h 9' 4"

DEC center: +15° 42' 25"

Pixel scale: 1.792 arcsec/pixel

Orientation: 179.960 degrees

Field radius: 0.750 degrees


Resolution: 620x470

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

Version 2 Link: http://www.astrobin.com/159822/

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Histogram

Lower's Nebula (Sh2-261) in Ha + RGB (Version 1), 



    
        

            Scott Davis