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)

Acquisition details

Dates:
Feb. 14, 2015 ·  Feb. 16, 2015 ·  Feb. 17, 2015 ·  Feb. 19, 2015 ·  Feb. 21, 2015 ·  Feb. 23, 2015
Frames:
Astronomik 6nm Ha Clip-In Filter: 68×600(11h 20′) ISO1600
One-Shot Color: 41×300(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: 06h09m03s.6

DEC center: +15°4319

Pixel scale: 2.170 arcsec/pixel

Orientation: 179.949 degrees

Field radius: 0.782 degrees

Resolution: 620x512

File size: 280.0 KB

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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Sky plot

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Histogram

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



    
        

            Scott Davis