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Contains:  NGC 1491
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Sh2-206 • NGC 1491 • Fossil Footprint Nebula in SHO, 


            Douglas J Struble
Sh2-206 • NGC 1491 • Fossil Footprint Nebula in SHO

Sh2-206 • NGC 1491 • Fossil Footprint Nebula in SHO

Technical card

Resolution: 2980x3731

Dates:Oct. 18, 2019Oct. 19, 2019Nov. 5, 2019

Astrodon Ha 5nm: 445x120" (gain: 200.00) -20C bin 1x1
Astrodon OIII 3nm: 244x120" (gain: 200.00) -20C bin 1x1
Astrodon SII 3nm: 272x120" (gain: 200.00) -20C bin 1x1

Integration: 32.0 hours

Darks: ~50

Flats: ~50

Bias: ~250

Avg. Moon age: 15.84 days

Avg. Moon phase: 70.51%

Bortle Dark-Sky Scale: 7.00 job: 3251471

RA center: 4h 3' 36"

DEC center: +51° 16' 58"

Pixel scale: 0.648 arcsec/pixel

Orientation: 320.312 degrees

Field radius: 0.430

Locations: Backyard White Zone Observatory, Taylor, MI, Michigan, United States

Data source: Backyard


NGC 1491 (also designated Sharpless SH2-206) is a bright emission nebula and HII region, located on the edge of a vast cloud region of neutral gas, about 10,700 light-years away in the Perseus arm of our Milky Way galaxy. The stellar wind from the O5V 11.2 magnitude star (BD +50 886) at its centre is forming a blister in the gas clouds immediately surrounding it while also eroding the gas clouds.



Douglas J Struble
License: None (All rights reserved)

Sky plot

Sky plot


Sh2-206 • NGC 1491 • Fossil Footprint Nebula in SHO, 


            Douglas J Struble

In these public groups

Sharpless2 Objects