Contains: NGC 1893, IC 410
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IC 410 - Tadpole Nebula in the Hubble Palette

Technical card

Resolution: 4285x3428

Dates: Dec. 1, 2017Dec. 8, 2017Dec. 26, 2017

Frames:
Astrodon Ha 5nm: 76x240" (gain: 139.00) -20C bin 1x1
Astrodon OIII 3nm: 77x240" (gain: 139.00) -20C bin 1x1
Astrodon SII 3nm: 56x240" (gain: 139.00) -20C bin 1x1

Integration: 13.9 hours

Darks: ~50

Flats: ~50

Bias: ~250

Avg. Moon age: 13.35 days

Avg. Moon phase: 71.44%

Bortle Dark-Sky Scale: 6.00

Astrometry.net job: 1883686

RA center: 80.620 degrees

DEC center: 33.387 degrees

Pixel scale: 0.648 arcsec/pixel

Orientation: 273.513 degrees

Field radius: 0.494 degrees

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

Description

I ended up reprocessing this. Even though I use 3nm SII and OIII filters, I think I had some gradient issues from the moon.

IC 410 is an emission nebula in Auriga 12,000 light-years away. The nearby cluster of hot blue type O and B stars, NGC 1893 illuminates the nebula and also emits fierce stellar winds that have sculpted it. What were once two thick, majestic pillars of cold gas, like the Pillars of Creation in the Eagle Nebula, have been so heavily eroded by the stellar winds that they now resemble tadpoles. The leading globules of the pillars still remain and represent the tadpoles heads. Intense radiation from the stars evaporates cold gas from the surface of the globules, ionizes it, and the stellar winds blow it back against the globules, forming brightly compressed rims. However, the stellar winds have so heavily eroded the pillars to the point where they now resemble wiggling tadpole tails, like celestial windsocks flapping in the stellar breeze.

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Author

Douglas J Struble
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IC 410 - Tadpole Nebula in the Hubble Palette, 




    

        Douglas J Struble