NGC 1491

NGC 1491 is an emission nebula in the Perseus constellation, located ~ 10,000 ly away.  it is captured here in 3 narrowband emissions, Hydrogen Alpha, Ionized Sulfur, and Doubly-ionized Oxygen, or Hα, SII, and OIII.

More posts about the processing of this image will be coming shortly, stay tuned!

* Object : NGC1491
* Constellation : Perseus
* Distance : ~10,000 ly
* Type : Emission Nebula
* Acquired over 5 nights between 20SEP2016 and 28SEP201
* Scope: [Stellarvue SV80ST 80mm F/6 Apo Triplet](http://www.stellarvue.com/stellarvue-sv80st-80-mm-f-6-apo-triplet-refractor-sv080st-25sv/)
* Camera: [Atik 314L+ CCD](http://www.atik-cameras.com/product/atik-314l-plus/)
* Filter Wheel: [Starlight Xpress Mini Filter Wheel w/ Integrated OAG](http://www.sxccd.com/the-sx-mini-wheel-oag)
* Filters: [Astrodon 1.25" Tru-Balance 3nm Ha, SII and OIII](http://astrodon.com/store/p8/Astrodon_Narrowband_Filters.html)
* Guide Camera: [QHY5L-II](http://www.qhyccd.com/QHY5L-II.html)
* Mount: [Losmandy G11](http://www.losmandy.com/g-11.html)
* Software: PHD2, Sequence Generator Pro, Stellarium
* After frame rejection : 31 x 1200" Hα, 28 x 1200" OIII, 27 x 1200" SII : 28h40m total integration
* Flats x 50 / filter
* Master Dark @ 30 frames
* Master Bias @ 200 frames
* Processed in PixInsight
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