Hemisphere:  Northern  ·  Constellation: Perseus (Per)  ·  Contains:  NGC 1579
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NGC 1579 Northern Trifid Nebula in Perseus, 


            Mark Wetzel
NGC 1579 Northern Trifid Nebula in Perseus
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NGC 1579 Northern Trifid Nebula in Perseus

Technical card

Imaging telescopes or lenses: Celestron C9.25 Edge HD

Imaging cameras: ZWO ASI 1600MM-Pro Cool

Mounts: Celestron CGEMⅡ

Guiding telescopes or lenses: Celestron C9.25 Edge HD

Guiding cameras: ZWO 174MM Mini

Focal reducers: Celestron 0.7x Focal Reducer

Software: Celestron CPWI  ·  Main Sequence Software Seqence Generator Pro 3  ·  Pleiades Astrophoto PinInsight  ·  Adobe Photoshop CC 2021 Photoshop 2021  ·  PHD 2

Filters: ZWO 36mm Red  ·  ZWO 36mm Green Filter  ·  ZWO 36mm Blue Filter  ·  ZWO 36mm Luminance Filter

Accessory: Celestron OAG

Dates:Jan. 15, 2021Jan. 18, 2021Jan. 20, 2021Jan. 22, 2021

ZWO 36mm Blue Filter: 46x240" (gain: 139.00) -10C bin 1x1
ZWO 36mm Green Filter: 50x240" (gain: 139.00) -10C bin 1x1
ZWO 36mm Luminance Filter: 104x120" (gain: 139.00) -10C bin 1x1
ZWO 36mm Red: 38x240" (gain: 139.00) -10C bin 1x1

Integration: 12.4 hours

Darks: ~50

Flats: ~50

Flat darks: ~50

Avg. Moon age: 5.87 days

Avg. Moon phase: 36.38%

Bortle Dark-Sky Scale: 4.00

Basic astrometry details

Astrometry.net job: 4245977

RA center: 4h 30' 8"

DEC center: +35° 19' 44"

Pixel scale: 0.837 arcsec/pixel

Orientation: 21.365 degrees

Field radius: 0.349 degrees

Resolution: 2400x1800

Data source: Traveller


Arizona City, Arizona
January 15-30, 2021

NGC 1579 is a reflection nebula in the constellation Perseus. It was captured with broadband filters, Luminance, Red, Green and Blue. I tried to collect Hydrogen-alpha data, but 10 minute exposures provided a very faint and noisy stacked image. I set the camera rotation to 340 degrees equatorial for the primary object of the night, Thor’s Helmet, not the best composition for NGC 1579. I imaged The Northern Trifid Nebula while waiting for Sirius and Thor to rise high enough in the sky. Thus, I did not collect as many subframes as needed to bring out more detail and color in the blue reflection areas and the dark clouds. Furthermore, the seeing was so-so and there were several nights with high, thin clouds. I left the image train optical defects in the image; the large deflection spikes in the bright star near the upper left corner and the micro-reflections between the ASI 1600MM sensor and the protection window as shown in the bright star right of center.

The Northern Trifid Nebula is a bright reflection nebula in a large cloud of gas and dust. It is 2,100 light-years away from Earth and it is 3 light-years across. The reddish glow is not Ha emission from a gas cloud. The dust in NGC 1579 drastically diminishes, reddens, and scatters the light from an embedded, extremely young, massive star, itself a strong emitter of the characteristic red hydrogen alpha light (Nasa APOD).