Hemisphere:  Southern  ·  Constellation: Aquarius (Aqr)  ·  Contains:  Helix nebula  ·  NGC 7293  ·  NGC7293
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Helix Nebula HOO Palette (Cropped), 


            Diego Cartes
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Helix Nebula HOO Palette (Cropped)

Imaging telescopes or lenses: Televue TV-76

Imaging cameras: ZWO ASI 1600MM Cooled Pro

Mounts: Celestron Advanced VX

Guiding telescopes or lenses: ZWO 60mm Guidescope

Guiding cameras: ZWO ASI 290mm Mini

Focal reducers: Televue 0.8x focal reducer / field flattener

Software: PixInsight 1.8 Pisinsight 1.8

Filters: ZWO H-alpha 36mm

Accessory: ZWO 7x 36mm Filter Wheel (EFW)  ·  Intel NUC  ·  Arduino ASCOM Focuser Pro2  ·  QHYCCD Polemaster

Dates:Oct. 6, 2010Sept. 21, 2019Oct. 5, 2019Oct. 28, 2019Oct. 31, 2019Nov. 1, 2019Nov. 2, 2019

ZWO OIII -7nm 36mm: 53x900" bin 1x1
ZWO H-alpha 36mm: 44x900" bin 1x1

Integration: 24.2 hours

Darks: ~50

Flats: ~25

Flat darks: ~50

Bias: ~50

Avg. Moon age: 10.14 days

Avg. Moon phase: 24.96%

Bortle Dark-Sky Scale: 5.00

Astrometry.net job: 3257223

RA center: 22h 29' 50"

DEC center: -20° 48' 12"

Pixel scale: 1.030 arcsec/pixel

Orientation: 82.418 degrees

Field radius: 1.029 degrees

Resolution: 5688x4401

Locations: Backyard, Colina, Region Metropolitana, Chile

Data source: Backyard


The Helix Nebula is an example of a planetary nebula, formed by an intermediate to low-mass star, which sheds its outer layers near the end of its evolution. Gases from the star in the surrounding space appear, from our vantage point, as if we are looking down a helix structure. The remnant central stellar core, known as the central star (CS) of the planetary nebula, is destined to become a white dwarf star.[Wikipedia]

This narrowband image shows various nebular rings, some of them very far away from its center, and also some cometary knots can be inferred at the "iris" part of the nebula.

The difference of brightness between the center of the nebula and its surroundings made this image a little difficult to process, but i am happy with the detail i could capture, considering the focal length of my telescope.

Here is a very helpful image of the structure of the Helix Nebula, taken from this article on Astronomy Magazine.



  • Helix Nebula HOO Palette (Cropped), 


            Diego Cartes
  • Helix Nebula HOO Palette (Cropped), 


            Diego Cartes
  • Helix Nebula HOO Palette (Cropped), 


            Diego Cartes
  • Final
    Helix Nebula HOO Palette (Cropped), 


            Diego Cartes

Sky plot

Sky plot


Helix Nebula HOO Palette (Cropped), 


            Diego Cartes