Hemisphere:  Southern  ·  Constellation: Aquarius (Aqr)  ·  Contains:  Helix nebula  ·  NGC 7293  ·  NGC7293  ·  PK036-57.1
Getting plate-solving status, please wait...
Helix Nebula in HA, 


            Diego Cartes
Powered byPixInsight

Helix Nebula in HA

Imaging telescopes or lenses: Televue TV-76

Imaging cameras: ZWO ASI 1600MM Cooled Pro

Mounts: Celestron Advanced VX

Guiding telescopes or lenses: Celestron 50mm Guide Scope

Guiding cameras: Meade DSI Pro I Monochrome

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:Sept. 22, 2019Oct. 5, 2019Oct. 6, 2019

Frames:ZWO H-alpha 36mm: 45x900"

Integration: 11.2 hours

Darks: ~42

Flats: ~25

Bias: ~50

Avg. Moon age: 12.62 days

Avg. Moon phase: 50.53%

Bortle Dark-Sky Scale: 5.00

Astrometry.net job: 3040017

RA center: 22h 29' 35"

DEC center: -20° 50' 22"

Pixel scale: 1.031 arcsec/pixel

Orientation: 82.446 degrees

Field radius: 0.710 degrees

Resolution: 3899x3066

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]

Altought my setup is primarily focused on widefield imaging, i wanted to know how much detail i could get. 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.

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



  • Helix Nebula in HA, 


            Diego Cartes
  • Helix Nebula in HA, 


            Diego Cartes
  • Helix Nebula in HA, 


            Diego Cartes
  • Helix Nebula in HA, 


            Diego Cartes
  • Final
    Helix Nebula in HA, 


            Diego Cartes

Sky plot

Sky plot


Helix Nebula in HA, 


            Diego Cartes