Hemisphere:  Southern  ·  Contains:  Helix nebula  ·  NGC 7293
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The Helix Nebula, NGC 7293, Caldwell 63, 



    
        

            Steven Bellavia
The Helix Nebula, NGC 7293, Caldwell 63
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The Helix Nebula, NGC 7293, Caldwell 63

Technical card

Imaging telescopes or lenses: Borg 90FL

Imaging cameras: ZWO ASI 183MM Pro

Mounts: Celestron AVX Mount

Guiding telescopes or lenses: Agena Astro 50mm f/3.9 Guidescope

Guiding cameras: ASI224MC

Focal reducers: Borg 0.72X Quadruplet Super Reducer, #7872

Software: IDEIKI AstroPhotography Tool (APT)  ·  Stark Labs Nebulosity 4.2  ·  Digital Photo Professional  ·  PHD2 Guiding  ·  SharpCap Pro 3.1

Filters: Astronomik 6nm OIII  ·  Optolong 7nm Ha 2"


Dates:Sept. 29, 2018

Frames:
Astronomik 6nm OIII: 21x300" (gain: 140.00) -15C bin 1x1
Optolong 7nm Ha 2": 24x300" (gain: 140.00) -15C bin 1x1

Integration: 3.8 hours

Darks: ~30

Flats: ~30

Flat darks: ~30

Avg. Moon age: 19.10 days

Avg. Moon phase: 80.23%

Bortle Dark-Sky Scale: 2.00

Temperature: 10.00


Basic astrometry details

Astrometry.net job: 2292699

RA center: 22h 29' 41"

DEC center: -20° 49' 40"

Pixel scale: 1.362 arcsec/pixel

Orientation: 359.151 degrees

Field radius: 0.737 degrees


Resolution: 3240x2160

Data source: Traveller

Description

The Helix Nebula, NGC 7293, Caldwell 63, is a large planetary nebula, formed by an intermediate to low-mass star, which sheds its outer layers near the end of its evolution. It is located in the constellation Aquarius and was discovered by Karl Ludwig Harding, around 1824. This object is one of the closest to the Earth of all the bright planetary nebulae, at approximately 700 light years from Earth, and spans 2.5 light years across. It is similar in appearance to the Cat's Eye Nebula and the Ring Nebula, whose size, age, and physical characteristics are similar to the Dumbbell Nebula, varying only in its relative proximity and the appearance from the equatorial viewing angle. The remnant central stellar core is destined to become a white dwarf star. The observed glow of the central star is so energetic that it causes the previously expelled gases to brightly fluoresce.

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Steven Bellavia
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            Steven Bellavia
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The Helix Nebula, NGC 7293, Caldwell 63, 



    
        

            Steven Bellavia