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Abell 39, 


            Steven Bellavia
Abell 39
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Abell 39

Technical card

Imaging telescopes or lenses: Borg 90FL

Imaging cameras: ZWO ASI533MC Pro

Mounts: Sky-Watcher EQ-6R Pro SynScan

Guiding cameras: ASI224MC

Software: Pleiades Astrophoto PixInsight  ·  Stark Labs Nebulosity 4.2  ·  Annie's Astro Actions V7  ·  Noel Carboni's Astro Tools for PhotoShop Noel Carboni Actions  ·  Digital Photo Professional  ·  IDEIKI AstroPhotography Tool (APT)  ·  SharpCap Pro 3.2  ·  PHD2 Guiding

Filters: Astronomik L2 UV/IR Cut  ·  ZWO Duo-Band Filter

Accessory: Borg 1.08X DG Multi-Flattener, #7108

Dates:May 20, 2020May 21, 2020

ZWO Duo-Band Filter: 60x300" (gain: 100.00) -5C bin 1x1
Astronomik L2 UV/IR Cut: 60x60" (gain: 100.00) -5C bin 1x1

Integration: 6.0 hours

Darks: ~30

Flats: ~30

Flat darks: ~30

Avg. Moon age: 27.92 days

Avg. Moon phase: 3.13%

Bortle Dark-Sky Scale: 4.00

Mean SQM: 21.20

Mean FWHM: 3.85

Temperature: 5.00

Basic astrometry details job: 3541353

RA center: 16h 27' 34"

DEC center: +27° 54' 39"

Pixel scale: 1.412 arcsec/pixel

Orientation: 187.945 degrees

Field radius: 0.502 degrees

Resolution: 2048x1536

Data source: Traveller


Abell 39 is a low surface brightness planetary nebula in the constellation of Hercules. It is the 39th entry in George Abell's 1966 Abell Catalog of Planetary Nebulae. It is estimated to be about 6,800 light-years from earth. It is almost perfectly spherical and also one of the largest known spheres with a radius of about 2.5 light-years.



Steven Bellavia
License: None (All rights reserved)

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Abell 39, 


            Steven Bellavia