Hemisphere:  Northern  ·  Constellation: Delphinus (Del)

Image of the day 09/06/2020

Getting plate-solving status, please wait...
Abell 72 (PK 59 -18.1) Planetary Nebula in Delphinus, 


            Douglas J Struble
Abell 72 (PK 59 -18.1) Planetary Nebula in Delphinus
Powered byPixInsight

Abell 72 (PK 59 -18.1) Planetary Nebula in Delphinus

Technical card

Imaging telescopes or lenses: Explore Scientific ED165CF FPL-53

Imaging cameras: ZWO ASI1600MM-PRO

Mounts: Astro-Physics Mach 1 GTO

Guiding telescopes or lenses: Orion 80mm Short Tube

Guiding cameras: Starlight Xpress Lodestar x2

Software: Adobe Photoshop CS5.5  ·  PHD2  ·  Sequence Generator Pro  ·  PixInsight  ·  SkySafari Pro

Filters: Astronomik Deep-Sky B  ·  Astronomik Deep-Sky G  ·  Astronomik Deep-Sky R  ·  Astrodon OIII 3nm

Accessory: ZWO 8x 1.25" Filter Wheel (EFW)  ·  QHYCCD PoleMaster  ·  Hotech 2" SCA Self-Centering Field Flattener  ·  MoonLite CFL 2.5" Large Format Focuser

Dates:Aug. 17, 2020Aug. 22, 2020Aug. 23, 2020

Astrodon OIII 3nm: 506x120" (gain: 200.00) -20C bin 1x1
Astronomik Deep-Sky B: 31x60" (gain: 0.00) -20C bin 1x1
Astronomik Deep-Sky G: 30x60" (gain: 0.00) -20C bin 1x1
Astronomik Deep-Sky R: 43x60" (gain: 0.00) -20C

Integration: 18.6 hours

Darks: ~50

Flats: ~50

Bias: ~250

Avg. Moon age: 12.18 days

Avg. Moon phase: 14.75%

Bortle Dark-Sky Scale: 8.00

Basic astrometry details

Astrometry.net job: 3799228

RA center: 20h 50' 1"

DEC center: +13° 33' 39"

Pixel scale: 0.681 arcsec/pixel

Orientation: 281.869 degrees

Field radius: 0.155 degrees

Resolution: 1282x1028

Locations: Backyard White Zone Observatory, Taylor, MI, Michigan, United States

Data source: Backyard


This was a major challenge for me at 0.68"/pixel with my ES 165 at only 2 arc minutes. My inspiration for this was shot with a 80cm f/7 AstroOptik Keller corrected cassegrain in Chili:


This faint planetary nebula, Abell 72 (PK 059+18.1) in the constellation Delphinus, is an expanding glowing shell of ionized gas ejected from an old red giant star. The beautiful object of George O. Abell's Catalog of Planetary Nebula is 5'700 ± 1150 light years from earth and about 2 light years across.


Sky plot

Sky plot


Abell 72 (PK 59 -18.1) Planetary Nebula in Delphinus, 


            Douglas J Struble