Hemisphere:  Southern  ·  Constellation: Ophiuchus (Oph)  ·  Contains:  Box nebula  ·  NGC 6309  ·  PK009+14.1
Getting plate-solving status, please wait...
NGC 6309, 


            Gary Imm
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NGC 6309

Getting plate-solving status, please wait...
NGC 6309, 


            Gary Imm
Powered byPixInsight

NGC 6309

Imaging Telescopes Or Lenses
Televue Powermate 2x 2" · Orion EON 130mm ED Triplet APO
Imaging Cameras
ZWO ASI1600MM-Cool
Astro-Physics Mach1GTO
Red · Green · Blue · OIII 3nm · Astrodon Ha 5mm
ZWO EFW · Orion 3" Field Flattener
Main Sequence Software Sequence Generator Pro · PHD2 · PixInsight 1.8
Guiding Telescopes Or Lenses
Orion 60mm Guidescope
Guiding Cameras
Orion StarShoot AutoGuider Pro Mono

Acquisition details

Sept. 7, 2017 ·  Sept. 9, 2017
Astrodon Ha 5mm: 16x300" (1h 20') (gain: 139.00) -15C bin 1x1
Blue: 12x60" (12') (gain: 139.00) -15C bin 1x1
Green: 12x60" (12') (gain: 139.00) -15C bin 1x1
OIII 3nm: 16x300" (1h 20') (gain: 139.00) -15C bin 1x1
Red: 12x60" (12') (gain: 139.00) -15C bin 1x1
3h 16'
Avg. Moon age:
17.05 days
Avg. Moon phase:

RA center: 17h14m04s.344

DEC center: -12°5437.20

Pixel scale: 0.219 arcsec/pixel

Orientation: 83.488 degrees

Field radius: 0.167 degrees

More info:Open 

Resolution: 4800x2700

Locations: Backyard (Mag 20.8 - Bortle 4.5), Onalaska, Texas, United States

Data source: Backyard


At a size of less than a minute, this planetary nebula is a tough object to image. It is located about 7000 light years away in the southern constellation of Ophiuchus. It is classified as a quadrupolar planetary nebula but I could not see evidence of multipolar structure in this image, nor could I see the central star, nor much of a resemblance to a "box". What is visible, though, are two distinct curved arms extending out in a similar pattern to galaxy arms. Unlike galaxy arms, these arms are not likely the result of rotational motion, but are static arms resulting from the influence of magnetic fields on the nebula. The presence of two foreground stars immediately next to the nebula makes the view more interesting.


Sky plot

Sky plot


NGC 6309, 


            Gary Imm