Messier 27 (aka Dumbbell Nebula)

All Images Copyright Steve Cannistra

Please click here for a medium-size (50%).

Position Angle: 0 degrees
RA: 19h 59m 35s (J2000)
Dec: +22degrees 42' 52" (J2000)

Messier 27, also known as the Dumbbell Nebula, was the 27th object categorized by Messier during his search for objects that could be confused for comets.  M27 is a planetary nebula, which represents the end stage of stars about the same size as our Sun (in contrast, stars much larger than our Sun typically undergo a supernova explosion).   Such stars experience a phase of continued helium burning on their surface, long after the fuel in their core has been exhausted.  The outer layer is shed into space, igniting surrounding elements such as hydrogen through excitation by the solar wind and heat.  The term "planetary" nebula is a misnomer and was coined by Herschel, based upon its superficial visual resemblance to his recently discovered planet, Uranus.  More information about M27 may be found here.

Photographic Details:
Dates of image acquistion:  June 13, 14, 15, 2022
Scope:  Celestron 9.25" standard SCT (native f10) with 0.63 focal reducer (spaced to achieve f6.1  = 1444mm effective focal length), on the Takahashi NJP Mount
Autoguider:  None
Camera:  ZWO ASI1600, -20C, 3.8 micron pixel size, image scale 0.54"/pixel given above set up
Filters:  Baader Ha and OIII narrowband filters; ZWO 7-position filter wheel for 2" filters
Exposures:  Total exposure 5.5 hours
(3 hours Ha, 2.5 hours OIII, 60sec subs, unguided dither every 2 subs, ASI1600 Gain 200, offset 40, Read noise 1.55 e rms)
Post-processing:  Calibrated, aligned and stacked in Maxim, followed by DDP in ImagesPlus (IP) and processing in Photoshop CS

Please note:  Graphics on this website may not be reproduced without author permission.

Back to Latest Images

Back to Nebulae