Feel The Space

As our closest galactic neighbour, I’ve imaged M31 the Andromeda Galaxy five times since beginning my personal astrophotography journey in 2014, each time using my William Optics GT81 apo refractor – first with a DSLR, then a ASI1600mm-Cool and most recently ASI294MM cameras.  Andromeda is perhaps the perfect object for my equipment, as it just fits the field-of-view of the aforesaid set-up, which produces something of an up-close-and-personal image of this alluring galaxy. But despite the success of these images, perhaps there’s an alternative view?

This year, I therefore deployed my Samyang 135 + ASI1600MM-Cool rig to capture 6 ½ hours of Andromeda, the result of which shows a whole new perspective of M31.  The widefield format of this lens produces greater context than previous images, whilst still obtaining excellent details and colours of the galaxy itself.  As a result, this final image (see above) better reveals the galaxy in its true glory deep in space, which in some ways I believe can be more powerful than the more popular close-up renditions of this impressive object (M31 with star reduction applied to the image below).   

 IMAGING DETAILS
ObjectM31 Andromeda Galaxy
ConstellationAndromeda
Distance2.5 million light-years
Size  3.2o x 1or 220,000 light-years           
Apparent Magnitude+3.44  
  
Scope  / LensSamyang 135 @f2.8  
MountSW AZ-EQ6 GT + EQASCOM computer control & Cartes du Ciel
Guiding Sky-Watcher EvoGuide 50ED
 + Starlight Xpress Lodestar X2 camera & PHD2 guiding
CameraZWO1600MM-Cool mono  CMOS sensor
 FOV 7.5o x 5.67o Resolution 5.81”/pix  Max. Image Size 4,656 x 3,520 pix   
EFWZWOx8 EFW & 31mm ZWO LRGB & 7nm Narrowband filters 
Capture & ProcessingAstro Photography Tool + PHD2 + Deep Sky Stacker, PixInsight v1.8.8-12, Photoshop CC, Topaz Denoise
Image Location              & OrientationCentre:  RA 00:42:34.682      DEC +41:14:06.324                         Right = North   Top = East 
ExposuresL 75 x 60 sec, R 27x  G27x B22 x 180 sec, Ha 17 x 300 sec Total Integration Time: 6hr 28 min     
 @ 139 Gain   21  Offset @ -15oC    
CalibrationDarks, Flats & Flat Darks   
Location & DarknessFairvale Observatory – Redhill – Surrey – UK        Typically Bortle 5-6
Date & Time17th, 21st & 22nd November 2022  @ +20.00h  
WeatherApprox. <=5oC   RH >= 85%                  🌙 approx. New Moon

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