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Contains:  M 31, Great Nebula in Andromeda, NGC 224, M 32, NGC 221, M 110, NGC 205
Getting plate-solving status, please wait...
M31 - HALRGB (31mm filter test), 


            Paddy Gilliland
M31 - HALRGB (31mm filter test)

M31 - HALRGB (31mm filter test)

Technical card

Resolution: 3326x2504

Dates:Sept. 21, 2015Sept. 22, 2015Sept. 23, 2015Sept. 24, 2015Sept. 25, 2015

Astrodon Ha 3nm: 12x900" bin 1x1
Astrodon Blue: 8x900" bin 1x1
Astrodon Green: 8x900" bin 1x1
Astrodon Luminance: 60x30" bin 1x1
Astrodon Luminance: 20x900" bin 1x1
Astrodon Red: 8x900" bin 1x1

Integration: 14.5 hours

Avg. Moon age: 9.58 days

Avg. Moon phase: 71.44% job: 792351

RA center: 10.676 degrees

DEC center: 41.268 degrees

Orientation: -90.842 degrees

Field radius: 1.334 degrees

Locations: FOVO - Field of View Observatory, Home, Worcestershire, United Kingdom


Apologies to those who somehow saw my test version in the staging area! Not sure why that went out for all to see.

Another M31....but

I needed to test new un-mounted 31mm LRGB and nice FoV on this object so seemed like a nice easy start although battling against the moon curtailed any further data collection.

I was very pleased to see the tiny galaxy at the bottom right pop out so lum data performing well.

Rev B,C,D - Trying to find best balance, think that will do for now. Detail a lot more subtle and got rid of earlier blockiness. Lesson learnt here is that sometimes RGB lightness is nicer than the actual lum filter!

The Andromeda Galaxy (/ænˈdrɒmɨdə/), also known as Messier 31, M31, or NGC 224, is a spiral galaxy approximately 780 kiloparsecs (2.5 million light-years) from Earth.[4] It is the nearest major galaxy to the Milky Way and was often referred to as the Great Andromeda Nebula in older texts. It received its name from the area of the sky in which it appears, the constellation of Andromeda, which was named after the mythological princess Andromeda. Being approximately 220,000 light years across, it is the largest galaxy of the Local Group, which also contains the Milky Way, the Triangulum Galaxy, and about 44 other smaller galaxies.

The Andromeda Galaxy is the most massive galaxy in the Local Group as well. Despite earlier findings that suggested that the Milky Way contains more dark matter and could be the most massive in the grouping, the 2006 observations by the Spitzer Space Telescope revealed that Andromeda contains one trillion stars: at least twice the number of stars in the Milky Way, which is estimated to be 200–400 billion.

The Andromeda Galaxy is estimated to be 1.5×1012 solar masses, while the mass of the Milky Way is estimated to be 8.5×1011 solar masses. In comparison, a 2009 study estimated that the Milky Way and M31 are about equal in mass,[14] while a 2006 study put the mass of the Milky Way at ~80% of the mass of the Andromeda Galaxy. The Milky Way and Andromeda are expected to collide in 3.75 billion years, eventually merging to form a giant elliptical galaxy or perhaps a large disk galaxy. - Wikipedia



Paddy Gilliland
License: None (All rights reserved)


  • M31 - HALRGB (31mm filter test), 


            Paddy Gilliland
  • M31 - HALRGB (31mm filter test), 


            Paddy Gilliland
  • M31 - HALRGB (31mm filter test), 


            Paddy Gilliland
  • Final
    M31 - HALRGB (31mm filter test), 


            Paddy Gilliland

Sky plot

Sky plot


M31 - HALRGB (31mm filter test), 


            Paddy Gilliland

In these public groups

UK Astro-Imaging