Cookie consent

AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.

I agree
Contains:  M 31, Great Nebula in Andromeda, NGC 224, M 32, NGC 221, M 110, NGC 205, The star 32And
Getting plate-solving status, please wait...
Our Galactic Neighbor - Andromeda, 


            Matt Harbison
Our Galactic Neighbor - Andromeda

Our Galactic Neighbor - Andromeda

Technical card

Resolution: 3500x1858

Dates:Aug. 30, 2016Sept. 1, 2016Sept. 4, 2016

Astrodon Ha 3nm: 20x600" -5C bin 1x1
Optolong LRGB: 32x180" -5C bin 1x1
Optolong LRGB: 30x60" -5C bin 1x1

Integration: 5.4 hours

Darks: ~12

Flats: ~12

Bias: ~12

Avg. Moon age: 10.24 days

Avg. Moon phase: 4.37%

Bortle Dark-Sky Scale: 2.00 job: 1236928

RA center: 10.617 degrees

DEC center: 41.212 degrees

Pixel scale: 3.614 arcsec/pixel

Orientation: -69.165 degrees

Field radius: 1.989 degrees

Locations: Fall Creek Falls, Chattanooga, Tennessee, United States; Gee Creek, Delano, Tennessee, United States


“Our Galactic Neighbor - Andromeda”

Three panel Mosaic of Andromeda with data from imaging sessions of years past.

About - I’ve been imaging Andromeda since 2011 and finally have acquired enough data to print my image at 3ft by 6ft on the desired medium. This image reflects years of work to understand the process of acquisition, calibration, and processing. It also reflects years of sleepless nights to capture ever photon traveling towards us. 

This is a three panel mosaic with data acquired since 2014 in Chattanooga, Cleveland, Ocoee, and Fall Creek Falls. Data was star aligned and used as layers to yield the desired lightness. 

Thanks to my Wife who encourages my work, my friends in the Barnard Astronomical Society of Chattanooga, and all of the area Parks that keep our dark skies protected.

From wiki- The Andromeda Galaxy also known as Messier 31, M31, or NGC 224, is a spiral galaxy approximately 780 kiloparsecs (2.5 million light-years) from Earth. 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, Andromeda is the largest galaxy of the Local Group, which also contains the Milky Way, the Triangulum Galaxy, and about 44 other smaller galaxies. Despite earlier findings that suggested that the Milky Way contains more dark matter and could be the largest in the grouping, the 2006 observations by the Spitzer Space Telescope revealed that Andromeda contains one trillion (1012) stars: at least twice the number of stars in the Milky Way, which is estimated to be 200–400 billion.
The mass of the Andromeda Galaxy is estimated to be 1.5×1012 solar masses, while 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,while a 2006 study approximated 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 disc galaxy. The apparent magnitude of the Andromeda Galaxy, at 3.4, is among the brightest of the Messier objects,making it visible to the naked eye on moonless nights, even when viewed from areas with moderate light pollution.

Image Details-

2016- QHY 16200A
32 x 60s Red, Green, Blue
30 x 180s Luminance
20 x 600s Hydrogen

2015- ATIK 383 L+
12 x 120s Red, Green, Blue
12 x 300s Luminance
12 x 60s Luminance

2014- Canon 60D- with Hydrogen Alpha modification
30 x 300s
20 x 120s
10 x 60s

Equipment Used-

2016- Astro Physics Mach 1 Telescope Mount
QHY 16200A Monochrome CCD camera w/ Astrodon filters
William Optics 132FLT refractor
William Optics 50mm guide scope
Moonlite electronic focuser
Starlight Express Lodestar guider

2015- Astro Physics Mach 1 Telescope Mount
ATIK 383 L+ Monochrome CCD Camera w/ Baader filters
EFW2 Filter Wheel
Sky Watcher Esprit 100mm refractor
William Optics 50mm guide scope
Orion Star Shoot auto guider

2014- Celestron CGEM-DX
Canon 60D - with Hydrogen Alpha modification
Sky Watcher Esprit 100mm refractor
Orion 30mm guidescope
Orion Star Shoot auto guider

Acquistion details-
Acquired in Sequence Generator Pro. Calibrated in Pixinsight, with levels and export from Photoshop. Data from past years integrated by registration frames and star alignment tool where appropriate.



Matt Harbison
License: None (All rights reserved)

Sky plot

Sky plot


Our Galactic Neighbor - Andromeda, 


            Matt Harbison