NGC 2403 - TEC140
NGC 2403 is a spiral galaxy located about eight million light years away in the constellation of Camelopardalis in the Northern hemisphere. It is an outlying member of the M81/M82 group. You will note that it bares a striking resemblance to M33 and contains huge HII star forming regions. NGC2403 is much smaller than our own galaxy, being only about 50000 light years in diameter as opposed to about 120000 light years for our own Milky Way galaxy. It is not known why a smaller galaxy like this should have such huge HII regions that dwarf those of our own, larger galaxy.
Image Technical Data
Imaged from my backyard, March 2019, in Nottingham, UK. I used my TEC 140 refractor with Atik 460 CCD camera and Astrodon LRGB filters. Image acquisition data, everything binned 1x1
Luminance 29 x 600s; Red 12 x 300s; Green 12 x 300s; Blue 12 x 300s
M15 The Globular Cluster in Pegasus
M15 is a magnificent Globular Cluster in the constellation of Pegasus, which after M13 and M92 is arguably the best one visible to Northern Hemisphere observers.
It is located about 34000 light years away and is about 125 light years in diameter with an age of 12 billion years, it is as old as the Milky Way itself.
Image Technical Data
Imaged with my TEC 140 refractor and Atik 460 CCD camera September 24th 2018. Mount is my MESU 200 guided with off-axis guiding.
Red 22 x 300s 1×1; Green 12 x 300s 1×1; Blue 19 x 300s 1×1
Total Integration of the data set is about four and a half hours. Note that I did not use a separate luminance channel and instead I binned each of the RGB channels 1x1. I remain to be convinced of the need to capture a separate luminance channel with either globular or open clusters.
Image processing is with PixInsight and data collected with Sequence Generator Pro.
NGC 7331 TEC 140 Refractor - The Deer Lick Group
NGC 7331 (Caldwell 30) is a spiral galaxy about 46 million light years away in the constellation of Pegasus. It is a vibrant and colorful galaxy, often referred to as the Milky Way's "twin" due to it being of a similar size and mass to our own galaxy. It is visible in amateur telescopes as a faint smudge if the sky is dark.
In the images below, the smaller galaxies to the left of the main galaxy are a chance line-of-sight alignment. These four galaxies are much more distant than NGC 7331 (about 320 million light years) and are nothing to do with the main galaxy. This collection of galaxies (NGC 7331 and the distant background galaxies are collectively referred to as the Deer Lick Group named after the Deer Lick gap in the mountains of North Carolina by astronomer Tomm Lorenzin who liked to observe from there.
Image Technical Data
Imaged over two nights on the 21st and 22nd September 2019 with my TEC 140 refractor from my backyard in Nottingham, UK. I used my Atik 460 CCD camera with Astrodon LRGB Generation 2 E-series 1.25" filters. I used my MESU 200 mount that was guided via OAG.
Luminance 24 x 600s 1×1; Red 12 x 300s 2×2; Green 12 x 300s 2×2; Blue 12 x 300s 2×2
Total Integration of the data set is seven hours. It would benefit from the addition of more data but I am quite content with it now as it is.
Image processing with PixInsight and data collected with Sequence Generator Pro.
In the second version I processed the data slightly differently with a bit more focus on the red spectrum of the galaxy in the absence of any Hydrogen Alpha data. However, I think this is slightly too much and I prefer the first image as more natural. However, I include it here as an interesting contrast in the different approaches that can be taken to astronomy image processing with the same data set with differing emphases that can be quite subjective.
Abell 1656 TEC 140
Abell 1656 - The Coma Cluster - is a cluster of galaxies in the constellation of Coma Berenices, located about 320-330 million lights years away. The cluster is dominated by two supergiant elliptical galaxies NGC 4874 and NGC 4889 which are visible in this image in the centre below the bright blue star (which is local to our own galaxy). NGC 4889 is the largest and most massive galaxy in the local universe and is vsoble in modest amateur telescopes despite the great distance. It contains the most massive black hole yet discovered. The galaxy itself is estimated to have more than 1000 times the mass of opur own Milky Way galaxy.
Image Technical Data
Image acquired spring 2020 (during the Coronavirus lockdown) in my backyard in Nottingham, UK. It was acquired with TEC 140 refractor (with field flattener) with Atik460 CCD camera and Astrodon LRGB Gen2 E series filters on my MESU 200 mount. Guiding was via off-axis guider.
Luminance 30 x 300s 1x1; Red 14 x 300s 2x2; Green 15 x 300s 2x2; Blue 14 x 300s 2x2
Data processed with PixInsight and Photoshop and data collected with SGP Pro and guided with PHD2.
IC1396 with Samyang 135mm
IC1396 - "the Elephant's Trunk Nebula" is a huge emission nebula in the constellation of Cepheus, about 2500 light years away. It has a huge angular diameter of about 2 x 3 degrees so it requires a wide field telescope/lens to capture it in its entirety.
It is a very popular imaging target both in a wide field setting like this picture and also as close up views of the "trunk" that you can see in the image at the 6 o'clock position.
Image Technical Data
Image data acquired September 13th 2019 from my backyard in Nottingham, UK. This image was taken with my Samyang 135mm lens with G2-8300 CCD camera and Astrodon RGBHa filters on NEQ6 mount. Everything is 300s in this image and binned 1x1:
Ha (3nm) x 13; Red x 12; Green x 8; Blue x 14
Sh2-202 (Sharpless 202) Samyang 135mm
This image shows Sh2-202 glowing to the left of centre with the top of the Soul Nebula at the bottom. Several other Sharpless Catalogue objects are also visible together with a few objects from the VdB catalogue.
Image Technical Data
This image was captured from my back yard with my widefield rig consisting of my Samyang 135mm lens with Moravian Instruments G2-8300 CCD camera and Astrodon RGBHa filters. I used my NEQ6 mount. The data was acquired when the object was overhead from Nottingham UK on 29 November 2019. All data acquired in one imaging run and all exposures binned 1x1 and 300seconds:
Ha(3nm) 180 mins, Red>50mins, Blue>45mins,Green>45mins
I hope you like it!