Telescope: Astro-Tech 8” f/8 Ritchey-Chretien, Orion Atlas EQ-G

Camera: Canon EOS Ra, Baader Mk III MPCC

Filter: GSO IR blocking filter

Guide scope: Astro-Tech 60mm, Starlight Xpress Super Star, PHD2

Exposure: 32x60sec, ISO 800, saved as RAW

Darks: Internal (Long Exposure Noise Reduction On)

Flats: 32×1/2sec, Tee shirt flats taken at dusk

Average Light Pollution: Red zone, Bortle 8, poor transparency

Lensed Sky Quality Meter: 18.2

Stacking: Mean with a 1-sigma clip.

White Balance: Nebulosity Automatic

Software: Backyard EOS, Deep Sky Stacker, Nebulosity, Photoshop

For a long time there was some debate as to whether the two clusters that make up the Double Cluster are actually associated with each other or just happened to appear in the same line of sight with one lying behind the other. It now appears that they are indeed lying next to each other, each about 7,000 light years away and about 100 light years apart. However, there is some evidence that the two clusters are of different ages, so while they may have formed separately from each other, they are now traveling companions.

I normally crop these images to give a 4:3 aspect ratio, but I left this one as it came out of the camera to show how well the RC8 covers a full frame sensor. The Double Cluster is currently high in the northwest after sunset.

Telescope: Astro-Tech 8” f/8 Ritchey-Chretien, Orion Atlas EQ-G

Camera: Canon EOS Ra, Baader Mk III MPCC

Filter: Orion Imaging Skyglow Filter

Guide scope: Astro-Tech 60mm, Starlight Xpress Super Star, PHD2

Exposure: 20x120sec, ISO 800, saved as RAW

Darks: Internal (Long Exposure Noise Reduction On)

Flats: 32×1/125sec, Tee shirt flats taken at dusk

Average Light Pollution: Red zone, Bortle 8, poor transparency

Lensed Sky Quality Meter: 18.0

Stacking: Mean with a 1-sigma clip.

White Balance: Nebulosity Automatic

Software: Backyard EOS, Deep Sky Stacker, Nebulosity, Photoshop

NGC 253 is a large, beautiful spiral galaxy located in the faint southern constellation of Sculptor. Although it is one of the brightest galaxies in the sky, it is so far south that it is relatively difficult from mid-northern latitudes. From my backyard it never gets much higher than about 25 degrees above the southern horizon where skyglow is always a challenge. On this particular evening the transparency was really bad and I gave this a try just for yucks. I was very surprised that it turned out as well as it did.

NGC 253 is currently low in the southwest at sunset.

Telescope: Astro-Tech 8” f/8 Ritchey-Chretien, Orion Atlas EQ-G

Camera: Canon EOS Ra, Baader Mk III MPCC

Filter: Orion Imaging Skyglow Filter

Guide scope: Astro-Tech 60mm, Starlight Xpress Super Star, PHD2

Exposure: 12x120sec, ISO 800, saved as RAW

Darks: Internal (Long Exposure Noise Reduction On)

Flats: 32×1/2sec, Tee shirt flats taken at dusk

Average Light Pollution: Red zone, Bortle 8, fair transparency

Lensed Sky Quality Meter: 18.4

Stacking: Mean with a 1-sigma clip.

White Balance: Nebulosity Automatic

Software: Backyard EOS, Deep Sky Stacker, Nebulosity, Photoshop

NGC 404 is a faint (Mv 10.3) elliptical galaxy located just 7 arc-seconds northwest of Mirach (beta Andromeda, Mv 2.1). Mirach is a red giant lying about 200 light years away, while NGC 404 is 10 million light years distant, just outside the Local Group of which our galaxy is a member. It is a relatively small galaxy with an estimated diameter of only 9,600 light years.

This is one of my favorite easy to find targets. I first came across Mirach’s Ghost when using Mirach as an alignment and focusing target. Visually it can be a bit of a challenge to spot at first, but once you glimpse it then it becomes fairly obvious.

NGC 404 is currently well-placed high overhead in the early evening.

Telescope: Astro-Tech 8” f/8 Ritchey-Chretien, Orion Atlas EQ-G

Camera: Canon EOS Ra, Baader Mk III MPCC

Filter: Orion Imaging Skyglow Filter

Guide scope: Astro-Tech 60mm, Starlight Xpress Super Star, PHD2

Exposure: 22x120sec, ISO 800, saved as RAW

Darks: Internal (Long Exposure Noise Reduction On)

Flats: 32×1/2sec, Tee shirt flats taken at dusk

Average Light Pollution: Red zone, Bortle 8, fair transparency

Lensed Sky Quality Meter: 18.6

Stacking: Mean with a 1-sigma clip.

White Balance: Nebulosity Automatic

Software: Backyard EOS, Deep Sky Stacker, Nebulosity, Photoshop

M110 is the larger and fainter of two prominent satellite galaxies of M31, which is in the lower left corner of this field. Most elliptical galaxies tend to be relatively featureless, but M110 shows some hints of structure and dust lanes near its core. Visually M110 is relatively faint and diffuse, lying on the opposite side of M31 from the smaller and brighter M32.

M110 along with M31 and M32 are currently well-placed high overhead in the early evening.

Telescope: Astro-Tech 8” f/8 Ritchey-Chretien, Orion Atlas EQ-G

Camera: Canon EOS Ra, Baader Mk III MPCC

Filter: Orion Imaging Skyglow Filter

Guide scope: Astro-Tech 60mm, Starlight Xpress Super Star, PHD2

Exposure: 33x180sec, ISO 800, saved as RAW

Darks: Internal (Long Exposure Noise Reduction On)

Flats: 32×1/20sec, Tee shirt flats taken at dusk

Average Light Pollution: Red zone, Bortle 8, fair transparency, bright moonlight

Lensed Sky Quality Meter: 17.5

Stacking: Mean with a 1-sigma clip.

White Balance: Nebulosity Automatic

Software: Backyard EOS, Deep Sky Stacker, Nebulosity, Photoshop

This is M81 (bottom) and M82 (top), two bright spiral galaxies lying about 12 million light years away in Ursa Major. At present, these two galaxies are about 150,000 light years apart, though a few hundred million years ago the two passed very close to each other. The dark dust lane slashing across M82 is one result of this close encounter with M81 as are the blue star formation regions in M81. Visually, M81 and 82 are fairly easy to see with a modest telescope even from my light polluted backyard. M81 shows its beautiful soft core similar to M31 while M82 shows its elongated shape interrupted by the dust lanes giving it a very irregular shape.

M81 and M82 is currently rising in the northeast as the sky darkens.

Telescope: ES DHL Comet Hunter MN6 at f/4.8, Orion Atlas EQ-G

Camera: Baader modified Nikon D610

Filter: 2” Radian Triad Ultra Hb, OIII, Ha, SII filter

Guide scope: Williams Optics 50mm, ASI290MM mini, PHD

Exposure: 12x300sec, ISO 400, saved as RAW

Darks: Internal (Long Exposure Noise Reduction On)

Flats: 32×1/5sec, tee shirt flats taken at dusk

Average Light Pollution: Red zone, fair transparency

Lensed Sky Quality Meter: 18.6 mag/arc-sec^2

Stacking: Mean with a 1-sigma clip.

White Balance: Nebulosity Automatic

Software: Backyard Nikon, Nebulosity, Deep Sky Stacker, Photoshop

This is a very busy region of the sky near Alnitak, the eastern star in the belt of Orion. Alnitak is the brilliant star at the top of this field. NGC 2024 (the Flame Nebula) is to the left and the beautiful red emission nebula IC 434 drapes down the center of the field with the iconic Horsehead Nebula (Barnard 33) pushing up through it. To the left are the reflection nebula NGC 2023 and the tiny IC 435. To the lower right is Sigma Orionis, a wonderful complex of stars that is a fine target for binoculars and small telescopes. In larger scopes it resolves into a wonderful group of double and triple stars.

Alnitak rises in the east as the sky darkens.

Telescope: ES DHL Comet Hunter MN6 at f/4.8, Orion Atlas EQ-G

Camera: Baader modified Nikon D610

Filter: 2” Radian Triad Ultra Hb, OIII, Ha, SII filter

Guide scope: Williams Optics 50mm, ASI290MM mini, PHD

Exposure: 22x300sec, ISO 400, saved as RAW

Darks: Internal (Long Exposure Noise Reduction On)

Flats: 32×1/5sec, tee shirt flats taken at dusk

Average Light Pollution: Red zone, fair transparency

Lensed Sky Quality Meter: 18.6 mag/arc-sec^2

Stacking: Mean with a 1-sigma clip.

White Balance: Nebulosity Automatic

Software: Backyard Nikon, Nebulosity, Deep Sky Stacker, Photoshop

NGC 1499 is a part of a vast expanse of interstellar hydrogen set aglow by the nearby Xi Perseus (Menkib) in the lower right of this field. This section of the nebula lies about 1,000 light years away and is about 100 light years in length.

NGC 1499 is currently high in the northeast as the sky darkens. (Photo credit; John Graham, 11/6/2021)

Telescope: ES DHL Comet Hunter MN6 at f/4.8, Orion Atlas EQ-G

Camera: Baader modified Nikon D610

Filter: 2” Radian Triad Ultra Hb, OIII, Ha, SII filter

Guide scope: Williams Optics 50mm, ASI290MM mini, PHD

Exposure: 23x180sec, ISO 400, saved as RAW

Darks: Internal (Long Exposure Noise Reduction On)

Flats: 32×1/5sec, tee shirt flats taken at dusk

Average Light Pollution: Red zone, poor transparency

Lensed Sky Quality Meter: 18.3 mag/arc-sec^2

Stacking: Mean with a 1-sigma clip.

White Balance: Nebulosity Automatic

Software: Backyard Nikon, Nebulosity, Deep Sky Stacker, Photoshop

The Helix is one of the closest planetary nebula with a distance of only 650 light years. It spans a diameter of about 2.5 light years and is relatively young with an age estimated to be about 10,600 years. NGC 7293 is one of those wonderful objects that hides in plain sight. It is so large (about half the size of the full moon) that its light is spread out over a large area, making it very difficult to see and all but invisible from my red-zone backyard.

NGC 7293 is currently in the southwest as the sky darkens.