Night Sky – Page 3 – Semper Iuvenis Photography

Virgo Galaxy Cluster

This is a wide field view of the Virgo Cluster of galaxies. There are 14 galaxies solved and annotated. A brief description of several galaxies is provided. An annotated version is available in the astrobin link – click the image.

NGC 4638 is a lenticular galaxy in the Virgo constellation with a magnitude of 12.1. It’s about 50 million light-years away and is a member of the Virgo Cluster. Astronomer William Herschel discovered NGC 4638 on March 15, 1784. NGC 4638 is very bright and moderately large, with an edge-on disk and a diffuse, boxy halo. The halo has a shallow surface brightness gradient, which is characteristic of a large spheroidal galaxy.

NGC 4637 is a lenticular galaxy in the Virgo constellation with a magnitude of 12.711. It was first discovered by R.J. Mitchell on March 1, 1854, and is located near the celestial equator.

M 59 – Messier 59 (M59), also known as NGC 4621, is an elliptical galaxy in the constellation Virgo, about 50 million light-years away from Earth. It is part of the Virgo Cluster, which contains about 2,000 galaxies, and is one of the largest elliptical galaxies in the cluster. M59 has an absolute magnitude of -22.82 and a magnitude of 9.6. It has an estimated mass of 250 billion suns, which is greater than the Milky Way, but only a quarter of that of its nearby companion M-60.

M 60 – Messier 60 (M60), also known as NGC 4649, is an elliptical galaxy located in the Virgo constellation, about 54 million light-years from Earth. It’s about half the size of the Milky Way, but contains an estimated 400 billion stars, which could be four times the amount in our galaxy. M60 is about 60,000 light-years across and has an apparent magnitude of 9.8. M60 contains one of the most massive black holes known, with a mass of about 3.4 billion times the Sun’s mass. This black hole makes up 15 percent of the galaxy’s mass, which is too big to have formed inside a dwarf galaxy. The black hole is not producing any big outbursts of energy, and unlike the black holes in many other galaxies, it is not beaming out strong “jets” of charged particles.

NGC 4660 – NGC 4660 is an elliptical galaxy in the Virgo constellation, about 63 million light-years away. It has a magnitude of 12.16 and is part of the Virgo Cluster. Astronomer William Herschel discovered NGC 4660 on March 15, 1784. NGC 4660 contains 205 globular clusters, which is typical for its size and brightness. Globular clusters often contain hundreds of thousands of old stars

NGC 4647 – NGC 4647 is a faint, intermediate spiral galaxy in the Virgo constellation, about 63 million light-years away. NGC 4647 is about two-thirds the size of Messier 60, the third brightest galaxy in the Virgo cluster. The two galaxies have overlapping optical disks, suggesting they may be interacting. However, photographic images don’t show any evidence of gravitational interaction between the two galaxies. Studies with the Hubble Space Telescope show that a tidal interaction may have begun. NGC 4647 is part of a pair of galaxies known as Arp 116, along with Messier 60, which is an elliptical galaxy. NGC 4647 is much lower in mass than Messier 60, and is roughly the size of the Milky Way.

NGC 4607 – NGC 4607 is a barred spiral galaxy in the Virgo constellation, about 56 million light-years away. It has a magnitude of 13.75 and is located near the celestial equator. Astronomer R. J. Mitchell discovered NGC 4607 on April 24, 1854.

NGC 4606 – NGC 4606 is a barred spiral galaxy in the Virgo constellation, about 55 million light-years away. It has a magnitude of 12.67, an apparent diameter of 2.8 arc minutes, and is located near the celestial equator. Because of this, it is at least partially visible from both hemispheres at certain times of the year.

IC 3704 – IC 3704 is a barred spiral galaxy in the Virgo constellation, near the celestial equator.

Sh2-302 – Snowman Nebula

Sh2-302, also known as the Snowman Nebula, is a red emission nebula located in the constellation Puppis, about 5,800 light years away. It’s part of the Gum Nebula, which occupies the lower southern skies in winter. The nebula has a visual diameter of 15 arc minutes and is located near the boundary between Puppis and Canis Major.

Sh2-302 is one of many objects in a catalog compiled by astronomer Stewart Sharpless to identify areas of interstellar ionized hydrogen, or HII regions.

I captured this photograph Feb 18, 2024 and March 13, 2024 using a Skywatcher Esprit 120ED telescope at a fl of 840mm and a ZWO ASI071MC Pro astrophotography camera with an Antlia quad-band light pollution filter. These are mounted on a Skywatcher EQ6r Pro German Equitorial Mount. The image acquisition software that controls everything is APT (Astro Photography Tool). Total exposure of 4.4 hrs. 75 exposures were integrated and processed using Pixinsight.

vdB 27 – a Reflection in Taurus

Sometimes you are pleasantly surprised by what comes from these reflection nebula. Other times not so much. This image was centered on VdB 27 (catalogued also as Ced 31) – a small reflection nebula in the constellation Taurus. The nebula is illuminated by the radiation of the variable star RY Tauri.

All the image acquisition info, along with an annotated version of this image, is here in my Astrobin page. A dark nebula (B 214) and a bright nebula (LBN 785) along with a few stars.

This small reflection nebula is usually captured as part of a wide field image of this part of the Taurus Molecular cloud. From my driveway here in the hills of NC, I chose to narrow that view a bit and image it with a RC8 at a focal length of 1628mm using the ASI071MC Pro camera with a Antlia Quadband light pollution filter.

This is 110 3 minute exposures taken Feb 13 and 14, 2024 for 5.5 hours of total exposure.

Bode’s Galaxy – Messier 81

M 81 is a spiral galaxy with long thin faint dust trails extending from its arms in the constellation Ursa Major. It’s about 11.8 million light-years away from Earth and has an apparent magnitude of 6.94. M81 is one of the brightest galaxies in the night sky and is visible with binoculars or a telescope.

Its size and well-defined spiral arms make it an enjoyable sight through almost any telescope or even a pair of binoculars. A telescope with an aperture of 8″ or more will show more detail under dark skies.

This image consists of a little over 9 hours of exposure taken with a RC8 telescope at 1625mm, the ASI071MC Pro cooled astro camera, all riding on an EQ6r Pro German Equatorial Mount. Image acquisition was controlled by APT with long exposure guiding by PHD2. The image was processed manually in PIxinsight.

M81 is nicknamed “Bode’s Galaxy” after it was discovered by German astronomer Johann Elert Bode in 1774.

M 51 – Whirlpool Galaxy

M51, also known as Messier 51a or NGC 5194, is a spiral galaxy in the constellation Canes Venatici. It’s located 31 million light-years from Earth. M51’s arms are made of long lanes of stars, dust, and gas, and appear like a staircase. Sometimes the designation M51 is used to refer to the pair of galaxies, in which case the individual galaxies may be referred to as M51a (NGC 5194) and M51b (NGC 5195).

The Whirlpool Galaxy has two, very prominent spiral arms that wind clockwise. One arm deviates from a constant angle significantly. The pronounced spiral structure of the Whirlpool Galaxy is believed to be the result of the close interaction between it and its companion galaxy NGC 5195.

As a result of the Whirlpool Galaxy’s interaction with NGC 5195, a variety of tidal features have been created. The largest of these features is the so-called Northwest plume, which extends out to 43 kiloparsecs (140,000 light-years) from the galaxy’s center. This plume is uniform in color and likely originated from the Whirlpool Galaxy itself due to having diffuse gas. Adjacent to it are two other plumes that have a slightly bluer color, referred to as the Western plumes due to their location. These plumes are what I was trying to capture and highlight in my image. Very faint trailing dust.

NGC 5195 (also known as Messier 51b or M51b) is a dwarf galaxy that is interacting with the Whirlpool Galaxy (also known as M51a or NGC 5194). Both galaxies are located approximately 31 million light-years away in the constellation Canes Venatici. Together, the two galaxies are one of the most widely studied interacting galaxy pairs.

A plate-solved and annotated version is available on my Astrobin page.

LBN 629 or Ghost of Willie G?

Basically there’s this dust patch in Camelopardalis – fairly tightly circling Polaris. How anyone ever saw and cataloged in when they did I’ll never understand. LBN 629 is a faint dust cloud in the constellation Camelopardalis, which is located in the northern celestial hemisphere.

I stretched this image beyond imagination as I processed it for the third time. The first was so bad I deleted it. The second I kept but it was horrid – this one, well it’s the best I can do with almost 28 hours of exposure from a f7 esprit 120ed and the 2600mc camera.

Personally I see a stretched view of Willie G. You?

NGC 2170 – The Angel Nebula

NGC 2170, also known as the Angel Nebula

The Angel Nebula is a reflection nebula and stellar nursery in the Monoceros constellation. It is located about 2,400 light-years away at the edge of the star-forming molecular cloud Monoceros R2.

In this classic celestial still life created with a digital paintbrush the Angel Nebula shines near the image center. Reflecting the light of nearby hot stars, NGC 2170 is joined by other bluish reflection nebulae, a red emission region, many dark absorption nebulae, and a backdrop of colorful stars.

I’ve presented this in a portrait mode to highlight the angel appearance.

Sh2-232 “Great Pumpkin” of Auriga

Sh2-232, Sharpless 232, referred to as the Great Pumpkin Nebula.

Sh2-232 is a faint, small, and diffused nebula ball in the constellation Auriga. It is located in the pentagon of Auriga, about 3 degrees northeast of IC405.

Sh2-232 is the largest and faintest of a group of diffuse nebulae in Auriga. It is ionized by two giant stars, the O9.5 III HD 37737 and an anonymous B0 II class star.

A unique feature of this target is the Planetary Nebula found in the middle of those three central stars (blue dot) – it’s named PK173+03.1. LDN1525 also features prominently as a black vein. SH2-235 looks like a companion ball of gases.

The Little Pinwheel Galaxy

NGC 3180, also catalogued as NGC 3184, is a small, relatively faint face-on symmetrical spiral galaxy in the constellation Ursa Major located just east of Tania Australis (μ-UMa), which is one of the hind paws of the Great Bear (using the convention of the Big Dipper’s handle as the tail). It is located about 40 million light years away, north of the celestial equator at a declination of +41 degrees. The faintness of the galaxy caused me to shoot 5 minutes exposures for four nights, collecting 17.75 hours of usable data. I was counting on the big variable star GP UMa shining brightly in my image. At mag 6.5 it is a bright, but manageable, yellow star.

NGC 3180 is sometimes referred to as the Little Pinwheel Galaxy. The Little Pinwheel has two prominent spiral arms that have constant pitch angles, which makes them both symmetrical. Being a face-on spiral galaxy with a diameter of about 119,000 light-years, which is roughly the same diameter as the Milky Way galaxy it somewhat resembles Messier 101, a closer and thus brighter galaxy of similar appearance. Some sources list NGC 3184 as the galaxy and refer to NGC 3180 and 3181 as HII regions of ionized hydrogen gas. Seems someone got their bits flipped somewhere, sometime. Stellarium lists it as NGC 3180, so I’ve gone with that. The catalogue in APT has the galaxy as NGC 3180 as well.

I used a GSO 8″ Ritchie-Creighton design f8 telescope at 1626mm and a ZWO ASI071MC Pro astrophotography camera riding a Sky Watcher EQ6r Pro German equatorial mount to photograph this galaxy. To overcome the faintness caused by distance, I used 213 300″ exposures captured used Astro Photography Tool (APT) and integrated them using PixInsight 1x Drizzle Integration.

M 82 – The Cigar Galaxy

A bright Starburst galaxy located in the constellation Ursa Major, about 12 million light-years away. It’s also known as the Cigar Galaxy because of its elliptical shape.

M 82 is generally photographed with M 81, Bode’s Galaxy. I pointed the 8″ RC telescope at it to get as much detail as I could on just this galaxy.

M82 is a spiral galaxy that’s undergoing a starburst, a massive burst of star formation in its core. It has a gravitatioonal interaction with its nearby galaxy, M81, which causes it to have an extremely high rate of star formation.

M82 is a prototype starburst galaxy and the second-largest member of the M81 group. It’s bright at infrared wavelength and has over 30 billion stars.

M82 can be found in the northern skies in the direction of Ursa Major, also known as the Great Bear.