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Exploring the Beauty of Reflection Nebulae: IC 2169

Dreyer's Nebula - Reflections in Monoceros

Perhaps among the most beautiful targets to image in our night sky. There are no less than five reflection nebulae in the photograph. They are contrasted by large areas of ionized hydrogen showing as red in the image.

IC 2169, popularly known as Dreyer’s Nebula, is a large blue reflection nebula located in the constellation Monoceros (the Unicorn). It is a primary feature of the Monoceros R1 complex. This is a region of active star formation situated approximately 2,500 to 2,700 light-years away from Earth. It’s in a massive starfield!

The nebula has a distinctive blue hue. This color occurs as interstellar dust particles scatter blue light from nearby hot, young stars. It is primarily illuminated by the massive B-type stars of the young open cluster Collinder 95. Some sources also associate its glow with the variable star T Orionis or the star HD 45677.

The Nebula is often referred to as Dreyer’s Nebula. This name honors John Dreyer, who compiled the NGC and IC catalogs. However, it was actually discovered by Barnard. The nebula is also designated as IC 447. This duplication exists because it was recorded twice in the Index Catalogue (IC) due to separate observations by Edward Barnard. It is located about 2 degrees west of the more famous Cone Nebula and the Christmas Tree Cluster (NGC 2264). It is often imaged alongside smaller reflection nebulae such as IC 446, NGC 2245, and NGC 2247.

I took this photograph from my driveway in the foothills of the Blue Ridge Mountains in western North Carolina. Here, I enjoy a bortle 4/5 sky. Continued development pushes it ever closer to a 5. Imaged with a Skywatcher Esprit 120ED telescope at 840mm focal length and a ZWO ASI2600MC camera cooled to 14f. These are mounted on a Skywatcher Eq6r Pro equatorial mount. It runs EQMOD and guides via PHD2. This is done through a ZWO OAG and an ASI290mm mini guide camera.

Component control is done by APT. Session automation and image acquisition are also managed by APT. These are the magic dust in getting the 143 5 minute subframes. The subframes were manually calibrated, debayered, aligned, integrated, and processed to the targets natural colors using PixInsight.

Astrobin link for acquisition details and annotated image.

Exploring Messier 48: A Bright Open Star Cluster

Messier 48 or M48, also known as NGC 2548, is a bright open cluster of stars. It is located in the equatorial constellation of Hydra. It is located near Hydra’s westernmost limit with Monoceros. The location is about 18° 34′ to the east and slightly south of Hydra’s brightest star, Alphard.

The cluster contains roughly 80 to 165 stars, with about 50 stars brighter than magnitude 13. Its population includes three yellow giant stars.
It is estimated to be around 300 to 450 million years old. This makes it an intermediate-age cluster, younger than the Hyades but older than the Pleiades.
The number of very bright blue giant stars intrigues me. This forms a contrast with a few yellow giants.

Astrobin link for acquisition details and annotated image

Astrophotography Insights: NGC 247 and Its Mysteries

NGC 247 (also known as Caldwell 62) is an intermediate spiral galaxy located approximately 11.1 million light-years away in the constellation Cetus. It is a prominent member of the Sculptor Group, one of the closest galaxy clusters to our own Local Group. At a dec of -20, it’s as far south as I can image. I do this from my driveway here in the forest of western North Carolina.

The “Needle’s Eye” / “Claw” Galaxy: It has an unusual nickname. It’s called the “Needle’s Eye” because of an unusually large void or “hole” on one side of its spiral disk. This region contains older, redder stars. It lacks younger, bluer stars. This indicates that star formation there stopped about a billion years ago. Spanning about 70,000 light-years in diameter, it is smaller than the Milky Way and is viewed nearly edge-on from Earth.

Burbidge’s Chain: In deep images, a striking string of four distant background galaxies is visible. They are roughly 300 million light-years away. This string is located just to the north-east of NGC 247. These were a bonus I found in my image as I was processing it. I never saw them in the faint subframes. The difference between 11 million and 300 million light-years.

Astronomers speculate the galaxy’s distinctive void may have been caused by gravitational interaction with a “dark subhalo.” Another possibility is that another galaxy passed through its disk. While the void is quiet, the rest of the disk features bright pink H II regions. These are knots of glowing hydrogen gas where new stars are actively forming.

Astrobin version for acquisition details and annotated image.

What Makes vdB 13 a Captivating Celestial Object?

vdB 13 is a bluish reflection nebula cataloged in Sydney van den Bergh’s 1966 VdB Catalogue of 159 reflection nebulae.

Situated approximately 1,000 light-years away in the constellation Aries (at the northeast corner). It is part of the western edge of the Perseus Molecular Cloud.

The nebula is illuminated by the star HIP 15984, a blue star of spectral type B8. It has an apparent magnitude of approximately 8.25.

VDB 13 is surrounded by dust and a dark nebula structure. The dusty blue reflection nebula shines prominently through the darkness. It is these dark lanes that provide the contrast and thus the eerie beauty within the image.

Astrobin link for acquisition details and an annotated image.

Exposing Sh2-225 / LBN 778

Sh2-225 (also known as LBN 778) is a faint emission nebula and H II region located in the constellation Auriga. It is situated within the Perseus Arm of the Milky Way. The nebula is estimated to be approximately 12,060 light-years (3,700 parsecs) away from Earth.

I found this to be a fascinating area. There are large bulges of Hii in the background. They are partially obscured by foreground dust. A bright patch of Hii is lit up in the middle. That bright bit is Sh2-225.

Often described as extremely faint, it appears near the more prominent supernova remnant Sh2-224 (the “Rice Hat” nebula). Some deep imaging suggests it may be part of a larger ring-like or ball-shaped structure obscured by dark nebulosity. Due to its low surface brightness, it is a difficult target for astrophotography.

Astrobin link for the acquisition details and annotated image.

Discovering a colorful gem in Canis Major – Sh2-301

Sh2-301, or Gum 5, is an emission nebula in the constellation of Canis Major. At a declination of -18 this little gem sits at the edge of my southerly reach. It’s unusual to find an Hii target this far south, although there are a few.

This nebula is rich in Oxygen, Hydrogen, and Sulfur emissions. It is often overlooked because it’s close to Thor’s Helmet and the Vela super nova remnant. It has a lot of structure as well. There are many small columns of dust and gas. You can also see wispy blue areas of oxygen and a nice Bok globule in the center.

Additionally there are 4 galaxies and 2 LBN targets in the image. Astrobin link for acquisition details and annotated image.

I happened upon this target after watching Gary Imm on the Astro Imaging Channel SAIC you tube channel. He went through a very interesting presentation on the Sharpless catalog and his approach to imaging it. Following that, I was looking through his images and this target caught my eye.

Session automation and image acquisition by APT. 132 subframes taken with an RC8 telescope at 1625mm fl and an ASI071MC Pro camera cooled to 15f. These ride atop a Skywatcher Eq6r Pro Equatorial mount. Subframe calibration, alignment, integration, and processing in PixInsight.

Exploring Sh2-206: The Fossil Footprint Nebula

Sh2-206 is also known as NGC 1491 or the Fossil Footprint Nebula. It is an emission nebula located approximately 10,700 light-years away in the constellation Perseus. The nebula gets its deep red coloration from the ionized hydrogen gas. The “Fossil Footprint” nickname comes from its distinctive shape in images.

It is a typical target for astrophotography during the late autumn and winter months in the Northern Hemisphere. Astrobin link for acquisition details and annotation.

This image contains 187 3 minute subframes captured from my driveway using APT. This natural color image was calibrated, integrated, and processed using PixInsight.

vdB 16 a Reflection in Aires

LBN 746 is a reflection nebula located approximately 947 light-years away in the constellation Aries. It is part of the Lynds’ Catalogue of Bright Nebulae. It is often identified as a portion of the larger vdB 16 (van den Bergh 16) nebulosity.

LBN 746 is embedded within a dense region of cosmic dust. It is surrounded by dark nebulae. These include LDN 1452 and several Barnard objects such as Barnard 202, 203, 204, and 206.

LBN 746 is situated near the border of Aries and Taurus. It lies about 7 degrees northwest of the Pleiades star cluster.
For Astro photographers, this region is known for its complex mix of “light and dust.” Capturing the subtle interactions between the blue reflection light of vdB 16 is a detailed process. Observing the surrounding dark molecular clouds requires time. Long exposure photography is necessary.

Image acquisition and session automation using APT. This image consists of approximately 12 hours of exposure. The equipment used included an RC8 telescope and an ASI071MC Pro camera. They were mounted on a skywatcher Eq6r Pro Mount. Subframe calibration, alignment, integration, and processing performed manually in PixInsight. Astrobin link for all the details.

Exploring multiple Sharpless targets in 1 frame – Sh2-192, 193, 194

3 Sharpless targets in 1 frame - Sh2-192, 193, 194

An uncommon bonus is that this image includes three members of the Sharpless Catalog of 313 HII regions. These are emission nebulae in the northern hemisphere. They are Sh2-192; Sh2-193; and Sh2-194. Sh2-192 is the very faint nebula in the middle of the image. Sh2-193 is the larger, still faint, nebula just below Sh2-192. Sh2-194 is the larger bright ball of gas to the right of both of the others.

Sh2-192 is an emission nebula located in the constellation Cassiopeia. Sh2-192 is part of a small group of nebulae. This group includes Sh2-193 and Sh2-194. They are located near the larger and well-known Heart and Soul Nebulae (IC 1805 and IC 1848).

Image captured using APT for session management and automation. Processed manually in PixInsight to its natural color.

See the Astrobin link for gear used, exposures, annotated image, etc.

The Bear Claw Planetary Nebula – Sh2-200

This is round two for me on this target. The first experienced significant reflections from the Antlia Quad Broadband LP filter. So, I’m back at it during the full moon using the Radian Ultra Quad-Band narrow band filter.
This beautiful but faint planetary nebula was imaged from my driveway at home. It was discovered in 1983 by the astronomers Herbert Hartl, Johann Dengel, and Ronald Weinberger. In 1987, further narrowband observations detected a large faint outer halo extending further than the central shell. However, it wasn’t confirmed to be a true genuine planetary nebula until 2017.

It has been given the name of Bear Claw Nebula for the imprint found on the central shell. Looks a lot like a bears print. This could be the faintest object I’ve ever attempted to image. After many hours of integration the Nebula began to appear. Individual subs showed absolutely nothing but stars and it is an impressive starfield! This is 15 hours of exposure using 156 6 minute subs.

Imaging sessions controlled and automated by Astro Photography Tool (APT 4.65.2). Two nights from 11/3/2025 using 360″ exposures on a RC8 telescope and ASI071MC camera atop an Eq6r Pro mount. 15 hours of exposure. Processed manually in Pixinsight.