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The Rosette Nebula is a vast and beautifully intricate cloud of glowing gas and dark dust located about 5,000 light-years away in the constellation Monoceros. Spanning roughly 130 light-years across, this immense emission nebula resembles the layered petals of a cosmic rose, with delicate arcs and filaments sculpted by powerful stellar forces.

At its heart lies the young open star cluster NGC 2244, whose hot, massive stars flood the surrounding hydrogen gas with intense ultraviolet radiation. This energy causes the nebula to glow a rich red in hydrogen-alpha light while also carving out a central cavity, giving the Rosette its characteristic hollowed appearance. Dark Bok globules and twisting dust lanes weave through the brighter regions, hinting at ongoing and future star formation.

To astrophotographers, the Rosette Nebula is a winter showpiece—striking in both broadband and narrowband imaging. Its combination of soft, flowing structure and dramatic contrast between light and shadow makes it a favorite target, revealing the delicate balance between stellar creation and the forces that slowly erode the clouds that gave those stars life.

Technical Details

Telescope: Sky-Watcher Esprit 100ED Refractor

Auto Focus: ZWO Electronic Auto Focuser

Astronomy Camera: ZWO ASI183MC Pro

Filter: Optolong UV-IR  cut filter; 120 exposures @ 60 seconds each (2 hours) — Palm Springs, CA

Filter: Antlia ALP-T Dual Narrowband Ha/Oiii Filter; 72 exposures @ 5 minutes each (6 hours)

Total Integration Time: 8 hours

Auto Guiding: William Optics Uniguide 50mm Guide Scope

Auto Guiding Camera: ZWO ASI120MM Mini Guide Camera

Auto Guiding Software: PHD2

Telescope Mount: Celestron CGX Equatorial Mount

Telescope Computer: BeeLink GK-55 Mini PC / Windows 10 Pro

Wireless Communication: GL-iNEt Beryl Travel Router

Telescope Control & Image Capture Software: Nighttime Imaging ‘N’ Astronomy (N.I.N.A.)

Image Integration Software: Astro Pixel Process, by Aries Productions

Image Post Processing Software:  PixInsight, by Pleiades Astrophoto

Images captured:

Palm Springs, CA during February 2022. Dark sky classification = Bright suburban sky (Bortle 6)

CLICK ON IMAGE TO VIEW A HIGH RESOLUTION VERSION

The Rosette Nebula is a vast and beautifully intricate cloud of glowing gas and dark dust located about 5,000 light-years away in the constellation Monoceros. Spanning roughly 130 light-years across, this immense emission nebula resembles the layered petals of a cosmic rose, with delicate arcs and filaments sculpted by powerful stellar forces.

At its heart lies the young open star cluster NGC 2244, whose hot, massive stars flood the surrounding hydrogen gas with intense ultraviolet radiation. This energy causes the nebula to glow a rich red in hydrogen-alpha light while also carving out a central cavity, giving the Rosette its characteristic hollowed appearance. Dark Bok globules and twisting dust lanes weave through the brighter regions, hinting at ongoing and future star formation.

To astrophotographers, the Rosette Nebula is a winter showpiece—striking in both broadband and narrowband imaging. Its combination of soft, flowing structure and dramatic contrast between light and shadow makes it a favorite target, revealing the delicate balance between stellar creation and the forces that slowly erode the clouds that gave those stars life.

Technical Details

Telescope: Sky-Watcher Esprit 100ED Refractor

Auto Focus: ZWO Electronic Auto Focuser

Astronomy Camera: ZWO ASI071MC Pro

Filter: Optolong UV-IR  cut filter; 222 exposures @ 60 seconds each (3.7 hours)

Filter: Optolong Lenhance Dual Narrowband Ha/Oiii Filter; 226 exposures @ 5 minutes each (18 hours)

Total Integration Time: 21.7 hours

Auto Guiding: William Optics Uniguide 50mm Guide Scope

Auto Guiding Camera: ZWO ASI120MM Mini Guide Camera

Auto Guiding Software: PHD2

Telescope Mount: Sky- Watcher EQ6-R Pro

Telescope Computer: BeeLink GK-55 Mini PC / Windows 10 Pro

Wireless Communication: GL-iNEt Beryl Travel Router

Telescope Control & Image Capture Software: Nighttime Imaging ‘N’ Astronomy (N.I.N.A.)

Image Integration Software: Astro Pixel Process, by Aries Productions

Image Post Processing Software:  PixInsight, by Pleiades Astrophoto

Images captured:

Palm Springs, CA during January  2022. Dark sky classification = Bright suburban sky (Bortle 6)

CLICK ON IMAGE TO VIEW A HIGH RESOLUTION VERSION

Abell 85, commonly known as the Garlic Nebula, is a faint and expansive planetary nebula drifting through the constellation Sagitta. Its whimsical nickname comes from its irregular, bulbous shape, which—when revealed through long-exposure imaging—resembles a clove of garlic floating against the star-filled background of the Milky Way.

Formed from the outer layers of a dying Sun-like star, Abell 85 represents a late and delicate stage of stellar evolution. The nebula’s ghostly shell glows subtly in hydrogen and oxygen emission, making it a challenging but rewarding target for astrophotographers. Wispy filaments and uneven arcs hint at complex mass loss and interactions with the surrounding interstellar medium as the nebula slowly disperses into space.

At its center lies a faint white dwarf—the exposed core of the original star—quietly cooling after shedding its atmosphere. Abell 85’s low surface brightness and large apparent size give it an ethereal presence, reminding us that even modest stars leave behind intricate and beautiful remnants as they reach the end of their lives.

Technical Details

Telescope: Sky-Watcher Esprit 100ED Refractor

Auto Focus: ZWO Electronic Auto Focuser

Astronomy Camera: ZWO ASI071MC Pro

Filter: Optolong UV-IR  cut filter; 420 exposures @ 60 seconds each (7 hours)

Filter: Antlia ALP-T Dual Narrowband Ha/Oiii Filter; 300 exposures @ 5 minutes each (25 hours)

Total Integration Time: 32 hours

Auto Guiding: William Optics Uniguide 50mm Guide Scope

Auto Guiding Camera: ZWO ASI120MM Mini Guide Camera

Auto Guiding Software: PHD2

Telescope Mount: Sky- Watcher EQ6-R Pro

Telescope Computer: BeeLink GK-55 Mini PC / Windows 10 Pro

Wireless Communication: GL-iNEt Beryl Travel Router

Telescope Control & Image Capture Software: Nighttime Imaging ‘N’ Astronomy (N.I.N.A.)

Image Integration Software: Astro Pixel Process, by Aries Productions

Image Post Processing Software:  PixInsight, by Pleiades Astrophoto

Images captured:

Palm Springs, CA during October 2024. Dark sky classification = Bright suburban sky (Bortle 6)

CLICK ON IMAGE TO VIEW A HIGH RESOLUTION VERSION

The Horsehead Nebula is one of the most recognizable and iconic dark nebulae in the night sky. Located in the constellation Orion, it lies about 1,300 light-years from Earth and forms part of the vast Orion Molecular Cloud Complex, a region rich in gas, dust, and active star formation.

Seen in silhouette against the glowing red hydrogen gas of the background nebula IC 434, the Horsehead’s distinctive shape—resembling a horse’s head and neck—comes from dense, cold clouds of dust that block visible light. This dust is the raw material for future stars, slowly sculpted by radiation and stellar winds from nearby young, massive stars.

Although visually striking in long-exposure astrophotography, the Horsehead Nebula is extremely faint to observe visually and requires dark skies and specialized filters. Over time, the intense ultraviolet radiation from nearby stars is eroding the nebula, gradually reshaping its form on cosmic timescales.

Both scientifically important and visually dramatic, the Horsehead Nebula stands as a classic example of how light and shadow reveal the dynamic processes of star birth within our galaxy.

Technical Details

Telescope: Sky-Watcher Esprit 100ED Refractor

Auto Focus: ZWO Electronic Auto Focuser

Astronomy Camera: ZWO ASI071MC Pro

Filter: Optolong UV-IR  cut filter; 400 exposures @ 60 seconds each (6.66 hours)

Filter: Optolong Lenhance Dual Narrowband Ha/Oiii Filter; 132 exposures @ 5 minutes each (11 hours)

Total Integration Time: 17.66hours

Auto Guiding: William Optics Uniguide 50mm Guide Scope

Auto Guiding Camera: ZWO ASI120MM Mini Guide Camera

Auto Guiding Software: PHD2

Telescope Mount: Sky- Watcher EQ6-R Pro

Telescope Computer: BeeLink GK-55 Mini PC / Windows 10 Pro

Wireless Communication: GL-iNEt Beryl Travel Router

Telescope Control & Image Capture Software: Nighttime Imaging ‘N’ Astronomy (N.I.N.A.)

Image Integration Software: Astro Pixel Process, by Aries Productions

Image Post Processing Software:  PixInsight, by Pleiades Astrophoto

Images captured:

Palm Springs, CA during November 2021. Dark sky classification = Bright suburban sky (Bortle 6)

Deep Sky Object Catalogs

Each image is described by it catalogue identification. Most are named after an astronomer who identified and catalogued the target. Some targets are found in more than one catalogue. Below are the most common:

• Caldwell (list compiled by Sir Patrick Moore)
• IC (The Index Catalog)
• M or Messier (list compiled by Charles Messier)
• NGC (New General Catalog)
• SH (list Compiled by Stewart Sharpless)
• VdB or VDB (compiled by Sidney van den Bergh)

Click on any image below to view a full image and technical details about the deep sky object