What You Will Learn
In this post I share my February 2026 DWARF 3 image of M78 nebula (aka the friendly ghost nebula), a reflection nebula in Orion. I cover what makes M78 different from the bright emission nebulae most people associate with astrophotography, how the session went under a Bortle 6 suburban sky with moonrise partway through, why the Astro filter is the right choice for this kind of target, and what I noticed about Barnard’s Loop in the wider field.
In February, I captured M78 in Orion with my DWARF 3 and submitted the image for an astrophotography competition. It was not shortlisted, which means I can finally share it here. And even though it did not make the final cut, this image remains one of my favorite kinds of astrophotography: quiet, subtle, and full of story.
Run Card
| Date | February 2026 |
| Location | Massachusetts area |
| Sky | Bortle 6 (suburban) |
| Telescope | DwarfLab DWARF 3 |
| Mode | EQ / Deep Sky |
| Filter | Astro |
| Exposure | 30 seconds |
| Gain | 60 |
| Frames | ~360 |
| Integration | ~3 hours |
| Session | 18:57 to 22:26 |
| Temperature | ~39°F |
| Moon | Rose ~20:25 |
What M78 Is
M78 is a reflection nebula in the constellation Orion. It sits within the larger Orion Molecular Cloud complex, one of the most active star-forming regions near Earth, but it is easy to overlook next to the famous bright targets in the same region.
Most people associate Orion with dramatic red emission nebulae. The Orion Nebula (M42) dominates wide-field views. The Horsehead Nebula has become iconic. The Flame Nebula and the Rosette Nebula are visually striking even in short integrations.
M78 is different. It is not an emission nebula. Its gas is not being ionized by hot stars. It is a reflection nebula, meaning it shines because dust is scattering and reflecting the light of nearby stars. Without that illumination, the dust would be almost invisible.
That makes M78 visually quieter than many popular targets. The central glow is blue and soft. The surrounding regions are dark, not empty, but filled with dust that absorbs and shapes the light passing through it.
Borrowed Light
M78 does not generate its own light.
What you see when you look at this image is borrowed. Nearby stars illuminate dust that would otherwise remain invisible in the dark of Orion. The blue color comes from the way dust scatters light. Shorter blue wavelengths scatter more efficiently than longer red ones, which is conceptually similar to why Earth’s daytime sky appears blue, even though the physical environment here is completely different.
The surrounding darkness is not empty space. It is dust blocking and shaping the light. In astrophotography, it is tempting to think of the bright regions as the subject and the dark regions as background. In an image like this, the darkness is part of the subject. It defines the edges of what is visible. It tells you where the dust is thick enough to absorb light rather than scatter it.
That is what I wanted to capture: not a bright dramatic object blazing across the frame, but something quieter. A small patch of Orion made visible only because light from other stars happened to pass through it in the right direction.
The Capture
I ran the session from approximately 18:57 to 22:26, which gave me a window of about 3.5 hours. The Moon rose around 20:25, so roughly the first 1.5 hours of the session had the cleaner, darker sky. After moonrise the contrast dropped, but the session continued accumulating frames.
The total stack used approximately 360 frames at 30 seconds each, for around 3 hours of total integration. I used EQ mode with the Astro filter and a gain setting of 60. The temperature was around 39°F, which is typical for February in Massachusetts and generally good for the sensor running cooler.
The Astro filter was the right choice for this target. M78 is a broadband reflection nebula. A narrowband or duo-band filter, which would isolate hydrogen-alpha or oxygen-III emission, would not help here because M78 is not producing significant emission signal. The Astro filter preserves the broadband color response that a reflection nebula needs.
The challenge with a target like this under a Bortle 6 sky is that the dust detail is low contrast. Reflection nebulosity does not have the strong signal punch of a bright emission nebula. Moonlight further reduced contrast in the later frames. Processing had to reveal the faint outer dust without crushing the background or over-brightening the core.
Barnard’s Loop
One of my favorite details in the image is something easy to miss: a faint red arc visible in the wider field.
That arc is part of Barnard’s Loop, a large arc of emission nebulosity that wraps around much of the Orion complex. It is associated with the larger molecular cloud and likely traces the effects of stellar winds and old supernova activity in the region.
Its presence in the image changes how M78 feels. Without it, M78 looks like an isolated blue patch floating in dark space. With it, the image shows M78 as part of something much larger. A small lantern inside a much bigger structure of gas, dust, stars, and ongoing star formation.
The Competition, and Why It Did Not Matter
Astrophotography competitions draw incredible submissions with much larger apertures, darker skies, and more hours of integration. A DWARF 3 session from a suburban backyard is competing in a different league. I knew that going in and the image was not selected, and that is fine.
What the submission gave me was a reason to finish the image carefully. It pushed me to work through the processing properly instead of calling it done at the first passable result. Whatever the outcome, that effort was worth it.
And the image is still one I like. Not because it is technically exceptional, but because it captured something I was trying to say. Some images are worth sharing because they are dramatic. Some are worth sharing because they reveal something quiet.
Closing
This is M78: not a nebula blazing with its own light, but dust made visible by the light of others.
Borrowed light, crossing space, collected three hours at a time from a backyard in Massachusetts.
That is still worth something.
Clear skies,
AK
What is M78?
M78 is a reflection nebula in the constellation Orion. It appears blue because dust reflects and scatters light from nearby stars rather than generating its own light through ionization.
Why is M78 blue?
The blue color comes from starlight scattering off fine dust particles. Shorter blue wavelengths scatter more efficiently than longer red wavelengths, which is the same physical principle behind why Earth’s daytime sky appears blue.
Can the DWARF 3 capture M78?
Yes. The DWARF 3 can capture M78 in EQ / Deep Sky mode with enough integration time. M78 is a subtle target, so longer total exposure helps reveal the faint dust structure and outer reflection nebulosity.
What filter works best for M78 with the DWARF 3?
The Astro filter is the better choice for M78. Because M78 is primarily a broadband reflection nebula rather than an emission nebula, a narrowband or duo-band filter would not help and could actually reduce the signal from the reflective dust.
What is the red arc near M78?
The faint red arc visible in the wider field is part of Barnard’s Loop, a large emission structure associated with the Orion Molecular Cloud complex. Its presence in the image shows that M78 is not isolated but part of a much larger region of gas, dust, and star-forming activity in Orion.
Why did the Moon affect the session?
The Moon rose around 20:25 during the session. Moonlight adds background brightness to the sky, which reduces contrast and makes faint, low-surface-brightness targets like reflection nebulae harder to separate from the sky background. The first portion of the session before moonrise likely produced the cleanest individual frames.
Leave a Reply