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Deep Sky Detail (Mark)

@deepskydetail.bsky.social

Plays an amateur astronomer on YouTube. Has fun with astronomy in real life. Trained in cognitive science. Also likes other things! https://www.youtube.com/@deepskydetail

107 Followers  |  112 Following  |  120 Posts  |  Joined: 23.01.2025
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Posts by Deep Sky Detail (Mark) (@deepskydetail.bsky.social)

And it points out that many imaging acquisition software have histograms that may not be all that useful. For example, the one in Ekos/Kstars shows "intensity" and not "ADU," which makes it really hard to know if you are clipped on the left. Anyway, watch the video. I think it's good :)

01.03.2026 01:13 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

If you're looking to minimize satellite trails, planes, guiding errors etc., then you do want shorter sub frames. But, how short can you go? Well, use the histogram to find out! The video goes into detail about the method and tools you can use to analyze your sub frame histograms.

01.03.2026 01:13 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

And while it is true that you don't have to pay attention to it, it can still provide valuable information. You can use it to figure out whether your sub-frames are too short. With CMOS cameras and low read noise, sub frames can be very short. But too short is bad.

01.03.2026 01:13 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
How to Tell If Your Sub Exposures Are Long Enough. #astrophotography
YouTube video by Deep Sky Detail How to Tell If Your Sub Exposures Are Long Enough. #astrophotography

Histograms, despite what you may have heard, can still be used to figure out what a good sub-exposure time is in #astrophotography. There is an argument I've heard that you don't need to pay attention to the left side of the histogram anymore...

youtu.be/jVGcG989g9E

01.03.2026 01:13 β€” πŸ‘ 4    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
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I've been messing around with adding low frequency data from my f/2.9 sharpstar to data taken with my f/9 RC for Messier 78 in Gimp using wavelets. I'm not sure what to think, but I kind of like it. What do you think?
#astrophotography @kat-astro-bot.bsky.social

13.02.2026 22:04 β€” πŸ‘ 18    πŸ” 3    πŸ’¬ 2    πŸ“Œ 0
Two Times the Detail in Half the Time? What is detail anyway?
YouTube video by Deep Sky Detail Two Times the Detail in Half the Time? What is detail anyway?

I did a quick video comparing two pictures I took of M78. One had 12 hours of data, the other had 23 hours. The 12 hour image had much better SNR. But it lacks something! #astrophotography

youtu.be/3wR8A2T7XEM

10.02.2026 21:23 β€” πŸ‘ 5    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Thank you! :)

06.02.2026 19:27 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
You are being misled about renewable energy technology.
YouTube video by Technology Connections You are being misled about renewable energy technology.

Let's do this.

www.youtube.com/watch?v=KtQ9...

30.01.2026 17:27 β€” πŸ‘ 10774    πŸ” 3536    πŸ’¬ 671    πŸ“Œ 726

I also did some additional light pollution analyses for my BuyMeAcoffee Members: buymeacoffee.com/deepskydetail/filters-light-pollution-12nm-vs-5nm

31.01.2026 02:37 β€” πŸ‘ 2    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
Testing 5nm vs 12nm Narrowband Filters. An Experiment in Bortle 6 Skies
YouTube video by Deep Sky Detail Testing 5nm vs 12nm Narrowband Filters. An Experiment in Bortle 6 Skies

Have you ever wondered just how much bandwidth matters? Like, how much more integration time would you need to get the same SNR with a 12nm narrowband filter vs. a 5nm filter? Well, I tested that in my Bortle 6 skies! #astrophotography

youtu.be/U9lwAT1ECk0

31.01.2026 02:36 β€” πŸ‘ 9    πŸ” 1    πŸ’¬ 1    πŸ“Œ 1
Simple Jupiter Processing: Tutorial with Free Software (Autostakkert + Gimp)
YouTube video by Deep Sky Detail Simple Jupiter Processing: Tutorial with Free Software (Autostakkert + Gimp)

I made a video about how you can process #Jupiter in Autostakkert and Gimp. #astrophotography

youtu.be/C1aOxJOEBjg

19.01.2026 15:04 β€” πŸ‘ 4    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Jupiter in Opposition πŸ“ΈπŸ”­

13.01.2026 02:32 β€” πŸ‘ 48    πŸ” 6    πŸ’¬ 0    πŸ“Œ 0
Seeing Jupiter's Rotation in my #telescope.  #astrophotography #science #space #astronomy #Jupiter
YouTube video by Deep Sky Detail Seeing Jupiter's Rotation in my #telescope. #astrophotography #science #space #astronomy #Jupiter

I made a little YT Short detailing how I created Jupiter's rotation:

youtube.com/shorts/ZrbU2...

#astrophotography

11.01.2026 05:46 β€” πŸ‘ 2    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0

Thank you!

10.01.2026 20:32 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Note: 10:00PM is frame 40. 1:30AM is frame 0.

10.01.2026 04:55 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Here is a timelapse of 40 images of #Jupiter taken with my C8 and 224MC camera from last night. The frames are on the bottom. I started around 10PM and ended around 1:30AM, right after the Big Red Spot's transition. The frame is given in the text. #astrophotography

10.01.2026 04:51 β€” πŸ‘ 39    πŸ” 2    πŸ’¬ 2    πŸ“Œ 1
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I have the same bug as Autostakkert. Highlighted in the pic below.

10.01.2026 02:37 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Here is another image of #Jupiter from last night. #Astrophotography. Slowly working on a timelapse. Autostakkert is chugging away in the background!

09.01.2026 22:54 β€” πŸ‘ 32    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

That looks amazing!!

09.01.2026 06:19 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 1    πŸ“Œ 0

Looks great!

09.01.2026 05:48 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 1    πŸ“Œ 0

Thanks, Doug! :)

09.01.2026 06:23 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Thank you!

09.01.2026 05:48 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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I am taking a series of Jupiter shots tonight with my C8 with an inexpensive 2x barlow. This is an initial process of one of my first videos. Camera is ZWO 224MC. Hopefully, I can get a nice timelapse. #astrophotography

09.01.2026 05:46 β€” πŸ‘ 38    πŸ” 1    πŸ’¬ 3    πŸ“Œ 0

That looks great, imo! I love how you brought out the HH objects on the bottom and the color is perfect.

It's such a difficult object to process. When you add light pollution on top of it, it always takes me forever to process and I'm never satisfied. I feel like I end up overprocessing things.

05.01.2026 22:48 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
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I like imaging M78, but I'm never really satisfied with it. This is 14 hours of data (11 L, 3 RGB) using my 294MM pro and Sharpstar 130-HNTAL from Bortle 6/7. It's as decent a shot as I have ever got, but light pollution really holds it back, imo. #astrophotography @kat-astro-bot.bsky.social

05.01.2026 21:06 β€” πŸ‘ 34    πŸ” 6    πŸ’¬ 2    πŸ“Œ 0
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Around 10 hours (8 in L, 2 RGB) of the Pleiades, shot with my 294MM and 130 hyperbolic Newtonian in Bortle 6/7 skies. #astrophotography @kat-astro-bot.bsky.social

05.01.2026 02:49 β€” πŸ‘ 41    πŸ” 6    πŸ’¬ 1    πŸ“Œ 0
It only cost me $35. DIY Spectrograph. #astrophotography #filters
YouTube video by Deep Sky Detail It only cost me $35. DIY Spectrograph. #astrophotography #filters

I made a spectrograph to see if I can test my #astrophotography filters. How good is it? Hint: there are probably tweaks I can do to make it better. Video out now.

youtu.be/6EeD9ejpDzY

03.01.2026 23:35 β€” πŸ‘ 7    πŸ” 2    πŸ’¬ 2    πŸ“Œ 0
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New video coming out tomorrow :)

03.01.2026 03:23 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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This is comet 3I/ATLAS imaged from my Backyard early Saturday morning. The timelapse is about 150 mins worth of 60s exposures. It's moving FAST! I hit some branches but kept shooting until it came out the other side.

Perigee is on Friday!

#astronomy #astrophotography #comet #3iAtlas

14.12.2025 19:59 β€” πŸ‘ 444    πŸ” 68    πŸ’¬ 12    πŸ“Œ 2
3I/ATLAS Is Here Today, What Happens Next?
YouTube video by Naztronomy 3I/ATLAS Is Here Today, What Happens Next?

Comet 3I/ATLAS is at Perigee today. Made a video discussing God/Aliens of the Gaps and debunking some of the theories spread (mostly by a certain individual).

www.youtube.com/watch?v=3Zv4...

#astronomy #comet #3iatlas

19.12.2025 13:33 β€” πŸ‘ 11    πŸ” 3    πŸ’¬ 4    πŸ“Œ 1