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M106 (NGC 4258) Canes Venatici

Ryjov Aleksey
2775065
Category:Deep Sky
Published:
1302
M106 (NGC 4258) Canes VenaticiNGC 4248NGC 4258
Resolution:
2371x1698 px
File size:
299 KB

Photo description / processing

I continue testing the wonderful Askar SQA 85 mm f/4.8. The galaxy M 106 was first discovered by Pierre Méchain on July 30, 1781, in the constellation Canes Venatici. The distance to the galaxy is about 24 million light-years. The diameter is 135,000 light-years. The angular size is 18.6'x7.2'.

Technical information

Telescope/Lens
Askar SQA 85
Camera
ZWO ASI 183 MC Pro
Mount
Ioptron HAE 29 C
Guide Scope
Askar 52mm F4
Guide Camera
ZWO ASI 120 MM mini
Software
SharpCap 4.0, DeepSkyStacker, Siril, Adobe Photoshop, GraXpert
Location
Петушки, Владимирская область, Россия

Light pollution

Orange, Bortle 6 zone

Date taken

Exposure

  • 79 × 300″ · ISO/Gain: 120 · Фильтр IR CUT ·

Total exposure: 6 h 35 m

Photo versions

M106 (NGC 4258) Canes Venatici
Updated
M106 (NGC 4258) Canes Venatici

Apr 13th, 2025

6 h 35 m

Revised in PixInsight by astrophotographer Anton (user Anth https://www.deepskyhosting.com/id1059), for which many thanks to him. Where can one get this miracle program? PixInsight unequivocally surpasses everything I have used.

M106 (NGC 4258) Canes Venatici
Current photo
M106 (NGC 4258) Canes Venatici

Apr 9th, 2025

6 h 35 m

I continue testing the wonderful Askar SQA 85 mm f/4.8. The galaxy M 106 was first discovered by Pierre Méchain on July 30, 1781, in the constellation Canes Venatici. The distance to the galaxy is about 24 million light-years. The diameter is 135,000 light-years. The angular size is 18.6'x7.2'.

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Current version

Comments

Anth
Comment on photo: M106 (NGC 4258) Canes Venaticifrom
Alexey, hello.
I also just got my first frames with this telescope.
Can you tell me what FWHM you get on single frames with the 2600 and the 183 camera?
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AnthReply to Ryjov Aleksey
Comment on photo: M106 (NGC 4258) Canes Venaticifrom
My name is Anton, nice to meet you )
FWHM is roughly a measure of star size in an image.
If you use the ASTAP program, you can select a specific file, choose the menu item Tools->Image Inspection, and then press F4.
First, you'll see a polygon showing the curvature across the field, and you can immediately tell if there is tilt in the sensor or not.
And second, the star sizes across the entire frame are visible.
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AnthReply to Ryjov Aleksey
Comment on photo: M106 (NGC 4258) Canes Venaticifrom
I made my own version of processing your original data for M106, please take a look. https://disk.yandex.ru/d/GY7s4iuKkbxMtA I also really like the telescope—great resolution, and color is easy to extract from the raw data. I do notice a bit of spherical aberration in the stars—they look a little fluffy; I’d prefer a bit less of that effect. But you can always find a flaw in any telescope; this is more about wanting to achieve that unattainable perfect quality.
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Ryjov AlekseyReply to Anth
Comment on photo: M106 (NGC 4258) Canes Venaticifrom
Thanks, Anton! The processing is superb, I can't do it like that. Can I post it if you don't mind? I also need to switch to PixInsight, but I don't have the opportunity right now. Also, your photos aren't showing up in the feed—check your settings on deepskyhosting. I'm liking them, but they don't appear in the feed. Thanks again and clear skies. Always happy to chat with you!
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