M 101

Posted: May 5th, 2025

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Technical Info

Telescope/Lens: SharpStar 61EDPH II + 0.8x reducer

Camera: ZWO ASI533MM Pro

Mount: Umi 17 Lite

Guide Scope: OAG

Guide Camera: ZWO ASI 120mm

Software: N.I.N.A., Siril, Seti Astro suite, Adobe Photoshop

Accessories: Mele mini PC, ZWO EFW, ZWO EAF

Exposure:

73 x 120" ISO/Gain: 100 - L

80 x 120" ISO/Gain: 100 - R

81 x 120" ISO/Gain: 100 - G

84 x 120" ISO/Gain: 100 - B

Yellow zoneLight Pollution:

Lipeck, Russia

May 2nd, 2025

10 h 36 m

682

11

An incredible number of satellites pass in the vicinity of M101. Often, 4-5 trails were recorded during the exposure. Thanks, Elon! (no).

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Resolution: 4748x4748 px

Scale: 8742 KB

62

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Comments

It can be even larger, but I don't remove such single stars; the processing isn't affected.

6 May, 2025 Reply

Lxkor Replied to Ryjov Aleksey

I removed about 10 frames with the most prominent trails. When I was shooting M81, there were far fewer trails, but here almost every other exposure had at least 1-2 trails. And this was just a 2-minute exposure—with a longer one, you could easily draw a Star of David.

6 May, 2025 Reply

Ryjov Aleksey Replied to Lxkor

Just unlucky, I guess. Hit right at the peak hour.

6 May, 2025 Reply

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