Mar 17

M51 Whirlpool Galaxy

Date: Mar 17, 2017 Categories: Deep Sky Objects Galaxies Comments:0

M51 Whirlpool Galaxy, 23 million LY estimated distance, 60’000 LY diameter.

Cropped image.

f/5.6

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star-watcher on Measuring Periodic Error: “Hi Fred Many thanks for your inputs. I’ve updated the page with your maths. But I used my best achieved…” Oct 3, 17:12

Fred on Measuring Periodic Error: “Note that giving a periodic error in arcsec/min is non sense. The periodic error is not a linear line, but…” Sep 30, 17:14

star-watcher on Lunar Eclipse 2018-07-27: “In short: Nothing special happened. I just stopped to shoot (for the moment). I simply needed a break 🙂 Also…” Sep 29, 18:11

Ole on Lunar Eclipse 2018-07-27: “No activity here lately. What happened?” Sep 21, 00:24

star-watcher on Lacerta MGEN II Auto Guider: “Thank you very much 🙂” Sep 18, 01:03

star-watcher on Lacerta MGEN II Auto Guider: “Hi Franz Thats a good question… at the moment I’ve no idea what could be the reason. Maybe a factory…” Sep 16, 22:00

Marcus on Lacerta MGEN II Auto Guider: “Your Blog is superb (as are your pictures)! Bravo and thanks for the vast amount of good and useful information…” Sep 13, 17:52

Franz on Lacerta MGEN II Auto Guider: “Hey Karol, I have the exact same setup as shown in your blog. Everything went fine for a couple of…” Sep 10, 21:54

Jesse D Beatty on DSO Browser: “Glad to have found this site. Getting back into astrophotography after a twenty-five year hiatus. Now retired and have the…” Aug 5, 16:12

M51 Whirlpool Galaxy

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