Deep Sky / Long Exposure Photography

M106, Spiral Galaxy in Ursa Major

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I got Cassie back on the mount, and now my target selection has totally changed. All the tolerances need to be a little tighter with the longer focal length, so I decided […]

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Deep Sky / Long Exposure Photography

OK, I need to stop shooting 5m subframes.

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I decided to go after The Owl Nebula, as I’ve only gotten one shot of it previously, despite years of hunting in Ursa Major. So I caught half an hour of it, […]

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Techniques

Polar Alignment Calculations

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Here’s a page that derives Polar Alignment Calculations. (update 5/2020: the original site is gone, so I found the text on Wayback and am inserting it below. This is by the original […]

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Gear / Observatory / Telescope

Special Guest Star takes the mount at Hilltop O

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The Astro Jedi needed somewhere to store his light sab—- I mean, bucket, and I was only too happy to accommodate him. I have decided that I need to come to a […]

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General / Maintenance / Observatory

Dome shutter is motorized again!

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I finally decided to bite the bullet and fix the shutter motor. Things went sideways last winter, and I’ve been opening the shutter manually (and tying it shut with rope, so we […]

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ATM

Trixie 2017 – tube mods

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I finally got around to cutting the MTA-UTA tubes to length; the only eyepiece that would come to focus with the focuser spacer in place is the Televue 55mm Plossl. If I […]

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