Deep Sky / Long Exposure Photography

NGC7293, The Helix Nebula in Aquarius

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This is my final photo from GSSP 2010. This is 4h total exposure, twelve 20m subframes, shot with Cassie/350D.

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Deep Sky / Long Exposure Photography

NGC6888, The Crescent Nebula in Cygnus

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I shot this on the final night of GSSP 2010. This is 1h total exposure, three 20m subframes, shot with Cassie/350D.

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Deep Sky / Long Exposure Photography

B27, The Snake Nebula in Scorpius

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I shot this on the final night of GSSP 2010. This is a single 10m subframe, shot with Cassie/350D. Scope was pointed East at the time.

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Deep Sky / Long Exposure Photography

NGC7331, Spiral Galaxy in Pegasus

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I shot this on the third night of GSSP 2010. This is 2h total exposure, six 20m subframes, shot with Cassie/350D. Scope was pointed East at the time.

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Deep Sky / Long Exposure Photography

NGC6820, Emission Nebula in Cygnus

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I shot this on the third night of GSSP 2010. This is 40m total exposure, two 20m subframes, shot with Cassie/350D. Scope was pointed West at the time.

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Deep Sky / Long Exposure Photography

B27, The Snake Nebula in Scorpius

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I shot this on the third night of GSSP 2010. This is a single 20m subframe, shot with Cassie/350D. Scope was pointed West at the time. When this frame trailed so badly, […]

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Deep Sky / Long Exposure Photography

M16, The Eagle Nebula in Sagittarius

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I shot this on the third night of GSSP 2010. This is 1h 20m total exposure, four 20m subframes, shot with Cassie/350D. Scope was pointed West at the time.

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Deep Sky / Long Exposure Photography

M20, The Trifid Nebula in Sagittarius

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I shot this on the third night of GSSP 2010. This is 1h 20m total exposure, four 20m subframes, shot with Cassie/350D. Scope was pointed West at the time.

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Deep Sky / Long Exposure Photography

IC1848, The Soul Nebula

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I shot this on the second night of GSSP 2010. This is 2h total exposure, six 20m subframes, shot with Pumpkin/350D.

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Deep Sky / Long Exposure Photography

M33, The Great Triangulum Galaxy

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I shot this on the second night of GSSP 2010. This is 1h total exposure, three 20m subframes, shot with Pumpkin/350D.

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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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