MOST RECENT
Uncategorized
RE: Focus depth: Canon vs. Nikon
Hi Jimbo – Glad to hear from you again! It sounds like you are now tinkering into deeper waters. 🙂 Here are the backfocus distances: SBIG ST-4 1.16mm Meade DSI 7.43 Canon […]
star clock (sidereal time)
http://physics.lakeheadu.ca/courses/Astro/2310/sidereal/sidereal.htm
O'erheard
Pompous failed astronomer: So, the reason there was a half moon last night was that the Earth gets in between the sun and the moon [arranges water bottles to demonstrate]. It’s kind […]
Uncategorized
Re: ST-4 question
Hi Jimbo, Hmm, it’s been a long time since I had the ST4 connected to the PC. I do recall that it worked OK with the CCDSoft program supplied by Bisque. But […]
Deep Sky / Long Exposure Photography / Observing Reports
RE: A rare clear night in January
Very pretty horse head nebula! Thanks for sharing. M —–Original Message—– From: Jimbo S. Harris Sent: Sunday, January 13, 2008 9:30 AM Subject: A rare clear night in January Hi all, It […]
Deep Sky / Gear / Long Exposure Photography
B33, The Horsehead Nebula in Orion
A second clear night in a row gave me a shot at getting a full 2 hours of B33. The sky background sure isn’t dark. The moon was a little bright tonight, […]
Deep Sky / Gear / Long Exposure Photography
NGC 2244, The Rosette Nebula in Monoceros
Finally, a halfway-decent shot of The Rosette Nebula. This object could have been shoehorned into the FOV a little better, and of course would have been a snap in Pumpkin. But Veronica […]
Deep Sky / Gear / Long Exposure Photography
B33, The Horsehead Nebula in Orion
A rare clear night during January. This was shot perhaps a bit too late at night. I did 2 hours on (what I thought was) The Rosette, see that image for details. […]
RECENT UPDATE
Polar Alignment Calculations
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 […]
Gear / Observatory / Telescope
Special Guest Star takes the mount at Hilltop O
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 […]
General / Maintenance / Observatory
Dome shutter is motorized again!
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 […]
Trixie 2017 – tube mods
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 […]
MOST COMMENTED
Observatory
Observatory 2.0 – Time has come today!
General / Maintenance
First Light, a deeper look
Mount / Observatory / Telescope
Observatory 2.0 – Result!
Observatory
Observatory 2.0 – The Pier goes in
Gear / General / Maintenance
Martin Farmer Wormblock installation notes
Deep Sky / Long Exposure Photography
NGC2244, The Rosette Nebula
Deep Sky / Long Exposure Photography
Another beautiful night.