TAG FOV and other Calculation
siderealness, usno
http://aa.usno.navy.mil/faq/
more siderealness
http://home.att.net/~srschmitt/script_celestial2horizon.html#the%20source%20code
sidereal time calculator
where do all the constants come from? // test function test() { // Pleiades M45, 03h47.0m, +24�07′ // Boston, MA US 42�21′ N, 71�04′ W // UTC: 04/07/2004 01:00:00 // alt = […]
whatsup
http://www.whatsup.ricksastro.com/findex.htm
Astro knowledge / Deep Sky / Gear / Long Exposure Photography
NGC 7293, The Helix Nebula in Aquarius
I’ve been having trouble with my setting circles lately. But once I got them dialed in, this object was pretty easy to find and photograph. For some reason, the image appears slightly […]
Astro knowledge / Solar System Photography
Animation of Moon at 7 to 10 days
Moon at 7 to 10 days. Shot on 4 consecutive days from June 22 through June 25, 2007. Here’s what I have so far on my “all phases of the moon” project. […]
Deep Sky / Long Exposure Photography / Techniques
galaxies
I’ve found that imaging galaxies is tough because the objects are so tiny. A few thoughts. 1) See what happens if image size is set smaller. I assume it’s some kind of […]
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.