ARCHIVE March2008
LCD test patterns
http://www.lagom.nl/lcd-test/
Uncategorized
Re: Gemini Stepper Interface
Well, answer is I don’t know. It depends on a lot of things, not the least of which is the step angle of the motor that Moonlite uses, and the gearing of […]
geosync satellite declination
=-ATAN((6378 * SIN(A3 * PI() / 180)) / (42164 – 6378 * COS(A3 * PI() / 180))) * 180 / PI() where A3 = latitude. with 37.528… (Newark, CA), Dec = -5.9775 […]
Uncategorized
Re: Gemini Stepper Interface
Oh. Yes. It should just plug right to your existing motor. James —– Original Message —– From: “Jimbo S. Harris” <jimbo@jimbo.net> To: “James Lacey” <james.lacey@lazyfocus.com> Sent: Thursday, March 20, 2008 10:27 AM […]
Re: Auto Guiding
At 09:33 AM 3/17/2008 -0700, you wrote: >On Mar 17, 2008, at 8:51 AM, Jimbo S. Harris wrote: >>>My money, if I had any, would have burst into flame by now at […]
Deep Sky / Gear / Long Exposure Photography
M104, The Sombrero Galaxy in Virgo
Finally! A Virgo galaxy. I’ve had some kind of mental block about shooting in Virgo, so I finally forced myself to shoot down here. M104 is on the edge of being too […]
Re: Machine name
Apparently I use ob-SKYUR-uh On Sat, Mar 8, 2008 at 11:20 AM, Jimbo S. Harris wrote: At 09:10 AM 3/8/2008 -0800, you wrote: >That’s not too bad.
Deep Sky / Gear / Long Exposure Photography
M81, Spiral Galaxy in Ursa Major
Like M42 is a “tester” object for winter, M81 is a tester object for the spring. It’s big and bright and there’s lots of detail to bring up. In addition, if well-framed, […]
Deep Sky / Gear / Long Exposure Photography
M82, Spiral Galaxy in Ursa Major
This is a “freebie” version of M82. It was way off in the badly vignetted border of the above M81 images (M81 was centered). But once I applied flat frames to the […]
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.