Category: General
Astro knowledge / Solar System Photography
Analemma
This is an overview of my desktop analemma (in progress). The pushpins in the wall are just what I do with extra pins when I’m bored. (: (I used a red one […]
Astro knowledge / Solar System Photography
Analemma
This is a detail of how quickly the shadow of the gnomon moves. The lens cap was not moved. The rightmost piece of tape in the upper images is the one detailed […]
Deep Sky / Long Exposure Photography / Observing Reports
Re: Ad Astra Observatory photo updates
Hi Jimbo, I liked the dark horse image in particular. Looks good. Alex On Aug 7, 2006, at 11:58 AM, Jimbo S. Harris wrote: > Hi all, > > Now that the […]
Astro knowledge / Deep Sky / Gear / Long Exposure Photography / Optics
M27, The Dumbbell Nebula in Vulpecula
It was this image that convinced me that I needed to do the filterectomy on the Nikon D70. According to S&T, The Dumbbell, The Coathanger, and Albireo form an equilateral triangle.
Maintenance / Observatory / Observing Reports
Re: Ad Astra Observatory now accepting photons
Looking good. D — “Jimbo S. Harris” <jimbo@jimbo.net> wrote: > I thought the Build Team should get the first look > at the output of the > fully functional Ad Astra Observatory […]
dec slop
TRICKS TO SOLVE THE DEC GEAR SLOP/SLOW MOTOR PROBLEMS: DEC axis steps: 1)Before going any further, refer to Mike Dodd’s excellent article over on the CGE group in his folder on Autoguiding […]
backlash correction
There are two adjustments you can make on each axis to minimize backlash, the play in the worm mount and the meshing of the worm to the axis gear. The worms on […]
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.