Category: Techniques
Solar System Photography / Techniques
Re: Saturn + new camera
Art Morton wrote: > The three below are from the new camera, not set up correctly, and > they are bad. The do show potential. These are good “proof of concept” shots. […]
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 […]
star clock (sidereal time)
http://physics.lakeheadu.ca/courses/Astro/2310/sidereal/sidereal.htm
Long Exposure Photography / Techniques / Technology
Re: Narrowband with DSLR
>I keep making attempts at narrowband imaging, but I haven’t been able to >make it stick yet; one downside to a DSLR is that you need 2” accessories, >and finding a filter […]
Re: ASTROMART – Response to ad #520603
In a message dated 9/13/2007 8:13:27 P.M. Central Daylight Time, astromart@jimbo.net writes: Hi Ron, A Stiletto will definitely help you to find focus if you’re using a telescope. I did not find […]
siderealness, usno
http://aa.usno.navy.mil/faq/
more siderealness
http://home.att.net/~srschmitt/script_celestial2horizon.html#the%20source%20code
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.