Stellar Products Image Gallery

Updated June 10, 2012.

Each photo is described in detail, including exposures, equipment used, dates, and processing. All of the 2000-2003 images used a 10" Newtonian telescope with the AO-2 to project the image to the SBIG ST-7 camera and CFW-8 filter wheel. The effective focal length is 14.1 m, giving a plate scale of about 7.6 pixels per arcsecond (3.8 pixels/arcsec in 2x binned mode). This is slightly over F/60, so even the central core of the Airy disk is spread over 4 pixels.

For Mars, starting in 2003, a Philips ToUcam webcam is used at F/33 to get some great images. Focusing is easier, and the noise level on raw frames is much less than I expected. Automatic selection of the best 100 frames, and automatic registration, seems very good. I tested the ToUcam to measure its actual exposure time, linearity, and spectral response.

Starting 2005, a 16 in telescope is used.

The narrative for each image is variable - I'm treating this website as my long-term notebook. Things that went well, as well as things that went wrong, and changes to my telescope or techniques are all included in the following pages and images.




Mars - the 2001 global dust storm, 2003 images with a webcam and 2005 images with a 16" telescope

Uranus - and 4 of its moons - less than 4 arcsec diameter, but it shows a resolved disk, with moons.


Stellar images