A Newsletter Article on the Sierra Stars Observatory Network

Included in the January 2014 issue of Event Horizon, the newsletter of the Hamilton Amateur Astronomers, is a short article I wrote on my experiences in 2013 with the Sierra Stars Observatory Network (http://sierrastars.com/).

You can download the PDF newsletter here: http://www.amateurastronomy.org/EH/January2014.pdf

Back issues of Event Horizon are available here: http://www.amateurastronomy.org/newslett.php

I was very happy with the article, and that the editor chose to use one of my photos (of Comet C/2011 L4 (PANSTARRS)) as the masthead for the issue.


Comet C/2011 L4 (PANSTARRS) imaged with the Sierra Stars Observatory Network. The image is described below.

The above image of Comet C2011 L4 (PANSTARRS) was taken with the Schulman 0.81 m Mt. Lemmon SkyCentre telescope in southern Arizona early on the morning of 19 June 2013, on-line with the Sierra Stars Observatory Network. This was a simple stack of four images (one each, L, R, G, B) of 90 seconds each. The default setting for the camera is a 2×2 binning.

The Mt. Lemmon SkyCenter 0.81 meter is an f/7 Ritchey–Chrétien equipped with an SBIG STX KAF-16803 camera. The image covers 22.5 x 22.5 arc minutes: a bit more than a third of a degree across the sky (for comparison, the disk of the full moon covers about a half a degree, or around 30 arc minutes).

Copyright © 2014 David Allan Galbraith