Events of Interest at STEM Laboratory

List of events:
March 31, 2014 Arizona-Sonora Desert Museum, Tucson Az “Light at Night Monitoring Techniques and Wildlife Conservation” Docents Meeting
Desert Museum
June 13, 2014 Ontario Airport Hotel
Ontario, CA
“A Strategy for Urban Observatory Site Preservation: An Arizona Example” at:
Symposium on Telescope Science
Joint Meeting of the SAS/AAVSO/CBA
SAS Symposium     Presentation Text
Sept 5, 2014 NOAO
Main Conference Rm
950 N. Cherry Ave.
Tucson, Az
"Public Policy and Strategy for Preservation of Southern Arizona Observatory Sites" by Dr. Eric R. Craine

The application of new tools, satellite and airborne surveillance of light at night (LAN), has enabled refinement of techniques for preserving astronomical observing sites. We look at results of two new surveys of LAN in Pima County as they relate to conventional wisdom regarding presumed effectiveness of the Pima County Lighting Code. These surveys provide new insight to the LAN threat to Southern Arizona observatories. In particular, astronomical observations made at Kitt Peak National Observatory in 2010, represented as evidence for the effectiveness of the Pima County Lighting Code, are subject to an alternative interpretation. The surveys also identify specific sources of light that, though represented as dark sky friendly, full-cutoff fixtures, are among the worst sources of light pollution in Pima County. Serious efforts to preserve local observatories from effects of light pollution would benefit from more comprehensive techniques of measuring and monitoring. We offer a plan for such implementation that could help delay divestiture of remaining astronomical facilities.