Weather Report for December 4, 2012

There was scattered, thin cirrus throughout the night, which marked the start of campaign 45 at the Bok Telescope on Kitt Peak, AZ. The clouds were at their worst during the first hour of the night and during last couple of hours. They never slowed polarization measurements, but photometry of several blazars was impossible at the beginning and end of the night. The seeing was great throughout, usually better than 1.5 arcsec. Observations for a couple of objects were complicated by the moon, still two days prior to third quarter, being near them in the sky.