Group 5 – Module 1: Observing the Moon and Planets

We observed the Moon using the HSC telescope. This process began by setting our min target elevation to 30 and min visible hours to 0.75 so as to get a clear view of the moon. From there we selected filters U, Halpha, and OII at a number of 25 exposures for 0.125 seconds. Once the images returned we moved them over to afterglow for further edits. We began with cosmetic correction to clear out any bad pixels. There was no need to align our images because of the wide lens on the HSC telescope. From here we moved on to stacking the images from the 3 different filters. Then we toyed around with the brightness and contrast settings. Stretch mode was set to midtone where we applied different midtone level percentiles to the different filters to get them to match up in the stacked image. This process generated the image above.

Here we observed the moons radio wavelengths again using the HSC telescope. We began the process of calculating the moons temperature by using the photometry tool in afterglow. We calculated the flux density to be 3988 units when the moon was half full and 4701 units when the moon was full. For our calibration images we used Cyg G which had a flux density of 4312 units when the moon as half full and 4135 units when the moon was half full. From here we used an arbitrary ratio to compare the two. Using Skynet we were able find our jansky units to be 851.1 and 851 jy. Using the ratio between the two we multiplied it by the jansky of the calibration images which resulted in 802 and 975 janskys. From here we needed to determine how far away the moon was. Ultimatley it was determined that the moon was 384000 km and 40400 km on the dates observed. Using the Raleigh-Jeans limit 231 K when full and 251 K when half full. It is odd that we calculated the moon to be brighter when half full, this could be due to errors in calculation.

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