Bruce Murray Space Image Library
Cometary Interloper
![Cometary Interloper](https://planetary.s3.amazonaws.com/web/assets/pictures/_2400x1598_crop_center-center_82_line/20150327_cass_wide_55mm_f4_iso800_50.jpg 2400w, https://planetary.s3.amazonaws.com/web/assets/pictures/_1200x799_crop_center-center_82_line/20150327_cass_wide_55mm_f4_iso800_50.jpg 1200w, https://planetary.s3.amazonaws.com/web/assets/pictures/_768x511_crop_center-center_60_line/20150327_cass_wide_55mm_f4_iso800_50.jpg 768w, https://planetary.s3.amazonaws.com/web/assets/pictures/_576x383_crop_center-center_60_line/20150327_cass_wide_55mm_f4_iso800_50.jpg 576w)
Image captured from my observatory at the Texas Astronomical Society of Dallas dark sky site in Atoka, OK. Image captured with a Canon 60Da/ Canon L-series 24-105 mm f/4 lens at ISO800. Total exposure: 120-min using 12x10minute subexposures.
I worked very hard to obtain every minute of exposure as the field set into the treeline. This was a very challenging astroimaging feat as I had to balance the competing demands of obtaining a field wide enough to contain an area from the Andromeda galaxy to the Double Cluster with a setting sky (note the few trees in the western (lower left) sky).