Comet Hartley 2 on October 7, 2010 as it approached the Double Cluster. Stack of 5 x 6 minute exposures at ISO 1600 with Canon 5D MkII on A&M 105mm apo refractor at f/5.1 with Borg reducer/flattener. Autoguided with Celestron NexGuide autoguider. However, image of comet core is from only one exposure to minimize trailing from this fast-moving comet.
Comet Hartley 2 near the Pacman Nebula, NGC 281, in Cassiopeia. Stack of 4 x 5 minute exposures at ISO 1600 with Canon 5D MkII on A&M 105mm apo refractor at f/4.8 with Borg reducer/flattener. Autoguided with Celestron NexGuide autoguider. However, image of comet core is from only one exposure to minimize trailing from this fast-moving comet.
This is Comet Hartley 2 as it appeared on the night of October 9/10, 2010 as it travelled through Perseus. The comet is the cyan glow at left, wth the Double Cluster at lower right and the complex of red nebulosity of IC 1848 / IC 1805 / IC 1795 at top. Technical: This is a stack of 5 x 2.5 minute exposures at ISO 1600 with Canon 5D MkII on 135mm L-series telephoto lens at f/3.2. Tracked the sky on Kenko SkyMemo tracking platform to follow the stars.
