Cetus, low in my autumn sky on a fine night in November 2019, but with some cloud just beginning to move in at bottom, and with the constellation just above my treetops. Mira, at left of centre, was a month past maximum brightness and was magnitude 3 or so, easily naked eye. Menkar (aka Alpha Ceti) is the bright star at upper left; Diphda (aka Deneb Kaitos or Beta Ceti) is the bright star at lower right. This is a stack of 5 x 2-minute exposures with the 35mm lens at f/2.5 and Canon 6D MkII at ISO 800, on the LighTrack II tracker. An additional exposure through the Kenko Softon A filter adds the star glows.
Comet Catalina (C/2013 US10) near Arcturus in the constellation of Bootes, at pre-dawn on the morning of January 1, 2016, with the Last Quarter Moon nearby illluminating the sky. A long, faint ion tail is visible extending 2 to 3 degrees to the right while a brighter but stubby dust tail extends down to the south. Shot from home using the 200mm Canon telephoto and 1.4x extender at f/4.5 for a stack of 8 x 2-minute exposures at ISO 800 with the Canon 6D. Median combined stacked to eliminate satellite trails. The comet is slightly blurred due to its own motion in that time.
The classic double star Cor Caroli, aka Alpha Canum Venaticorum, in Canes Venatici. The seapation is 19 arc seconds so shows up easily here. This is a stack of 8 x 8-second exposures at ISO 800 with the Celestron C9.25-inch SCT at f/10 and Canon 6D MkII at ISO 800. Taken March 27, 2019.
