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.
The stars Cor Caroli (bottom left) and Chara (top right) in Canes Venatici, with the bright galaxy Messier 94 at top left. Cor Caroli is a bright double star but is not resolved here. This is a stack of 6 x 6-minute exposures at ISO 800 with the William Optics RedCat 51mm astrograph at f/4.9 and Canon EOS Ra at ISO 800, from home May 23. The field is 8° x 5° so similar to binoculars. North is up.
