This duo hangs in far eastern Canes Venatici, just across the border from Ursa Major. They are shown in the sketch at left, which captures a 129X view in my 10-inch Meade Newtonian. NGC 4151 is the larger and brighter of the two. This 10.8 magnitude spiral boasts a large 6'.5x5'.0 profile, according to RC3. My drawing records the inner 3'x2' complete with a stellar appearing core. An 11th magnitude GSC star shines 2'.3 to the north. 8.2 magnitude HD 105663 can be seen about 8' to the west. NGC 4156 is the delicate 30"x20" glow about 5' northeast of NGC 4151. NGC 4156 has a faint 13.2 integrated visual magnitude. However, its 22.3 magnitude per square arc second surface brightness is only moderately faint. No hint of this galaxy's barred-spiral structure is visible.