Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928
These pictures of Comet 17P/Holmes were taken by Apostolos Christou of
Armagh Observatory on the evening of 2007 November 22nd using a 15 cm
Newtonian and ST-7.
22:45 UT 30 sec exposure
23:15 UT 45 sec exposure
23:27 UT 30 sec exposure
The comet moves by more than 20 arcsec between the first and last of these
three images, as shown in this animation.