Comet 2013 US10 Catalina will appear in the morning sky for UK observers from the end of November. It looks like it will become a binocular object at least; fingers crossed that it becomes brighter still!
Here's a finderchart showing the trajectory of the comet during December and early January.
Comet Catalina is tracking north very rapidly. During December it moves from Virgo into Bootes. On the first day of 2016 the comet will pass within 1 degree of Arcturus - the brightest star in the northern hemisphere of the sky. The contrasting colours of orange Arcturus and the dusty comet (perhaps with a green coma) should make an excellent photo!
Comet Catalina reaches perihelion (closest point to the Sun) on November 15th. The comet will be 0.82 AU (123 million km) from the Sun; between the orbits of Venus and Earth. Catalina won't be visible from the UK until it has moved further north, away from the Sun's glare towards the end of the month. Comet Catalina will be closest to Earth on January 17th 2016, at a distance of 0.72 AU (108 million km).
Comet Catalina was discovered by the Catalina Sky Survey in 2013. It is a dynamically new comet; it was perturbed from the Oort Cloud several million years ago and the trajectory after perihelion shows it will likely be ejected from the solar system - never to return.
Catalina is predicted to fade slightly after perihelion with brightness estimates putting it between 5th and 6th magnitudes. Dark skies away from light pollution should allow anyone with binoculars and telescopes to view the comet.
Dr Adrian Jannetta
Guitar strummin' explorer of the universe. Mild mannered maths teacher by day and astronomer by night.