Surface structure and assessment of dust productivity of the cometary nucleus C/2017 K2 (PANSTARRS)
C/2017 K2 (PANSTARRS) is a dynamically new hyperbolic comet that has exhibited activity at an extremely large heliocentric distance of 23.75 au. Observations of comet C/2017 K2 were performed at Mayaki observational station of the Astronomical Observatory of Odesa I. I.