C/2015 O1: A long-period comet with photometric observations

In this work, we report the observations of the long-period comet C/2015 O1 performed on 2018 January 29-30 and April 13 with the Nanshan 1-meter wide-field telescope operated by Xinjiang Astronomical Observatory. We obtain the morphological features of C/2015 O1 using an image enhancement method, and calculate the dust-activity parameter A f ρ and the coma color based on photometric analysis. An obvious fan-shaped structure was observed at different observation times. We find that the activity of C/2015 O1 gradually decreases as the comet advances toward perihelion and the observed B - V and V - R colors are consistent with those of other comets.

A contributed paper of the International Symposium on Lunar and Planetary Science (ISLPS) on 2018 June 12-15 at Macau University of Science and Technology.