Comets - C/2018 F4 PANSTARRS - CK18F040
Type Hyperbolic Perihelion Date 4 December 2019 Perihelion Distance (q) 3.4 Aphelion Distance (Q) n/a Period (Years) n/a Eccentricity (e) 1.00 Inclination (i) 78.1 Click for NASA orbit diagram Light curve needs updating
Hills Observatory: 1 January 2013 to 21 November 2020
2018 F4 (PanSTARRS) PanSTARRS discovered a 20th magnitude asteroid in images taken with the 1.8m Ritchey- Chretien on 17 March 2018. It was placed on the PCCP as P10HIgx but no cometary activity was confirmed at the time. The object was classified as a Hyperbolic Asteroid by JPL. Evidence for a cometary nature came in April, when follow up images showed a coma and tail. Taras Prystavski reported on comets-ml that there were two components in images taken on 12 September 2020. On 18 September Man-To Hui reported that images suggested suggested that the separation had occurred at least two months previously. Syuichi Nakano suggests that the separation of the two components probably occurred around the time of perihelion. Date 10x10 mag Error Kphot mag Coma ' 13-Sep-20 16.57 0.05 13.9 0.9 21-Sep-20 16.60 0.09 15.1 0.6 09-Oct-20 16.80 0.05 14.3 0.9 17-Nov-20 n/a n/a 14.7 0.8