Variations in the volatile-driven activity of comet C/2017 K2 (PanSTARRS) revealed by long-term multiwavelength observations

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Table 1

TRAPPIST observational circumstances and orbital elements of comet C/2017 K2.

Comet	i (◦)	T_j	Peri (au)	Tp (UTC)	r_h-range Pre/Post (au)	Dates Start/End	Number of nights		Number of images
Comet	i (◦)	T_j	Peri (au)	Tp (UTC)	r_h-range Pre/Post (au)	Dates Start/End	TN	TS	TN	TS
C/2017 K2 (PanSTARRS)	87.55	0.17	1.79	19.12.2022	15.18–1.79–8.46	25.10.2017–20.04.2025	151	120	1323	881

Notes. i: inclination. T_j : Jupiter-Tisserand invariant. Peri: Perihelion distance. T_p : time of perihelion passage. The format of the date is day.month.year.

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