Spectroscopic and dynamical properties of comet C/2018 F4, likely a true average former member of the Oort cloud

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Table 1

Heliocentric and barycentric orbital elements and 1σ uncertainties of comet C/2018 F4 (PANSTARRS).

Orbital parameter		Heliocentric	Barycentric
Perihelion distance, q (AU)	=	3.4417 ± 0.0004	3.4355
Eccentricity, e	=	1.00077 ± 0.00011	0.99771
Inclination, i (°)	=	78.160 ± 0.003	78.256
Longitude of the ascending node, Ω (°)	=	26.51923 ± 0.00004	26.46807
Argument of perihelion, ω (°)	=	263.167 ± 0.004	263.321
Mean anomaly, M (°)	=	−0.0020 ± 0.0004	359.9899

Notes. Theorbit determination has been computed at epoch JD 2458227.5 that corresponds to 00:00:00.000 TDB, Barycentric Dynamical Time, on 2018 April 19, J2000.0 ecliptic and equinox. Source: JPL’s SSDG SBDB.

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