C/2017 F2 PANSTARRS
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Comet C/2017 F2 was discovered on 31 March 2017 with Pan-STARRS 1 telescope (Haleakala), that is about 8 months before its perihelion passage. This comet was rarely observed until 12 December 2018.
Comet had its closest approach to the Earth on 31 March 2018 (6.070 au), about 4 months after its perihelion passage.
Solution given here is based on data spanning over 1.70 yr in a range of heliocentric distances: 7.10 au – 6.928 au (perihelion) – 7.35 au.
This Oort spike comet suffers moderate planetary perturbations during its passage through the planetary system; these perturbations lead to escape the comet from the planetary zone on a hyperbolic orbit (see future barycentric orbits).

solution description
number of observations 62
data interval 2017 03 31 – 2018 12 12
data type perihelion within the observation arc (FULL)
data arc selection entire data set (STD)
range of heliocentric distances 7.1 au – 6.93 au (perihelion) – 7.35 au
detectability of NG effects in the comet's motion NG effects not determinable
type of model of motion GR - gravitational orbit
data weighting YES
number of residuals 112
RMS [arcseconds] 0.37
orbit quality class 1a
orbital elements (heliocentric ecliptic J2000)
Epoch 2017 11 23
perihelion date 2017 11 26.39477058 ± 0.00772893
perihelion distance [au] 6.92768201 ± 0.00002120
eccentricity 1.00537344 ± 0.00002119
argument of perihelion [°] 134.917674 ± 0.000567
ascending node [°] 38.668130 ± 0.000065
inclination [°] 42.507672 ± 0.000035
recip semi-major axis [10-6 au-1] -775.65 ± 3.05
Time distribution of positional observations with corresponding heliocentric (red curve) and geocentric (green curve) distance at which they were taken. The horizontal dotted line shows the perihelion distance for a given comet whereas vertical dotted line – the moment of perihelion passage