C/2017 K5 PANSTARRS
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Comet C/2017 K5 was discovered on 27 May 2017 with Pan-STARRS 1 telescope (Haleakala), that is almost 3 years before its perihelion passage. This comet was observed until 9 July 2020.

Comet will have its closest approach to the Earth on 2 July 2020 (6.688 au), a bit more than a 3 months after its perihelion passage.

The preferred solution given here is based on pre-perihelion data spanning over 3.12 yr in a range of heliocentric distances from 9.90 au – 7.68 au (perihelion) – 7.71 au.

This Oort spike comet suffers small planetary perturbations during its passage through the planetary system that likely lead to escape the comet from the planetary zone on a hyperbolic orbit (see future barycentric orbits).
solution description
number of observations 118
data interval 2017 05 27 – 2020 07 09
data type almost all measurements before perihelion (PRE++)
data arc selection entire data set (STD)
range of heliocentric distances 9.9 au – 7.68 au (perihelion) – 7.71 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 229
RMS [arcseconds] 0.49
orbit quality class 1a
next orbit statistics, both Galactic and stellar perturbations were taken into account
no. of returning VCs in the swarm 0
no. of escaping VCs in the swarm 5001
no. of hyperbolas among escaping VCs in the swarm 5001 *
next reciprocal semi-major axis [10-6 au-1] -229.22 – -226.30 – -223.26
next perihelion distance [au] 6.5 – 6.516 – 6.533
synchronous stop epoch [Myr] 1.12 S
percentage of VCs with qnext < 10100
next orbit statistics, here only the Galactic tide has been included
no. of returning VCs in the swarm 0
no. of escaping VCs in the swarm 5001
no. of hyperbolas among escaping VCs in the swarm 5001 *
next reciprocal semi-major axis [10-6 au-1] -229.26 – -226.34 – -223.30
next perihelion distance [au] 8.999 – 9.019 – 9.038
synchronous stop epoch [Myr] 1.14 S
percentage of VCs with qnext < 10100