C/2017 K1 PANSTARRS
more info
Comet C/2017 K1 was discovered on 21 May 2017 with Pan-STARRS 1 telescope (Haleakala), that is about 10 months before its perihelion passage. This comet was observed until 25 May 2019.
Comet had its closest approach to the Earth on 29 April 2018 (6.286 au), about 1.5 month after its perihelion passage.
Solution given here is based on data spanning over 0.99 yr in a range of heliocentric distances: 7.52 au – 7.286 au (perihelion) – 7.30 au (16 May 2018).
This Oort spike comet suffers tiny planetary perturbations during its passage through the planetary system that likely lead to a bit tighter future orbit (see future barycentric orbits).

solution description
number of observations 83
data interval 2017 05 21 – 2018 05 16
data type perihelion within the observation arc (FULL)
data arc selection entire data set (STD)
range of heliocentric distances 7.52 au – 7.29 au (perihelion) – 7.3 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 159
RMS [arcseconds] 0.49
orbit quality class 1b
orbital elements (heliocentric ecliptic J2000)
Epoch 2018 03 23
perihelion date 2018 03 14.27851484 ± 0.02774531
perihelion distance [au] 7.28556118 ± 0.00004541
eccentricity 1.00245517 ± 0.00003082
argument of perihelion [°] 4.167719 ± 0.001947
ascending node [°] 225.642163 ± 0.000033
inclination [°] 154.009539 ± 0.00008
recip semi-major axis [10-6 au-1] -336.99 ± 4.22