C/2017 K5 PANSTARRS
more info
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. In March 2020, it reached its perihelion. After almost six months break, this comet was observed in April 2020, and is still observable.
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.
Solution given here is based on pre-perihelion data spanning over 0.96 yr in a range of heliocentric distances from 9.90 au to 8.74 au (12 May 2018).
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 25
data interval 2017 05 27 – 2018 05 12
data type observed only before perihelion (PRE)
data arc selection entire data set (STD)
range of heliocentric distances 9.9 au – 8.74au
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 50
RMS [arcseconds] 0.35
orbit quality class 1b
orbital elements (heliocentric ecliptic J2000)
Epoch 2020 03 12
perihelion date 2020 03 24.31625348 ± 0.02728133
perihelion distance [au] 7.67854718 ± 0.00032727
eccentricity 1.00600594 ± 0.00007627
argument of perihelion [°] 171.840159 ± 0.003984
ascending node [°] 102.375784 ± 0.000336
inclination [°] 82.262549 ± 0.000179
recip semi-major axis [10-6 au-1] -782.17 ± 10.03
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