C/2019 G4 PanSTARRS
more info
Comet C/2019 G4 was discovered on 9 April 2019, about 7 months after its perihelion passage. Later a two pre-discovery observations were found from 24 July 2018, these two measurements are the only data taken before perihelion passage.

Solution given here span over 2.30 yr in a range of heliocentric distances: 5.87 au – 5.86 au (perihelion) – 7.99 au.

This Oort spike comet suffers small planetary perturbations during its passage through the planetary system that lead to a more tight future orbit (see future barycentric orbit).
solution description
number of observations 38
data interval 2018 07 24 – 2020 11 11
data type perihelion within the observation arc (FULL)
data arc selection entire data set (STD)
range of heliocentric distances 5.87 au – 5.86 au (perihelion) – 7.99 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 75
RMS [arcseconds] 0.26
orbit quality class 1a
orbital elements (barycentric ecliptic J2000)
Epoch 1711 01 12
perihelion date 2018 09 13.44072755 ± 0.00317615
perihelion distance [au] 5.84887750 ± 0.00002056
eccentricity 0.99945591 ± 0.00001190
argument of perihelion [°] 287.818917 ± 0.000370
ascending node [°] 130.445643 ± 0.000052
inclination [°] 138.344426 ± 0.000045
reciprocal semi-major axis [10-6 au-1] 93.03 ± 2.04
file containing 5001 VCs swarm
2019g4a5.bmi
Six 2D-projections of the 6D space of original swarm including 5001 VCs. Each density map is given in logarithmic scale presented on the right in the individual panel.