C/2020 U4 PanSTARRS
more info
Comet C/2020 U4 was discovered on 22 October 2020, about 1.5 yr before its perihelion passage; later a series of prediscovery images was found going back to 9 November 2019. In the moment of orbit determination, this comet was still observed.

Solution given here is based on data span over 3.25 yr in a range of heliocentric distances: 8.24 au – 5.35 au (perihelion) – 5.81 au.Orbits based on pre-perihelion and post-perihelion data independently were also obtained.

This Oort spike comet suffers rather small planetary perturbations during its passage through the planetary system; however, they lead to escape the comet from the solar system on hyperbolic barycentric orbit.
solution description
number of observations 530
data interval 2019 11 09 – 2022 03 24
data arc selection data generally limited to pre-perihelion (PRE)
range of heliocentric distances 8.24 au – 5.35au
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 1035
RMS [arcseconds] 0.30
orbit quality class 1a+
orbital elements (barycentric ecliptic J2000)
Epoch 1716 04 15
perihelion date 2022 04 10.67004391 ± 0.00057909
perihelion distance [au] 5.35310363 ± 0.00000351
eccentricity 0.99986933 ± 0.00000359
argument of perihelion [°] 69.660952 ± 0.000064
ascending node [°] 119.997387 ± 0.000018
inclination [°] 167.023713 ± 0.000008
reciprocal semi-major axis [10-6 au-1] 24.41 ± 0.67
file containing 5001 VCs swarm
2020u4pa.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.