C/2021 A6 PanSTARRS
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Comet C/2021 A6 was discovered on 8 January 2021, about 4 months before its perihelion passage; later a series of prediscovery images was found from 22 December 2020 and 26 November 2020. In the moment of orbit determination, this comet was still observed.

Solution given here is based on data span over 2.51 yr in a range of heliocentric distances: 7.99 au – 7.93 au (perihelion) – 9.13 au.Orbits based on pre-perihelion and post-perihelion data independently were also obtained.

This Oort spike comet suffers tiny planetary perturbations during its passage through the planetary system that lead to a bit tight future orbit.
solution description
number of observations 98
data interval 2020 11 26 – 2021 05 12
data arc selection data generally limited to pre-perihelion (PRE)
range of heliocentric distances 7.99 au – 7.93 au (perihelion) – 7.92 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 188
RMS [arcseconds] 0.23
orbit quality class 1b
orbital elements (barycentric ecliptic J2000)
Epoch 1710 10 24
perihelion date 2021 05 03.44136057 ± 0.05732470
perihelion distance [au] 7.93691309 ± 0.00006991
eccentricity 0.99977469 ± 0.00003893
argument of perihelion [°] 351.673818 ± 0.003584
ascending node [°] 164.079693 ± 0.000195
inclination [°] 75.543606 ± 0.00088
reciprocal semi-major axis [10-6 au-1] 28.39 ± 4.90
file containing 5001 VCs swarm
2021a6pa.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.