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 164
data interval 2020 11 20 – 2023 05 24
data type perihelion within the observation arc (FULL)
data arc selection entire data set (STD)
range of heliocentric distances 7.99 au – 7.93 au (perihelion) – 9.13 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 316
RMS [arcseconds] 0.23
orbit quality class 1a+
orbital elements (barycentric ecliptic J2000)
Epoch 1710 09 14
perihelion date 2021 05 03.31999781 ± 0.00149688
perihelion distance [au] 7.93689652 ± 0.00000550
eccentricity 0.99970492 ± 0.00000411
argument of perihelion [°] 351.666186 ± 0.000091
ascending node [°] 164.079819 ± 0.000004
inclination [°] 75.542981 ± 0.00001
reciprocal semi-major axis [10-6 au-1] 37.18 ± 0.52
file containing 5001 VCs swarm
2021a6ba.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.