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 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+ |
previous orbit statistics, both Galactic and stellar perturbations were taken into account | ||
---|---|---|
no. of returning VCs in the swarm | 5001 | * |
no. of escaping VCs in the swarm | 0 | |
no. of hyperbolas among escaping VCs in the swarm | 0 | |
previous reciprocal semi-major axis [10-6 au-1] | 21.32 – 22.23 – 23.26 | |
previous perihelion distance [au] | 827 – 932 – 990 | |
previous aphelion distance [103 au] | 85 – 89 – 93 | |
time interval to previous perihelion [Myr] | 8.75 – 9.28 – 9.85 | |
percentage of VCs with qprev > 20 | 100 |
previous orbit statistics, here only the Galactic tide has been included | ||
---|---|---|
no. of returning VCs in the swarm | 5001 | * |
no. of escaping VCs in the swarm | 0 | |
no. of hyperbolas among escaping VCs in the swarm | 0 | |
previous reciprocal semi-major axis [10-6 au-1] | 23.51 – 24.37 – 25.25 | |
previous perihelion distance [au] | 110 – 130 – 160 | |
previous aphelion distance [103 au] | 79.1 – 81.9 – 84.9 | |
time interval to previous perihelion [Myr] | 7.8 – 8.22 – 8.66 | |
percentage of VCs with qprev > 20 | 100 |