C/2019 U5 | CODEC

C/2019 U5 PanSTARRS

Comet C/2019 U5 was discovered on 22 October 2019, about 3.5 yr before its perihelion passage (10.38 au from the Sun). Later two pre-discovery observations were found from 11 October 2019 (heliocentric disctance: 10.45 au). In the moment of orbit determination, this comet was still observed.

Currently, solutions (GR and NG) based on pre-perihelion data are given. Therefore, the data arc span over 3.46 yr in a range of heliocentric distances from 10.45 au to 3.62 au.

This is Oort spike comet.

2019u5pa 2019u5pc 2019u5pd

solution description
number of observations	3637
data interval	2019 10 11 – 2023 03 29
data arc selection	data generally limited to pre-perihelion (PRE)
range of heliocentric distances	10.45 au – 3.62 au (perihelion) – 3.62 au
type of model of motion	NC - non-gravitational orbits for symmetric CO-g(r)-like function
data weighting	YES
number of residuals	7235
RMS [arcseconds]	0.31
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]	23.63 – 24.13 – 24.61
previous perihelion distance [au]	1270 – 1330 – 1410
previous aphelion distance [10³ au]	80 – 81.5 – 83.2
time interval to previous perihelion [Myr]	7.35 – 7.56 – 7.79
percentage of VCs with q_prev > 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]	21.80 – 22.41 – 22.98
previous perihelion distance [au]	58 – 70 – 85
previous aphelion distance [10³ au]	87 – 89.2 – 91.7
time interval to previous perihelion [Myr]	8.45 – 8.73 – 9.05
percentage of VCs with q_prev > 20	100