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	7177
RMS [arcseconds]	0.28
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]	20.83 – 21.25 – 21.68
previous perihelion distance [au]	1750 – 1840 – 1940
previous aphelion distance [10³ au]	90.5 – 92.3 – 94.1
time interval to previous perihelion [Myr]	8.78 – 9.03 – 9.28
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]	18.45 – 18.96 – 19.47
previous perihelion distance [au]	180 – 220 – 260
previous aphelion distance [10³ au]	103 – 105 – 108
time interval to previous perihelion [Myr]	10.4 – 10.8 – 11.1
percentage of VCs with q_prev > 20	100