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
detectability of NG effects in the comet's motion	comet with NG effects strongly manifested in positional data fitting
type of model of motion	GR - gravitational orbit
data weighting	YES
number of residuals	7235
RMS [arcseconds]	0.35
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]	34.74 – 34.94 – 35.12
previous perihelion distance [au]	469 – 479 – 489
previous aphelion distance [10³ au]	56.48 – 56.77 – 57.08
time interval to previous perihelion [Myr]	4.173 – 4.212 – 4.254
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]	36.34 – 36.63 – 36.89
previous perihelion distance [au]	0.98 – 1.01 – 1.05
previous aphelion distance [10³ au]	54.21 – 54.61 – 55.03
time interval to previous perihelion [Myr]	4.38 – 4.42 – 4.47
percentage of VCs with q_prev < 10	100