C/2019 Q1 | CODEC

C/2019 Q1 Lemmon

Comet C/2019 Q1 was discovered on 28 August 2019, almost one year before its perihelion passage. Later two series of pre-discovery observations were found from 2 January 2019 and 10 November 2018.

Solutions (GR and NG) given here are based on data span over 2.56 yr in a range of heliocentric distances: 6.80 au – 5.00 au (perihelion) – 5.56 au. Orbits based on pre-perihelion and post-perihelion data independently were also obtained.

This Oort spike comet suffers small planetary perturbations during its passage through the planetary system; however, they lead to escape this comet from the solar system on hyperbolic orbit (see future barycentric orbits).

2019q1ba 2019q1pa 2019q1pc 2019q1ra

solution description
number of observations	87
data interval	2020 07 26 – 2021 06 04
data arc selection	data generally limited to post-perihelion (POS)
range of heliocentric distances	5 au – 5.56au
detectability of NG effects in the comet's motion	comet with determinable NG~orbit
type of model of motion	GR - gravitational orbit
data weighting	YES
number of residuals	166
RMS [arcseconds]	0.26
orbit quality class	1b

next orbit statistics, both Galactic and stellar perturbations were taken into account
no. of returning VCs in the swarm	0
no. of escaping VCs in the swarm	5001
no. of hyperbolas among escaping VCs in the swarm	5001	*
next reciprocal semi-major axis [10^-6 au^-1]	-66.84 – -63.82 – -60.86
next perihelion distance [au]	99.4 – 101 – 102
synchronous stop epoch [Myr]	1.69	S
percentage of VCs with q_next > 20	100

next orbit statistics, here only the Galactic tide has been included
no. of returning VCs in the swarm	0
no. of escaping VCs in the swarm	5001
no. of hyperbolas among escaping VCs in the swarm	5001	*
next reciprocal semi-major axis [10^-6 au^-1]	-71.84 – -68.74 – -65.71
next perihelion distance [au]	16.2 – 16.6 – 17
synchronous stop epoch [Myr]	1.73	S
percentage of VCs with 10 < q_next < 20	100