C/2020 O2 | CODEC

C/2020 O2 Amaral

Comet C/2020 O2 was discovered on 23 July 2020, more than one year before its perihelion passage. 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 1.10 yr in a range of heliocentric distances from 5.76 au to 4.86 au.

This is Oort spike comet.

2020o2pa 2020o2pc

solution description
number of observations	507
data interval	2020 07 23 – 2021 08 28
data arc selection	data generally limited to pre-perihelion (PRE)
range of heliocentric distances	5.76 au – 4.86 au (perihelion) – 4.86 au
type of model of motion	NC - non-gravitational orbits for symmetric CO-g(r)-like function
data weighting	YES
number of residuals	986
RMS [arcseconds]	0.27
orbit quality class	1a

previous orbit statistics, both Galactic and stellar perturbations were taken into account
no. of returning VCs in the swarm	5000	*
no. of escaping VCs in the swarm	1
no. of hyperbolas among escaping VCs in the swarm	0
previous reciprocal semi-major axis [10^-6 au^-1]	33.21 – 40.38 – 43.75	R
previous perihelion distance [au]	63 – 560 – 1100	R
previous aphelion distance [10³ au]	45.5 – 49 – 59.2	R
time interval to previous perihelion [Myr]	2.6 – 3.4 – 4.9	R
percentage of VCs with q_prev < 10	7
percentage of VCs with 10 < q_prev < 20	1
percentage of VCs with q_prev > 20	92

previous orbit statistics, here only the Galactic tide has been included
no. of returning VCs in the swarm	4999	*
no. of escaping VCs in the swarm	2
no. of hyperbolas among escaping VCs in the swarm	0
previous reciprocal semi-major axis [10^-6 au^-1]	34.20 – 43.77 – 53.23	R
previous perihelion distance [au]	5.6 – 6.5 – 10	R
previous aphelion distance [10³ au]	38 – 46 – 58	R
time interval to previous perihelion [Myr]	2.6 – 3.5 – 5	R
percentage of VCs with q_prev < 10	89
percentage of VCs with 10 < q_prev < 20	9
percentage of VCs with q_prev > 20	2