C/2017 E3 PANSTARRS
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Comet C/2017 E3 was discovered on 7 March 2017 with Pan-STARRS 1 telescope (Haleakala), that is about 3 months before its perihelion passage. Later, it was found on a series of earlier images going back to December 2013. This comet was observed until 20 June 2020.

Comet had its closest approach to the Earth on 24 April 2017 (3.480 au), about 1.5 month after discovery and more than a month before its perihelion passage.

Solutions given here are based on data spanning over 6.51 yr in a range of heliocentric distances: 10.28 au   5.915 au (perihelion)   9.53 au (July 2023).

This Oort spike comet suffers moderate planetary perturbations during its passage through the planetary system; these perturbations lead to escape the comet from the planetary zone on a hyperbolic orbit (see future barycentric orbits).

See also Królikowska and Dones 2023.
solution description
number of observations 348
data interval 2017 03 07 – 2018 05 24
data type perihelion within the observation arc (FULL)
data arc selection entire data set (STD)
range of heliocentric distances 6.42 au – 5.91 au (perihelion) – 7.9 au
detectability of NG effects in the comet's motion NG effects not determinable
type of model of motion GR - gravitational orbit
data weighting YES
number of residuals 684
RMS [arcseconds] 0.45
orbit quality class 1a
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] -742.14 – -740.77 – -739.42
next perihelion distance [au] 5.19135 – 5.19156 – 5.19177
synchronous stop epoch [Myr] 0.695 S
percentage of VCs with qnext < 10100
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] -742.19 – -740.82 – -739.47
next perihelion distance [au] 5.23724 – 5.23726 – 5.23728
synchronous stop epoch [Myr] 0.667 S
percentage of VCs with qnext < 10100