C/2016 E1 PANSTARRS
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Comet C/2016 E1 was discovered on 3 March 2016 with Pan-STARRS 1 telescope (Haleakala), that is about 1.3 yr before its perihelion passage. This comet was observed until 1 January 2020.

Comet had its closest approach to the Earth on 10 April 2017 (7.345 au), almost 2 months before its perihelion passage.

The preferred solution given here is based on data spanning over 3.83 yr in a range of heliocentric distances: 8.62 au – 8.18 au (perihelion) – 9.90 au.

This Oort spike comet suffers rather small planetary perturbations during its passage through the planetary system; however, these perturbations likely lead to escape the comet from the planetary zone on a hyperbolic orbit (see future barycentric orbits).
solution description
number of observations 166
data interval 2016 03 03 – 2020 01 01
data type perihelion within the observation arc (FULL)
data arc selection entire data set (STD)
range of heliocentric distances 8.62 au – 8.18 au (perihelion) – 9.9 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 323
RMS [arcseconds] 0.21
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] 37.25 – 37.76 – 38.21
previous perihelion distance [au] 27.4 – 28.5 – 29.3
previous aphelion distance [103 au] 52.3 – 52.9 – 53.7
time interval to previous perihelion [Myr] 3.27 – 3.4 – 3.53
percentage of VCs with qprev > 20100
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] 41.52 – 42.78 – 44.09
previous perihelion distance [au] 12.2 – 12.7 – 13.2
previous aphelion distance [103 au] 45.3 – 46.7 – 48.2
time interval to previous perihelion [Myr] 3.37 – 3.52 – 3.68
percentage of VCs with 10 < qprev < 20100