C/2017 B3 LINEAR
more info
Comet C/2017 B3 was discovered on 26 January 2017 with the LINEAR survey, , that is about two years before its perihelion passage. Some prediscovery images of this comet were found: taken on 1 and 10 of Aprilnbsp;2016 by the Pan-STARRS 1 telescope (Haleakala).

Comet had its closest approach to the Earth on 19nbsp;Augustnbsp;2019 (3.480nbsp;au), about a 6.5nbsp;months after its perihelion passage.

Preferred NGnbsp;solution given here is based on data arc spanning over 5.83nbsp;yr in a range of heliocentric distances: 9.16 au – 3.92 au (perihelion) – 9.15 au.

This comet suffers small planetary perturbations during its passage through the planetary system; this is a long-period comet with original and future semimajor axes of about 3,300 au, and 2,100 au, respectively.
solution description
number of observations 277
data interval 2016 04 01 – 2018 05 23
data arc selection data generally limited to pre-perihelion (PRE)
range of heliocentric distances 8.98 au – 4.49au
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 523
RMS [arcseconds] 0.28
orbit quality class 1a+
next 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
next reciprocal semi-major axis [10-6 au-1] 470.58 – 471.65 – 472.75
next perihelion distance [au] 3.91119 – 3.9112 – 3.91122
next aphelion distance [103 au] 4.227 – 4.237 – 4.246
time interval to next perihelion [Myr] 0.09693 – 0.09726 – 0.09763
percentage of VCs with qnext < 10100
Upper panel: Time distribution of positional observations with corresponding heliocentric (red curve) and geocentric (green curve) distance at which they were taken. The horizontal dotted line shows the perihelion distance for a given comet whereas vertical dotted line — the moment of perihelion passage.
Middle panel(s): O-C diagram for a given solution (sometimes in comparison to another solution available in CODE), where residuals in right ascension are shown using magenta dots and in declination by blue open circles.
Lowest panel: Relative weights for a given data set(s).
next_g 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
next reciprocal semi-major axis [10-6 au-1] 470.57 – 471.64 – 472.75
next perihelion distance [au] 3.90708 – 3.90709 – 3.9071
next aphelion distance [103 au] 4.227 – 4.237 – 4.246
time interval to next perihelion [Myr] 0.09693 – 0.09726 – 0.09763
percentage of VCs with qnext < 10100