C/2012 F3 PANSTARRS
more info
Comet C/2012 F3 was discovered by the Pan-STARRS 1 telescope (Haleakala) on 16 March 2012 at a distance of 9.57 au from the Sun. A few pre-discovery images were obtained on 19 January 2012 (9.93 au from the Sun) and 2 March 2012. The comet reached its perihelion a bit more than three years later (3.46 au from the Sun, 6 April 2015), and was followed to 17 October 2017 (8.36 au from the Sun).
C/2012 F3 had its closest approach to the Earth on 4 July 2015 (2.564 au), 3 months after perihelion passage.
This Oort spike comet suffers quite large planetary perturbations during its passage through the planetary system that lead to escape the comet from the planetary zone on a hyperbolic orbit (see future barycentric orbit).
See also Wysoczańska et al., 2020.

solution description
number of observations 1752
data interval 2012 01 19 – 2017 10 17
data type perihelion within the observation arc (FULL)
data arc selection entire data set (STD)
range of heliocentric distances 9.93 au – 3.46 au (perihelion) – 8.36 au
type of model of motion NS - non-gravitational orbits for standard g(r)
data weighting YES
number of residuals 3459
RMS [arcseconds] 0.34
orbit quality class 1a+
next orbit elements (barycentric ecliptic J2000)
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 recip semi-major axis [10-6 au-1] -801.66 ± 0.54
next perihelion distance [au] 6.987 ± 0.003
synchronous stop epoch [Myr] 0.644 S
percentage of VCs with q < 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.
Lower panel (panels): O-C diagram for this(two) solution (solutions) given in this database, where residuals in right ascension are shown using magenta dots and in declination by blue open circles.