C/2012 K1 PANSTARRS
more info
Comet C/2012 K1 was discovered on 19 May 2012 with Pan-STARRS 1 telescope (Haleakala), that is more than 2 years before its perihelion passage. Later a few pre-discovery images were found taken on 14 May ( MASTER-II Observatory, Tunka) and 17 May (Pan-STARRS 1). It was almost systematically observed until 7 August 2016 (see picture).
C/2012 K1 had its closest approach to the Earth on 31 October 2014 (0.953 au), about 2 months after its perihelion passage.
Preferred solution given here is based on data spanning over 4.23 yr in a range of heliocentric distances: 8.83 au – 1.055 au (perihelion) – 7.85 au.
This Oort spike comet suffers small planetary perturbations during its passage through the planetary system that cause a bit tighter future orbit (see future barycentric orbits).
See also Królikowska 2020.

solution description
number of observations 7889
data interval 2012 05 14 – 2016 08 07
data type perihelion within the observation arc (FULL)
data arc selection entire data set (STD)
range of heliocentric distances 8.83 au – 1.05 au (perihelion) – 7.85 au
detectability of NG effects in the comet's motion comet with NG effects strongly manifested in positional data fitting
type of model of motion GR - gravitational orbit
data weighting YES
number of residuals 15752
RMS [arcseconds] 0.67
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] 91.93 – 92.18 – 92.44
next perihelion distance [au] 1.173 – 1.174 – 1.176
next aphelion distance [103 au] 21.63 – 21.7 – 21.75
time interval to next perihelion [Myr] 1.124 – 1.129 – 1.133
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.
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.
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] 91.92 – 92.17 – 92.43
next perihelion distance [au] 1.189 – 1.191 – 1.192
next aphelion distance [103 au] 21.64 – 21.7 – 21.76
time interval to next perihelion [Myr] 1.124 – 1.129 – 1.134
percentage of VCs with qnext < 10100