C/2009 F4 McNaught
more info
Comet C/2009 F4 was discovered on 19 March 2009, that is 2.8 yr before perihelion passage, and next was observed 6.4 yr during seven oppositions in a range of heliocentric distances: 8.96 au – 5.455 au (perihelion) – 10.5 au.

Comet had its closest approach to the Earth on 3 June 2011 (5.179 au, almost seven months before perihelion).

NG orbits using full data-arc as well as using pre-perihelion data arc are determinable.

This Oort spike comet suffers a tiny planetary perturbations during its passage through the planetary system that lead to a more tight future orbit (see future barycentric orbit).

See also Królikowska and Dones 2023 and Królikowska and Dybczyński 2017.
solution description
number of observations 595
data interval 2012 01 01 – 2015 08 20
data arc selection data generally limited to post-perihelion (POS)
range of heliocentric distances 5.46 au – 10.55au
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 1158
RMS [arcseconds] 0.60
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] 115.37 – 116.52 – 117.61
next perihelion distance [au] 5.2907 – 5.2963 – 5.3015
next aphelion distance [103 au] 17 – 17.16 – 17.33
time interval to next perihelion [Myr] 0.783 – 0.794 – 0.806
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 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] 115.36 – 116.51 – 117.60
next perihelion distance [au] 5.2879 – 5.2934 – 5.2985
next aphelion distance [103 au] 17 – 17.16 – 17.33
time interval to next perihelion [Myr] 0.783 – 0.794 – 0.806
percentage of VCs with qnext < 10100