C/2012 K8 Lemmon
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Comet C/2012 K8 was discovered on 30 May 2012 with Mount Lemmon survey, that is about 2.2 years before its perihelion passage. It was observed during five oppositions until 8 June 2016.
Comet had its closest approach to the Earth on 21 June 2014 (6.120 au), about 2 months before perihelion passage.
Solution given here is based on data spanning over 4.02 yr in a range of heliocentric distances: 8.40 au – 6.463 au (perihelion) – 7.81 au.
This Oort spike comet suffers very tiny planetary perturbations during its passage through the planetary system and in the next perihelion passage it will be an Oort spike comet.

solution description
number of observations 987
data interval 2012 05 30 – 2016 06 08
data type perihelion within the observation arc (FULL)
data arc selection entire data set (STD)
range of heliocentric distances 8.4 au – 6.46 au (perihelion) – 7.81 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 1918
RMS [arcseconds] 0.45
orbit quality class 1a+
orbital elements (heliocentric ecliptic J2000)
Epoch 2014 08 11
perihelion date 2014 08 19.35362628 ± 0.00056443
perihelion distance [au] 6.46300213 ± 0.00000324
eccentricity 1.00187856 ± 0.00000319
argument of perihelion [°] 75.851350 ± 0.000044
ascending node [°] 312.807424 ± 0.000009
inclination [°] 106.111836 ± 0.000006
recip semi-major axis [10-6 au-1] -290.66 ± 0.49
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