C/1999 J2 LINEAR
more info
C/1999 J2 was discovered by B. Skiff of Lowell Observatory Near-Earth Object Search (LONEOS) team on 13 May 1999, 0.92 yr before perihelion passage.
This comet made its closest approach to the Earth on 11 May 2000 (6.515 au), about one month after perihelion.
Solution given here is based on data spanning over 4.1 yr in a range of heliocentric distances: 7.42 au – 7.110 au (perihelion) – 10.1 au.
This Oort spike comet suffers small planetary perturbations during its passage through the planetary system that lead to escape of the comet from the solar system on hiperbolic orbit (see future barycentric orbit).
See also Królikowska 2014 and Królikowska and Dybczyński 2017.

solution description
number of observations 1001
data interval 1999 05 12 – 2003 05 29
data type perihelion within the observation arc (FULL)
data arc selection entire data set (STD)
range of heliocentric distances 7.42 au – 7.11 au (perihelion) – 10.1 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 1974
RMS [arcseconds] 0.53
orbit quality class 1a+
orbital elements (heliocentric ecliptic J2000)
Epoch 2000 04 06
perihelion date 2000 04 06.00425500 ± 0.00091200
perihelion distance [au] 7.10975456 ± 0.00000468
eccentricity 1.00103030 ± 0.00000456
argument of perihelion [°] 127.140062 ± 0.000063
ascending node [°] 50.042583 ± 0.000012
inclination [°] 86.412706 ± 0.000009
recip semi-major axis [10-6 au-1] -144.91 ± 0.64
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