C/2012 J1 Catalina
more info
Comet C/2012 J1 was discovered on 13 May 2012 with Catalina Sky Survey, that is about 7 months before its perihelion passage. It was systematically observed less than 2 years, exept 5 months interval between 21 March and 12 August 2012.
Comet had its closest approach to the Earth on 15 October 2012 (2.332 au), five months after its discovery and less than two months before perihelion passage.
Solution given here is based on data spanning over 1.85 yr in a range of heliocentric distances: 3.73 au – 3.159 au (perihelion) – 5.33 au.
This comet have orignal semimajor axis shorter than 10,000 au.
C/2012 J1 suffers moderate 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).

solution description
number of observations 4406
data interval 2012 05 13 – 2014 03 21
data type perihelion within the observation arc (FULL)
data arc selection entire data set (STD)
range of heliocentric distances 3.73 au – 3.16 au (perihelion) – 5.33 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 8690
RMS [arcseconds] 0.26
orbit quality class 1a
orbital elements (heliocentric ecliptic J2000)
Epoch 2012 12 19
perihelion date 2012 12 07.24048867 ± 0.00006091
perihelion distance [au] 3.15871103 ± 0.00000034
eccentricity 1.00142937 ± 0.00000055
argument of perihelion [°] 147.274110 ± 0.000015
ascending node [°] 235.217257 ± 0.000004
inclination [°] 34.18598 ± 0.000003
recip semi-major axis [10-6 au-1] -452.52 ± 0.17
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