C/2011 J2 LINEAR
more info
Comet C/2011 J2 was discovered on 4 May 2011 by LINEAR, that is about 2.6 yr before its perihelion passage. Next, it was found on earlier images taken on 10 and 25 March 2011 with the Catalina Sky Survey. More than seven months after perihelion passage (in August 2014), splitting event was observed. In 2016, Manzini et al., investigated the motion of fragment B over the observation period and they showed that the first breakout event likely occurred between 12 July and 30 July 2014. Therefore, solutions given here are based on data-arc including measurements taken well before this fragmentation event. The comet was observed until 15 September 2017.
Comet had its closest approach to the Earth (3.02 au) a few days before perihelion passage.
Solutions given here was based on data spanning over 3.3 yr in a range of heliocentric distances: 8.97 au – 3.44 au (perihelion) – 3.84 au.
This Oort spike comet suffers tiny planetary perturbations during its passage through the planetary system. The future orbit is uncertain due to splitting event.

solution description
number of observations 3369
data interval 2011 03 10 – 2014 06 28
data arc selection data generally limited to pre-perihelion (PRE)
range of heliocentric distances 8.97 au – 3.44 au (perihelion) – 3.84 au
type of model of motion NC - non-gravitational orbits for symmetric CO-g(r)-like function
data weighting YES
number of residuals 6687
RMS [arcseconds] 0.35
orbit quality class 1a+
orbital elements (heliocentric ecliptic J2000)
Epoch 2013 12 14
perihelion date 2013 12 25.28704154 ± 0.00020196
perihelion distance [au] 3.44341220 ± 0.00000063
eccentricity 1.00047421 ± 0.00000132
argument of perihelion [°] 85.291894 ± 0.000043
ascending node [°] 163.947352 ± 0.000007
inclination [°] 122.79889 ± 0.000003
recip semi-major axis [10-6 au-1] -137.72 ± 0.38
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.
non-gravitational parameters
A1 [10-8au/day2] 1.7508 ± 0.0306
A2 [10-8au/day2] 0.49237 ± 0.04139
A3 [10-8au/day2] 0.11562 ± 0.01023
m -2.00
n 3.000
k -2.6000
r0 [au] 10.000
α 0.0100