C/2010 H1 Garradd
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Comet C/2010 H1 was discovered on 16 April 2010 by Gordon J. Garradd (Siding Spring Survey); that is about 2 months before its perihelion passage. A few pre-discovery images of this comet taken on 19 February 2010 during Siding Spring Survey were found. The comet was observed until 2 July 2010.
Comet had its closest approach to the Earth on 9 April 2010 (1.924 au), about a week before its discovery.
Solution given here is based on data spanning over 0.375 yr in a narrow range of heliocentric distances: 3.01 au – 2.746 au (perihelion) – 2.75 au.
This Oort spike comet suffers moderate planetary perturbations during its passage through the planetary system, these perturbations lead to a more tight future orbit of about 1,800 au.
See also Królikowska and Dybczyński 2013 and Królikowska 2020.

solution description
number of observations 51
data interval 2010 02 19 – 2010 07 02
data type perihelion within the observation arc (FULL)
data arc selection entire data set (STD)
range of heliocentric distances 3.01 au – 2.75 au (perihelion) – 2.75 au
detectability of NG effects in the comet's motion NG effects not determinable
type of model of motion GR - gravitational orbit
data weighting NO
number of residuals 86
RMS [arcseconds] 0.62
orbit quality class 2b
orbital elements (barycentric ecliptic J2000)
Epoch 2318 03 31
perihelion date 2010 06 19.77197346 ± 0.00819085
perihelion distance [au] 2.74093201 ± 0.00004332
eccentricity 0.99848483 ± 0.00001860
argument of perihelion [°] 233.764464 ± 0.002954
ascending node [°] 347.339475 ± 0.000283
inclination [°] 36.505432 ± 0.000399
recip semi-major axis [10-6 au-1] 552.79 ± 6.79
file containing 5001 VCs swarm
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
Six 2D-projections of the 6D space of future swarm including 5001 VCs. Each density map is given in logarithmic scale presented on the right in the individual panel.