C/2010 H1 Garradd
more info
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 (heliocentric ecliptic J2000)
Epoch 2010 05 24
perihelion date 2010 06 18.89555511 ± 0.00827505
perihelion distance [au] 2.74557120 ± 0.00004409
eccentricity 0.99966734 ± 0.00001874
argument of perihelion [°] 233.818612 ± 0.002973
ascending node [°] 347.384152 ± 0.000281
inclination [°] 36.531806 ± 0.000405
recip semi-major axis [10-6 au-1] 121.16 ± 6.83
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