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
previous orbit elements (barycentric ecliptic J2000)
no. of returning VCs in the swarm 728
no. of escaping VCs in the swarm 4273 *
no. of hyperbolas among escaping VCs in the swarm 367
previous recip semi-major axis [10-6 au-1] 9.56 ± 6.65
previous perihelion distance [au] 103.175 – 348.47 – 685.333 R
previous aphelion distance [103 au] 84.5 – 105.2 – 119.4 R
time interval to previous perihelion [Myr] 8.492 – 11.684 – 13.954 R
percentage of VCs with q > 20100
dynamical status definitely dynamically new (DN+)
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