C/2007 Q1 Garradd
more info
Comet C/2007 Q1 was discovered on 21 August 2007 by G. J. Garradd (Siding Spring Survey), that is about eight months after perihelion passage (q=3.017 au) and observed only about three weeks in the narrow range of heliocentric distance from 3.88 au to 4.02 au (very poor quality orbit).
Comet had its closest approach to the Earth on 11 September 2007 (3.093 au), about 3 weeks after its discovery and about 9 months after its perihelion passage.
This probably Oort spike comet suffers moderate planetary perturbations during its passage through the planetary system and these perturbations lead to escape the comet from the solar system on hyperbolic orbit (see future barycentric orbit).
See also Królikowska and Dybczyński 2013 and Królikowska 2020.

solution description
number of observations 43
data interval 2007 08 21 – 2007 09 14
data type observed only after perihelion (POST)
data arc selection entire data set (STD)
range of heliocentric distances 3.88 au – 4.02au
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 84
RMS [arcseconds] 0.58
orbit quality class 3a
orbital elements (heliocentric ecliptic J2000)
Epoch 2006 12 11
perihelion date 2006 12 11.84150604 ± 0.75334299
perihelion distance [au] 3.00637873 ± 0.02053678
eccentricity 1.00306045 ± 0.00223242
argument of perihelion [°] 282.566809 ± 0.525540
ascending node [°] 5.833680 ± 0.066746
inclination [°] 82.22274 ± 0.24352
reciprocal semi-major axis [10-6 au-1] -1,017.98 ± 732.72
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.