C/2004 P1 NEAT
more info
C/2004 P1 was discovered on 5 August 2004 by the LINEAR as a faint diffuse comet. In the following days, its cometary apperance was confirmed [IAUC 8383, 2004 August 8]. Later, three pre-discovery detections by AMOS were found (11 May 2003, and 8, 21 July 2003). At the moment of discovery, it was one year after its perihelion passage (see figure).
This comet made its closest approach to the Earth on 20 July 2003 (5.233 au), 19 days before perihelion.
Solution given here is based on data spanning over 2.3 yr in a range of heliocentric distances: 6.05 au – 6.014 au (perihelion) – 7.91 au.
This Oort spike comet suffers small planetary perturbations during its passage through the planetary system that lead to escape of the comet from the solar system on hiperbolic orbit (see future barycentric orbit).
See also Królikowska 2014 and Królikowska and Dybczyński 2017.

solution description
number of observations 151
data interval 2003 05 11 – 2005 08 30
data type significantly more measurements after perihelion (POST+)
data arc selection entire data set (STD)
range of heliocentric distances 6.05 au – 6.01 au (perihelion) – 7.91 au
detectability of NG effects in the comet's motion NG effects not determinable
type of model of motion GR - gravitational orbit
data weighting YES
number of residuals 298
RMS [arcseconds] 0.63
orbit quality class 1a
orbital elements (heliocentric ecliptic J2000)
Epoch 2003 07 20
perihelion date 2003 08 08.92381300 ± 0.00633200
perihelion distance [au] 6.01409659 ± 0.00003034
eccentricity 0.99873180 ± 0.00001857
argument of perihelion [°] 16.596434 ± 0.000685
ascending node [°] 284.193932 ± 0.000238
inclination [°] 28.823571 ± 0.000094
recip semi-major axis [10-6 au-1] 210.87 ± 3.09
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