C/2004 B1 LINEAR
more info
Comet C/2004 B1 was discovered on 29 January 2004 with Lincoln Laboratory Near-Earth Asteroid Research project; that is more than 2 years before its perihelion passage. A few pre-discovery images taken a day before discovery were found at Haleakala-AMOS. It was observed until 24 August 2008 (see picture).
Comet had its closest approach to the Earth on 21 May 2006 (1.345 au), about 3.5 months after its perihelion passage.
Solutions given here are based on data spanning over 4.57 yr in a range of heliocentric distances: 7.74 au – 1.602 au (perihelion) – 9.15 au
This Oort spike comet suffers moderate planetary perturbations during its passage through the planetary system; these perturbations lead to escape the comet from the planetary zone on a hyperbolic orbit (see future barycentric orbits).
See also Królikowska 2020

solution description
number of observations 2034
data interval 2004 01 28 – 2008 08 24
data type perihelion within the observation arc (FULL)
data arc selection entire data set (STD)
range of heliocentric distances 7.74 au – 1.60 au (perihelion) – 9.15 au
type of model of motion NS - non-gravitational orbits for standard g(r)
data weighting YES
number of residuals 3977
RMS [arcseconds] 0.44
orbit quality class 1a+
orbital elements (heliocentric ecliptic J2000)
Epoch 2006 01 25
perihelion date 2006 02 07.88713822 ± 0.00003179
perihelion distance [au] 1.60192865 ± 0.00000037
eccentricity 1.00127194 ± 0.00000110
argument of perihelion [°] 327.899942 ± 0.000010
ascending node [°] 272.801928 ± 0.000007
inclination [°] 114.096786 ± 0.00001
recip semi-major axis [10-6 au-1] -794.00 ± 0.69
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
non-gravitational parameters
A1 [10-8au\day-2] 0.8796 ± 0.03187
A2 [10-8au\day-2] -0.32905 ± 0.01724
A3 [10-8au\day-2] -0.21566 ± 0.00726
m -2.15
n 5.093
k -4.6142
r0 [au] 2.808
α 0.1113