C/2000 SV74 LINEAR
more info
Comet C/2000 SV74 was discovered on 24 September 2009 by LINEAR as an apparently asteroidal object; CCD images taken by Milos Tichy (Klet Observatory) on 19 October 2000 revealed a cometary appearance [[IAUC 7510, 2000 October 19]. Later, five images of this object were found on LINEAR exposures taken on 5 September 2000. Comet passed perihelion at the end of April 2002.

C/2000 SV74 was observed 4.7 yr in a range of heliocentric distances: 6.26 au – 3.542 au (perihelion) – 9.51 au.

Comet had its closest approach to Earth on 3 November 2001 (3.195 au, six months before perihelion).

Nongravitational solution bbased on entire data arc still reveals some trends in (O-C) where most evident are in the last opposition; NG orbits independently using pre-perihelion and post-perihelion data are also determinable.

Nakano non-gravitational solution [ Nakano Notes 1258] also shows trends in (O-C) in the last opposition. This solution, derived by T. Kobayashi, is based on 2116 observations (arc: 2000 September 5 to 2005 April 15; rms = 0.60 arcsec) and the NG-effects of sublimating CO-molecule (or N2) using Yabushita's theory (MNRAS 283, 347), and gives 1/aorigin = +0.000074, 1/afuture = -0.000073).

See also Królikowska and Dones 2023 and Królikowska and Dybczyński 2017.
solution description
number of observations 1450
data interval 2002 05 02 – 2005 05 12
data arc selection data generally limited to post-perihelion (POS)
range of heliocentric distances 3.54 au – 9.51au
type of model of motion NS - non-gravitational orbits for standard g(r)
data weighting YES
number of residuals 2879
RMS [arcseconds] 0.68
orbit quality class 1a
orbital elements (barycentric ecliptic J2000)
Epoch 2304 04 13
perihelion date 2002 04 29.66057818 ± 0.00045587
perihelion distance [au] 3.53674533 ± 0.00000402
eccentricity 1.00020375 ± 0.00000291
argument of perihelion [°] 76.072683 ± 0.000095
ascending node [°] 24.187997 ± 0.000016
inclination [°] 75.352433 ± 0.000015
reciprocal semi-major axis [10-6 au-1] -57.61 ± 0.82
file containing 5001 VCs swarm
2000svr2.bpl
Upper panel: 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.
Middle panel(s): O-C diagram for a given solution (sometimes in comparison to another solution available in CODE), where residuals in right ascension are shown using magenta dots and in declination by blue open circles.
Lowest panel: Relative weights for a given data set(s).
Six 2D-projections of the 6D space of future swarm including 5001 VCs. Each density map is given in logarithmic scale presented on the right in the individual panel.