C/2000 SV74 | CODEC

C/2000 SV74 LINEAR

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/a_origin = +0.000074, 1/a_future = -0.000073).

See also Królikowska and Dones 2023 and Królikowska and Dybczyński 2017.

2000sva5 2000svn8 2000svc8 2000svbs 2000svpa 2000svpn 2000svqc 2000svqs 2000svra 2000svr2 2000svr3

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	NC - non-gravitational orbits for symmetric CO-g(r)-like function
data weighting	YES
number of residuals	2879
RMS [arcseconds]	0.65
orbit quality class	1a

next orbit statistics, both Galactic and stellar perturbations were taken into account
no. of returning VCs in the swarm	0
no. of escaping VCs in the swarm	5001
no. of hyperbolas among escaping VCs in the swarm	5001	*
next reciprocal semi-major axis [10^-6 au^-1]	-96.35 – -92.62 – -88.85
next perihelion distance [au]	225 – 229 – 233
synchronous stop epoch [Myr]	1.51	S
percentage of VCs with q_next > 20	100

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).

next orbit statistics, here only the Galactic tide has been included
no. of returning VCs in the swarm	0
no. of escaping VCs in the swarm	5001
no. of hyperbolas among escaping VCs in the swarm	5001	*
next reciprocal semi-major axis [10^-6 au^-1]	-100.04 – -96.26 – -92.43
next perihelion distance [au]	0.1143 – 0.115 – 0.1181
synchronous stop epoch [Myr]	1.59	S
percentage of VCs with q_next < 10	100