C/2000 H1 LINEAR

Solar System
Dynamics &
Planetology
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C/2000 H1 LINEAR

General description

Comet C/2000 H1 was discovered three months after perihelion passage and next observed up to one year in a range of heliocentric distances from 3.72 au to 5.35 au. However, the observations are distributed highly uniformly in this period – there is a ten-month gap between 28 June 2000 and 24 April 2001.

Comet had its closest approach to Earth on 19 May 2000 (3.385 au).

Figure caption: 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.

SSDP Cometary Note C2000H1A5-001

Comet C/2000 H1 LINEAR

number of observations	116
number of residuals	228
data interval	2000 Apr. 26 — 2001 Apr. 25
rms [arcsec]	0.60
orbit quality class	2a

Osculating orbital elements (heliocentric; ecliptic J2000.0)

Epoch (TT)	20000117.0	= JD 2451560.5
time of perihelion passage (TT)	20000129.258233	± 0.006807
perihelion distance	3.63810255	± 0.00004586
eccentricity	1.00177488	± 0.00014145
argument of perihelion [deg]	78.870414	± 0.000827
longitude of the ascending node [deg]	356.439823	± 0.000254
inclination [deg]	118.237137	± 0.000108
inverse semimajor axis [10^-6 au^-1]	-487.86	± 38.87

Note: Epoch is given in a format: yyyymmdd.d, time of perihelion passage in a format of yyyymmdd.dddddd.

Figure caption: Six 2D-projections of the 6D space of original swarm (5001 VCs) of C/2000 H1. Each density map is given in logarithmic scale presented on the right in the individual panel. Notice large dispersion of these VCs (poor quality orbit).
The same figure in the new window

Original orbital elements (barycentric; at 250 au from the Sun)

Epoch (TT)	16960728
time of perihelion passage (TT)	20000126.873179	± 0.008108
perihelion distance	3.64438682	± 0.00004065
eccentricity	0.99978811	± 0.00013895
argument of perihelion [deg]	78.572883	± 0.000974
longitude of the ascending node [deg]	356.430616	± 0.000245
inclination [deg]	118.232361	± 0.000038
inverse semimajor axis [10^-6 au^-1]	58.14	± 38.13

Note: Values of uncertainties of original/future orbital elements were derived using a swarm of 5001 osculating orbits of VCs (including the nominal osculating orbit given above) for original/future orbital evolution calclulations and then by fitting the distribution of a given orbital element of original/future swarm of VCs to Gaussian distribution.

Original barycentric positions and velocities of 5001 VCs at 250 au from the Sun are given here (data format), i.e. before entering the planetary zone.

Figure caption: Six 2D-projections of the 6D space of future swarm (5001 VCs) of C/2000 H1. Each density map is given in logarithmic scale presented on the right in the individual panel. Notice large dispersion of these VCs (poor quality orbit).
The same figure in the new window

Future orbital elements (barycentric; at 250 au from the Sun)

Epoch (TT)	23060113
time of perihelion passage (TT)	20000128.168006	± 0.006351
perihelion distance	3.63890839	± 0.00004619
eccentricity	0.99901832	± 0.00014000
argument of perihelion [deg]	78.800614	± 0.000827
longitude of the ascending node [deg]	356.501115	± 0.000262
inclination [deg]	118.289374	± 0.000111
inverse semimajor axis [10^-6 au^-1]	269.77	± 38.48