C/2007 Q1 Garradd

Solar System
Dynamics &
Planetology
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C/2007 Q1 Garradd

General description

Comet C/2007 Q1 was discovered about eight months after perihelion passage (q=3.0 au) and observed only about three weeks in the narrow range of heliocentric distance from 3.88 au to 4.02 au (very poor quality orbit).

More details in Królikowska and Dybczyński, 2013.

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 C2007Q1A1-001

Comet C/2007 Q1 Garradd

number of observations	43
number of residuals	84
data interval	2007 Aug. 21 — 2007 Sep. 14
rms [arcsec]	0.58
orbit quality class	3a

Osculating orbital elements (heliocentric; ecliptic J2000.0)

Epoch (TT)	20061211.0	= JD 2454080.5
time of perihelion passage (TT)	20061211.841512	± 0.753344
perihelion distance	3.00637895	± 0.02053679
eccentricity	1.00306045	± 0.00223242
argument of perihelion[deg]	282.566815	± 0.525540
longitude of the ascending node [deg]	5.833679	± 0.066746
inclination[deg]	82.222742	± 0.243520
inverse semimajor axis [10^-6 au^-1]	-1017.99	± 732.72

Note: Epoch is given in a format: yyyymmdd.d, time of perihelion passage in a format of yyyymmdd.dddddd.
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/2007 Q1. 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)	17040727.0
time of perihelion passage (TT)	20061211.984218	± 0.694117
perihelion distance	3.01650403	± 0.02069708
eccentricity	0.99983424	± 0.00241171
argument of perihelion[deg]	282.426335	± 0.527673
longitude of the ascending node [deg]	5.878485	± 0.068635
inclination[deg]	82.334247	± 0.235705
inverse semimajor axis [10^-6 au^-1]	54.95	± 799.09

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.

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

Epoch (TT)	23030817.0
time of perihelion passage (TT)	20061212.417182	± 0.748111
perihelion distance	3.00394882	± 0.02076606
eccentricity	1.00135141	± 0.00223885
argument of perihelion[deg]	282.497814	± 0.531405
longitude of the ascending node [deg]	5.889648	± 0.067334
inclination[deg]	82.243545	± 0.245798
inverse semimajor axis [10^-6 au^-1]	-449.88	± 741.43