C/2017 AB5 PANSTARRS
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Comet C/2017 AB5 was discovered on 3 January 2017 with Pan-STARRS 1 telescope (Haleakala), that is more than a year before its perihelion passage. This comet was rather rarely observed until 25 April 2019.
Comet had its closest approach to the Earth on 18 January 2018 (8.395 au), about a month before its perihelion passage.
The preferred solution given here is based on data spanning over 2.31 yr in a range of heliocentric distances: 9.50 au – 9.22 au (perihelion) – 9.53 au.
This Oort spike comet suffers small planetary perturbations during its passage through the planetary system and will have a bit more tight future orbit (see future barycentric orbit).
Comet had its closest approach to the Earth on 18 January 2018 (8.395 au), about a month before its perihelion passage.
The preferred solution given here is based on data spanning over 2.31 yr in a range of heliocentric distances: 9.50 au – 9.22 au (perihelion) – 9.53 au.
This Oort spike comet suffers small planetary perturbations during its passage through the planetary system and will have a bit more tight future orbit (see future barycentric orbit).
| solution description | ||
|---|---|---|
| number of observations | 69 | |
| data interval | 2017 01 03 – 2018 04 18 | |
| data type | perihelion within the observation arc (FULL) | |
| data arc selection | entire data set (STD) | |
| range of heliocentric distances | 9.5 au – 9.22 au (perihelion) – 9.22 au | |
| detectability of NG effects in the comet's motion | NG effects not determinable | |
| type of model of motion | GR - gravitational orbit | |
| data weighting | NO | |
| number of residuals | 130 | |
| RMS [arcseconds] | 0.33 | |
| orbit quality class | 1a | |
| previous orbit statistics, both Galactic and stellar perturbations were taken into account | ||
|---|---|---|
| no. of returning VCs in the swarm | 5001 | * |
| no. of escaping VCs in the swarm | 0 | |
| no. of hyperbolas among escaping VCs in the swarm | 0 | |
| previous reciprocal semi-major axis [10-6 au-1] | 56.26 – 61.46 – 66.42 | |
| previous perihelion distance [au] | 14.2 – 15.6 – 17.3 | |
| previous aphelion distance [103 au] | 30.1 – 32.5 – 35.5 | |
| time interval to previous perihelion [Myr] | 1.8 – 2.1 – 2.4 | |
| percentage of VCs with 10 < qprev < 20 | 96 | |
| percentage of VCs with qprev > 20 | 4 | |
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.
| previous orbit statistics, here only the Galactic tide has been included | ||
|---|---|---|
| no. of returning VCs in the swarm | 5001 | * |
| no. of escaping VCs in the swarm | 0 | |
| no. of hyperbolas among escaping VCs in the swarm | 0 | |
| previous reciprocal semi-major axis [10-6 au-1] | 56.29 – 61.51 – 66.47 | |
| previous perihelion distance [au] | 11.6 – 12.4 – 13.7 | |
| previous aphelion distance [103 au] | 30.1 – 32.5 – 35.5 | |
| time interval to previous perihelion [Myr] | 1.8 – 2.1 – 2.4 | |
| percentage of VCs with 10 < qprev < 20 | 100 | |