C/1954 Y1 Haro-Chavira
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Comet C/1954 Y1 was discovered on 18 December 1954, about one year before perihelion passage, and was last seen on 15 May 1958 [Kronk, Cometography: Volume 4].
The comet made its closest approach to the Earth on 9 December 1955 (3.51 au), almost seven weeks before perihelion passage.
Solution given here is based on data spanning over 3.3 yr in a range of heliocentric distances: 5.16 au – 4.08 au (perihelion) – 7.79 au.
This Oort spike comet suffers small planetary perturbations during its passage through the planetary system that lead to escape the comet from the solar system on a hyperbolic orbit (see future barycentric orbit).
See also Królikowska and Dybczyński 2017.
The comet made its closest approach to the Earth on 9 December 1955 (3.51 au), almost seven weeks before perihelion passage.
Solution given here is based on data spanning over 3.3 yr in a range of heliocentric distances: 5.16 au – 4.08 au (perihelion) – 7.79 au.
This Oort spike comet suffers small planetary perturbations during its passage through the planetary system that lead to escape the comet from the solar system on a hyperbolic orbit (see future barycentric orbit).
See also Królikowska and Dybczyński 2017.
| solution description | ||
|---|---|---|
| number of observations | 97 | |
| data interval | 1955 01 13 – 1958 05 15 | |
| data type | perihelion within the observation arc (FULL) | |
| data arc selection | entire data set (STD) | |
| range of heliocentric distances | 5.16 au – 4.08 au (perihelion) – 7.79 au | |
| detectability of NG effects in the comet's motion | NG effects not determinable | |
| type of model of motion | GR - gravitational orbit | |
| data weighting | YES | |
| number of residuals | 181 | |
| RMS [arcseconds] | 0.98 | |
| orbit quality class | 1a | |
| orbital elements (heliocentric ecliptic J2000) | ||
|---|---|---|
| Epoch | 1956 01 08 | |
| perihelion date | 1956 01 26.66512601 | ± 0.00079697 |
| perihelion distance [au] | 4.07687153 | ± 0.00000441 |
| eccentricity | 1.00466934 | ± 0.00001072 |
| argument of perihelion [°] | 57.297597 | ± 0.000103 |
| ascending node [°] | 72.872267 | ± 0.000037 |
| inclination [°] | 79.599992 | ± 0.000048 |
| reciprocal semi-major axis [10-6 au-1] | -1,145.32 | ± 2.63 |
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.