C/1976 D2 Shuster
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Comet C/1976 D2 was discovered on 25 February 1976, 1.1 yr after perihelion passage, and was last seen on 7 April 1978 [Kronk and Meyer, Cometography: Volume 5].
The comet made its closest approach to the Earth on 3 April 1975 (5.957 au), eleven months before discovery (2.6 months after perihelion passage), and at the moment of discovery it was approaching the next opposition (minimal distance of 6.70 au to the Earth).
Solution given here is based on data spanning over 2.11 yr in a range of heliocentric distances from 7.37 au to 10.13 au.
This Oort spike comet suffers insignificant planetary perturbations during its passage through the planetary system (see original and future orbits).
See also Królikowska 2014 and Królikowska and Dybczyński 2017.
The comet made its closest approach to the Earth on 3 April 1975 (5.957 au), eleven months before discovery (2.6 months after perihelion passage), and at the moment of discovery it was approaching the next opposition (minimal distance of 6.70 au to the Earth).
Solution given here is based on data spanning over 2.11 yr in a range of heliocentric distances from 7.37 au to 10.13 au.
This Oort spike comet suffers insignificant planetary perturbations during its passage through the planetary system (see original and future orbits).
See also Królikowska 2014 and Królikowska and Dybczyński 2017.
| solution description | ||
|---|---|---|
| number of observations | 57 | |
| data interval | 1976 02 25 – 1978 04 07 | |
| data type | observed only after perihelion (POST) | |
| data arc selection | entire data set (STD) | |
| range of heliocentric distances | 7.37 au – 10.1au | |
| 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 | 111 | |
| RMS [arcseconds] | 1.00 | |
| orbit quality class | 1a | |
| next 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 | |
| next reciprocal semi-major axis [10-6 au-1] | 44.07 – 54.12 – 64.13 | |
| next perihelion distance [au] | 13 – 17 – 24 | |
| next aphelion distance [103 au] | 31 – 37 – 45 | |
| time interval to next perihelion [Myr] | 2 – 2.5 – 3.4 | |
| percentage of VCs with 10 < qnext < 20 | 78 | |
| percentage of VCs with qnext > 20 | 22 | |
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.
| next 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 | |
| next reciprocal semi-major axis [10-6 au-1] | 44.57 – 54.12 – 63.48 | |
| next perihelion distance [au] | 8.2 – 9.3 – 12 | |
| next aphelion distance [103 au] | 31 – 37 – 45 | |
| time interval to next perihelion [Myr] | 2 – 2.5 – 3.3 | |
| percentage of VCs with qnext < 10 | 66 | |
| percentage of VCs with 10 < qnext < 20 | 33 | |
| percentage of VCs with qnext > 20 | 1 | |