C/2015 K7
more info
Comet C/2015 K7 was discovered on 17 May 2015 with the Subaru Telescope (Maunakea), that is more than two years after its perihelion passage. Fortunately, many pre-discoveries measurements were next found going back to 9 March 2013 (about two weeks after perihelion passage).
Thus, the GR solution given here is based on post-perihelion data span over 2.21 yr in a range of heliocentric distances from 9.94 au to 10.90 au.
Comet had its closest approach to the Earth on 30 May 2013 (8.94 au), about 3 months after its perihelion passage.
This Oort spike comet suffers tiny planetary perturbations during its passage through the planetary system that lead to a more tight future orbit (semimajor axis of about 6,700 au).
Thus, the GR solution given here is based on post-perihelion data span over 2.21 yr in a range of heliocentric distances from 9.94 au to 10.90 au.
Comet had its closest approach to the Earth on 30 May 2013 (8.94 au), about 3 months after its perihelion passage.
This Oort spike comet suffers tiny planetary perturbations during its passage through the planetary system that lead to a more tight future orbit (semimajor axis of about 6,700 au).
| solution description | ||
|---|---|---|
| number of observations | 59 | |
| data interval | 2013 03 09 – 2015 05 26 | |
| data type | observed only after perihelion (POST) | |
| data arc selection | entire data set (STD) | |
| range of heliocentric distances | 9.94 au – 10.9au | |
| 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 | 118 | |
| RMS [arcseconds] | 0.26 | |
| 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] | 76.07 – 78.58 – 81.04 | |
| previous perihelion distance [au] | 10.9 – 11 – 11.1 | |
| previous aphelion distance [103 au] | 24.7 – 25.4 – 26.3 | |
| time interval to previous perihelion [Myr] | 1.37 – 1.44 – 1.51 | |
| percentage of VCs with 10 < qprev < 20 | 100 | |
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_g 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] | 76.06 – 78.55 – 81.01 | |
| previous perihelion distance [au] | 10.6 – 10.67 – 10.76 | |
| previous aphelion distance [103 au] | 24.7 – 25.5 – 26.3 | |
| time interval to previous perihelion [Myr] | 1.37 – 1.44 – 1.51 | |
| percentage of VCs with 10 < qprev < 20 | 100 | |