C/2025 D1 Groeller
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Comet C/2025 D1 was discovered on 20 February 2025 by Kitt Peak-Bok, that is more than three years before its perihelion passage. Soon, the prediscovery images of this comet were found going back to June 2018.
Comet had a perihelion distance well beyond the orbit of Saturn (14.1 au) and will pass the perihelion in May 2028; the closest approach to the Earth will be on 3 February 2028 (13.14 au), that is about 2.5 months before its perihelion passage.
GR solution given here is based on pre-perihelion data span over 6.72 yr in a range of heliocentric distances from 21.31 au to 15.11 au.
This is an Oort spike comet.
Comet had a perihelion distance well beyond the orbit of Saturn (14.1 au) and will pass the perihelion in May 2028; the closest approach to the Earth will be on 3 February 2028 (13.14 au), that is about 2.5 months before its perihelion passage.
GR solution given here is based on pre-perihelion data span over 6.72 yr in a range of heliocentric distances from 21.31 au to 15.11 au.
This is an Oort spike comet.
| solution description | ||
|---|---|---|
| number of observations | 34 | |
| data interval | 2018 06 06 – 2025 02 22 | |
| data type | perihelion within the observation arc (FULL) | |
| data arc selection | entire data set (STD) | |
| range of heliocentric distances | 21.31 au – 15.11au | |
| detectability of NG effects in the comet's motion | comet with determinable NG~orbit | |
| type of model of motion | GR - gravitational orbit | |
| data weighting | YES | |
| number of residuals | 65 | |
| RMS [arcseconds] | 0.32 | |
| orbit quality class | 1a+ | |
| previous orbit statistics, both Galactic and stellar perturbations were taken into account | ||
|---|---|---|
| no. of returning VCs in the swarm | 4981 | * |
| no. of escaping VCs in the swarm | 20 | |
| no. of hyperbolas among escaping VCs in the swarm | 0 | |
| previous reciprocal semi-major axis [10-6 au-1] | 22.02 – 28.54 – 34.59 | R |
| previous perihelion distance [au] | 1200 – 2000 – 3200 | R |
| previous aphelion distance [103 au] | 57 – 68 – 88 | R |
| time interval to previous perihelion [Myr] | 4.7 – 6.3 – 9.1 | R |
| percentage of VCs with 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 | 4964 | * |
| no. of escaping VCs in the swarm | 37 | |
| no. of hyperbolas among escaping VCs in the swarm | 0 | |
| previous reciprocal semi-major axis [10-6 au-1] | 22.17 – 28.66 – 35.33 | R |
| previous perihelion distance [au] | 15 – 36 – 190 | R |
| previous aphelion distance [103 au] | 57 – 70 – 90 | R |
| time interval to previous perihelion [Myr] | 4.7 – 6.4 – 9.4 | R |
| percentage of VCs with 10 < qprev < 20 | 25 | |
| percentage of VCs with qprev > 20 | 75 | |