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+ | |
| orbital elements (heliocentric ecliptic J2000) | ||
|---|---|---|
| Epoch | 2025 05 05 | |
| perihelion date | 2028 05 19.80678028 | ± 0.06657888 |
| perihelion distance [au] | 14.11960764 | ± 0.00034112 |
| eccentricity | 1.00304045 | ± 0.00007332 |
| argument of perihelion [°] | 185.885372 | ± 0.002110 |
| ascending node [°] | 312.897697 | ± 0.000038 |
| inclination [°] | 84.466515 | ± 0.000056 |
| reciprocal semi-major axis [10-6 au-1] | -215.34 | ± 5.16 |
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.