C/2025 D1 Groeller
more info
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 (barycentric ecliptic J2000) | ||
|---|---|---|
| Epoch | 1707 08 21 | |
| perihelion date | 2028 05 25.83180312 | ± 0.06737567 |
| perihelion distance [au] | 14.10875006 | ± 0.00034470 |
| eccentricity | 0.99959460 | ± 0.00007345 |
| argument of perihelion [°] | 186.058707 | ± 0.002140 |
| ascending node [°] | 312.910882 | ± 0.000038 |
| inclination [°] | 84.505076 | ± 0.000056 |
| reciprocal semi-major axis [10-6 au-1] | 28.73 | ± 5.21 |
| file containing 5001 VCs swarm |
|---|
| 2025d1a1.bmi |
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.
Six 2D-projections of the 6D space of original swarm including 5001 VCs. Each density map is given in logarithmic scale presented on the right in the individual panel.