120P/Mueller, also known as Mueller 1, is a periodic comet in the Solar System. It last came to perihelion in May 2021[1] and underwent a 1.4 magnitude outburst in August 2021,[4] (3m 1d after perihelion).
| Discovery | |
|---|---|
| Discovered by | Jean Mueller |
| Discovery date | October 18, 1987 |
| Designations | |
| 1987 XXXI; 1995 O2 | |
| Orbital characteristics | |
| Epoch | 2022-01-21 |
| Aphelion | 5.448 AU |
| Perihelion | 2.478 AU |
| Semi-major axis | 3.963 AU |
| Eccentricity | 0.3746 |
| Orbital period | 7.88 yr |
| Inclination | 8.4899° |
| Last perihelion | May 7, 2021[1] February 22, 2013[2] September 30, 2004 |
| Next perihelion | 2029-Apr-05[3] |
| Numbered comets | ||
|---|---|---|
| Previous 119P/Parker–Hartley |
120P/Mueller | Next 121P/Shoemaker–Holt |
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