259P/Garradd
< 259P
Comet 259P/Garradd in two different dates, one that was active (left) and one in which it appears inactive (right) | |
| Discovery | |
|---|---|
| Discovered by | Gordon J. Garradd |
| Discovery site | Siding Spring Observatory |
| Discovery date | 2 September 2008 |
| Designations | |
| P/2008 R1 | |
| Garradd 4 | |
| Orbital characteristics | |
| Epoch | 26 July 2017 (JD 2457960.5) |
| Observation arc | 9.05 years |
| Number of observations | 68 |
| Aphelion | 3.654 AU |
| Perihelion | 1.809 AU |
| Semi-major axis | 2.731 AU |
| Eccentricity | 0.33771 |
| Orbital period | 4.514 years |
| Inclination | 15.889° |
| 51.484° | |
| Argument of periapsis | 257.50° |
| Mean anomaly | 358.03° |
| Last perihelion | 8 February 2022 |
| Next perihelion | 11 August 2026 |
| TJupiter | 3.217 |
| Earth MOID | 0.858 AU |
| Jupiter MOID | 1.925 AU |
| Physical characteristics | |
Mean radius | 0.30±0.02 km |
| 0.05 (assumed) | |
| Comet total magnitude (M1) | 13.7 |
| Comet nuclear magnitude (M2) | 18.9 |
259P/Garradd is a Jupiter-family comet and active asteroid with an orbital period of 4.5 years. It was discovered in images obtained on 2 September 2008 as part of the Siding Spring Survey by Gordon J. Garradd.