C/2008 Q3 (Garradd)
| Discovery | |
|---|---|
| Discovered by | Gordon J. Garradd |
| Discovery site | Siding Spring Observatory |
| Discovery date | 27 August 2008 |
| Orbital characteristics | |
| Epoch | 27 August 2009 (JD 2455070.5) |
| Observation arc | 431 days (1.18 years) |
| Number of observations | 701 |
| Aphelion | ~17,780 AU |
| Perihelion | 1.798 AU |
| Semi-major axis | ~8,900 AU |
| Eccentricity | 0.99979 |
| Orbital period | ~840,000 years |
| Inclination | 140.71° |
| 219.73° | |
| Argument of periapsis | 340.86° |
| Mean anomaly | 0.0001° |
| Last perihelion | 23 June 2009 |
| TJupiter | –1.286 |
| Earth MOID | 0.814 AU |
| Jupiter MOID | 2.561 AU |
| Physical characteristics | |
Mean diameter | 6.7 km (4.2 mi) |
| Comet total magnitude (M1) | 6.3 |
| Comet nuclear magnitude (M2) | 12.8 |
Comet Garradd, formally designated as C/2008 Q3, is a non-periodic comet that was observed from August 2008 to June 2010. It is the 11th out of 17 comets discovered by Australian astronomer, Gordon J. Garradd.