100P/Hartley
< 100P
| Discovery | |
|---|---|
| Discovered by | Malcolm Hartley |
| Discovery site | UK Schmidt Telescope |
| Discovery date | 13 June 1985 |
| Designations | |
| P/1985 L1 P/1991 E1 | |
| |
| Orbital characteristics | |
| Epoch | 13 September 2023 (JD 2460200.5) |
| Observation arc | 37.17 years |
| Number of observations | 658 |
| Aphelion | 4.844 AU |
| Perihelion | 2.018 AU |
| Semi-major axis | 3.416 AU |
| Eccentricity | 0.41183 |
| Orbital period | 6.354 years |
| Inclination | 25.567° |
| 37.687° | |
| Argument of periapsis | 181.96° |
| Mean anomaly | 67.750° |
| Last perihelion | 10 August 2022 |
| Next perihelion | 15 December 2028 |
| TJupiter | 2.851 |
| Earth MOID | 1.003 AU |
| Jupiter MOID | 0.133 AU |
| Physical characteristics | |
Mean radius | < 1.2 km (0.75 mi) |
| Comet total magnitude (M1) | 10.0 |
| Comet nuclear magnitude (M2) | 16.2 |
100P/Hartley, also known as Hartley 1, is a periodic, Jupiter family comet in the Solar System.
On 29 April 2164, the comet will pass 0.487 AU (72.9 million km; 45.3 million mi) from Earth.