| 100P/Hartley | |
| Discoverer: | Malcolm Hartley |
| Discovery Date: | June 13, 1985 |
| Designations: | 1991 VII; 1985 VII |
| Epoch: | 2011-Dec-05 2455900.5 |
| Earth Moid: | 1AU |
| Semimajor: | 3.416 AU |
| Perihelion: | 1.990 AU |
| Aphelion: | 4.841 AU |
| Eccentricity: | 0.4172 |
| Period: | 6.31 a |
| Inclination: | 25.661° |
| Last P: | 2022-Aug-10 2016 Apr. 2 2009 Dec. 6 |
| Next P: | 2028-Dec-15[1] |
100P/Hartley, also known as Hartley 1, is a periodic, Jupiter family comet in the Solar System.[2]
On 29 April 2164 the comet will pass 0.487abbr=onNaNabbr=on from Earth.[3]