| Discovery | |
|---|---|
| Discovered by | Malcolm Hartley IRAS |
| Discovery date | November 4, 1983 |
| Designations | |
| 1983v, 1984 III; 2004 V2 | |
| Orbital characteristics | |
| Epoch | March 6, 2006 |
| Aphelion | 14.19 AU |
| Perihelion | 1.275 AU |
| Semi-major axis | 7.734AU |
| Eccentricity | 0.8351 |
| Orbital period | 21.51yr |
| Inclination | 95.6899° |
| Last perihelion | June 20, 2005 |
| Next perihelion | 2026 Oct. 29[1] 2026 Nov. 27[2][3][4] 2026 December 18[5] |
161P/Hartley–IRAS is aperiodiccomet with anorbital period of 21 years. It fits the classical definition of a Halley-type comet with (20 years <period < 200 years).[6]
This was one of six comets discovered by the infrared space telescopeIRAS, in 1983.[7][8]
| Numbered comets | ||
|---|---|---|
| Previous 160P/LINEAR | 161P/Hartley–IRAS | Next 162P/Siding Spring |
 | This comet-related article is astub. You can help Wikipedia byexpanding it. |
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