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