| Discovery | |
|---|---|
| Discovered by | Christian Heinrich Friedrich Peters ofCapodimonte Observatory, Naples, Italy |
| Discovery date | 26 June 1846 |
| Designations | |
| 1990 IX, 1990d, 80P/1982 N1, 1982 III, 1982h, 80P/1846 M1, 1846 VI | |
| Orbital characteristics | |
| Epoch | 9 December 2014 |
| Aphelion | 6.46 AU |
| Perihelion | 1.6127 AU |
| Semi-major axis | 4.022AU |
| Eccentricity | 0.599 |
| Orbital period | 8.12a |
| Inclination | 29.922° |
| Last perihelion | 2022-Dec-08[1] 2014-Nov-10 |
| Next perihelion | 2030-Dec-28[2] |
80P/Peters–Hartley is aperiodiccomet in theSolar System with an orbital period of 8.12 years.
It was originally discovered byChristian Heinrich Friedrich Peters ofCapodimonte Observatory, Naples, Italy. There was insufficient data to accurately compute the orbit, and the comet was lost for well over a hundred years.
It was accidentally rediscovered byMalcolm Hartley at theUK Schmidt Telescope Unit, Siding Spring, Australia on a photographic plate exposed on 11 July 1982. He estimated its brightness at amagnitude of 15. The sighting was confirmed by thePerth Observatory, where M. C. Candy calculated the orbit and concluded that Hartley had indeed relocated the lost Peter's comet. I. Hasegawa andSyuichi Nakano had simultaneously reached the same conclusion.
It was observed at its next apparition in 1990 by R. H. McNaught of the Siding Spring observatory, who described as diffuse with a brightness of magnitude 14. It was subsequently observed in 1998, 2006 and 2014.
| Numbered comets | ||
|---|---|---|
| Previous 79P/du Toit–Hartley | 80P/Peters–Hartley | Next 81P/Wild |
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