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Halley's Comet is the only known short-period comet that is consistently visible to the naked eye from Earth, [16] appearing every 72–80 years, [17] though with the majority of recorded apparations (25 of 30) occurring after 75–77 years.
13P/Olbers is a periodic comet with an orbital period of 69 years. It fits the classical definition of a Halley-type comet with a period between 20 and 200 years. [5] The comet last passed perihelion 30 June 2024 and it was previously seen in 1956.
The appearance of the Daylight Comet several months earlier therefore came as something of a surprise, and made an extremely strong impression on an expectant public; when Halley's Comet returned again in 1986, many older people's accounts of having seen it in 1910 clearly referred to the Daylight Comet instead. [5]
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A comet last visible during the Stone Age has appeared for the first time over Stonehenge. ... The famous Halley’s comet had a magnitude of about +2 during its 1986 passby, and the comet Bennett ...
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The comet’s next appearance may be in 80,000 years. ... Sky-gazers won’t want to miss the event since it may be the last time the comet will be seen in the night sky for another 80,000 years ...