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The comet passed about 0.335 AU (50.1 million km; 31.1 million mi) from the Earth on 5 May 1861 and last came to perihelion (closest approach to the Sun) on 3 June 1861. [ 3 ] C/1861 G1 is listed as a long-period "non-periodic comet" because it has not yet been observed at two perihelion passages.
The source of the meteor shower are particles of dust shed by the long-period Comet C/1861 G1 Thatcher. [1] The April Lyrids are the strongest annual shower of meteors from debris of a long-period comet, mainly because as far as other intermediate long-period comets go (200–10,000 years), this one has a relatively short orbital period of ...
In general, lower denomination errors are less expensive than higher denomination errors simply because more such coins are minted resulting in available errors. Due to improvements in production and inspection, modern errors are more rare and this impacts value. [ 3 ]
The over mint mark is created when a one date and mint mark is punched over another date, part of a date, or mint mark. These coins are generally restricted to the early minting process of coins dating before the turn of the century. The DDO and DDR errors are related to any part of the coin that shows a distinct doubling.
In comet nomenclature, the letter before the "/" is either "C" (a non-periodic comet), "P" (a periodic comet), "D" (a comet that has been lost or has disintegrated), "X" (a comet for which no reliable orbit could be calculated —usually historical comets), "I" for an interstellar object, or "A" for an object that was either mistakenly ...
The Great Comet of 1861, formally designated C/1861 J1 and 1861 II, is a long-period comet that was visible to the naked eye for approximately 3 months. [6] It was categorized as a great comet —one of the eight greatest comets of the 19th century.