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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.
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 following list is of comets with very long orbital periods, defined as between 200 and 1000 years.These comets come from the Kuiper belt and scattered disk, beyond the orbit of Pluto, with possible origins in the Oort cloud for many.
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.
The official names of non-periodic comets begin with a "C"; the names of periodic comets begin with "P" or a number followed by "P". Comets that have been lost or disappeared have names with a "D". Comets whose orbit has not been determined are designated with a "X" prefix.
The comet approached Earth at a distance of 0.096 astronomical units (14,400,000 km; 8,900,000 mi) on 8 August 1864 and was at a solar elongation of 12°. [2] After the closest approach the comet appeared in the evening sky. The comet was recovered by Schmidt on 9 August and the next day he estimated its magnitude to be 2–3.
1 non-periodic comet. 2 comments. Toggle the table of contents. Talk: C/1861 G1 (Thatcher) Add languages. Page contents not supported in other languages. Article; Talk;
Comet Donati–Toussaint, formally designated as C/1864 O1, is a non-periodic comet co-discovered by Italian astronomers, Giovanni Battista Donati and Carlo Toussaint in July 1864. Discovery and observations