273P/Pons–Gambart, also called Comet Pons-Gambart, is a periodic comet in a retrograde orbit first discovered on 21 June 1827 by Jean-Louis Pons and Jean-Félix Adolphe Gambart. It has a 186-year orbit and it fits the classical definition of a Halley-type comet (20 years < period < 200 years). Its last perihelion was in December 2012 and will next come to perihelion around August 2191.
273P/Pons–Gambart, also called Comet Pons-Gambart, is a periodic comet in a retrograde orbit first discovered on 21 June 1827 by Jean-Louis Pons and Jean-Félix Adolphe Gambart. It has a 186-year orbit and it fits the classical definition of a Halley-type comet (20 years < period < 200 years). Its last perihelion was in December 2012 and will next come to perihelion around August 2191.
== Orbit == The orbit was initially considered to be parabolic, but its orbit was recalculated in 1917 and it was found to be elliptical with an orbital period determined to be 64 years with 10 years uncertainly. The comet was considered lost until 7 November 2012, when amateur astronomer Rob Matson discovered a comet in images taken by SWAN instrument on board SOHO, and it was identified that the pre-recovery short-arc orbital calculations for Pons-Gambart were completely wrong because the comet only had a 1-month observation arc with poor data and that was the first perihelion after the 1827 apparition. It was last observed in April 2014 when it was from the Sun.
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).