V339 Delphini

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V339 Delphini
Nova Delphini 2013 in night sky- It is marked in the image 2013-08-18 14-49.jpg
Nova Delphini 2013 (marked)
Observation data
Epoch J2000      Equinox J2000
Constellation Delphinus
Right ascension 20h 23m 30.68s [1]
Declination +20° 46′ 03.8″ [1]
Apparent magnitude (V) 16.86
Other designations
V339 Delphini, V339 Del,[1] Nova Delphini 2013, Nova Del 2013,[1] PNV J20233073+2046041,[1] PNV J2023+2046
Database references

V339 Delphini or Nova Delphini 2013 (PNV J20233073+2046041) is a bright nova star in the constellation Delphinus. It was discovered on 14 August 2013 by amateur astronomer Koichi Itagaki in Japan and confirmed by the Liverpool Telescope on La Palma. The nova appeared with a magnitude 6.8 when it was discovered and peaked at magnitude 4.3 on 16 August 2013.[2][3][4] A nova is produced by the fusion of accumulated material on the white dwarf nova progenitor acquired from its companion star. The nova system is thus a binary star, and a classical nova.[5]

V339 Del is the first nova that has been observed to synthesize the element lithium. Production of lithium-7 from the decay of beryllium-7, which was observed in the wind blown out of the nova. This is the first direct evidence of the supply of lithium to the interstellar medium by an astronomical object. Lithium-7 is fragile in the environment at the center of a nova, so being blown out of the environment at the center is necessary for the observation of lithium. The beryllium was produced by the fusion of helium-3 with helium-4. Nucleosynthesis of lithium is important in the study of chemical abundances in the universe.[5]

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Coordinates: Sky map 20h 23m 30.68s, +20° 46′ 3.7″