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| density = ~1.2 g/cm³ (estimate)〔 | surface_grav = ~ m/s2〔 | escape_velocity = ~ km/s〔 | rotation = synchronous | axial_tilt = zero | albedo = 0.09〔〔 | magnitude = 21.5〔 | single_temperature = ~51 K mean (estimate) | note=no }} Larissa ( ; Greek: ''Λάρισσα''), also known as Neptune VII, is the fifth-closest inner satellite of Neptune. It is named after Larissa, a lover of Poseidon (Neptune) in Greek mythology and eponymous nymph of the city in Thessaly, Greece. == Discovery == It was first discovered by Harold J. Reitsema, William B. Hubbard, Larry A. Lebofsky and David J. Tholen, based on fortuitous ground-based stellar occultation observations〔 on May 24, 1981, given the temporary designation S/1981 N 1 and announced on May 29, 1981.〔 The moon was recovered and confirmed to be the only object in its orbit during the ''Voyager 2'' flyby in 1989〔 after which it received the additional designation S/1989 N 2 on August 2, 1989.〔 The announcement by Stephen P. Synnott spoke of “10 frames taken over 5 days”, which gives a recovery date sometime before July 28. The name was given on September 16, 1991.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Larissa (moon)」の詳細全文を読む スポンサード リンク
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