Aiwan(Latin: Sinus Amoris) isMoonSea of TranquillityA small place in the northeastMoon SeaZone.200-300km in size, centerLunar coordinatesby18.1°N 39.1°E。Its name was first published in 1974U.S.AAppearing on the lunar map drawn by the Military Surveying and Mapping Agency for NASA, it wasInternational Astronomical UnionApproved for adoption.
Aiwan is connected to Jinghai in the southwest and to the northeastMercy Lake, Southeast andSlumberIt borders on the northJinniu Mountains。
Due to the complex terrain, and its dark surface is sometimes covered by the bright sputtering of the young impact crater, the initial boundary of Love Bay is not clear, and there isRomer CraterandCarmichael crater；To the east isHill Crater；SoutheastProclos crater。
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As of 2015Impact craterIn, the named areMarardi Crater、Carmichael crater、Gardner Crater、Frank Crater、Brewster crater、Theophrastus craterandRyushan Crater。The first of them has beenLavaThe others only appear after the lava covers.In addition, there are satellite pits and nameless pits in Yuewan, some of which have been damaged and almost completely buried by lava, especially the satellite pits with a diameter of 66km“Marard D"And several nameless craters, only a few wall towers remain in the Moon Bay.
To the south of Aiwan liesMount Isam, northwestMarardiThe volcanic dome in Yuewan is relatively dense.
Aiwan surface is located atLunar surface0.8-1.6km below the reference height, about at the same level as the surrounding area of JinghaiChenghaiIt is 1.5km higher.
basisYuewanThe southern half ofImpact craterAccording to the density assessment, the geological age of Aiwan is about 3.6 billion years, equivalent toLate Yuhai, close to the average value in the rainy sea area.
