English: Intrusive dome on the Moon, in Mare Frigoris (very low wide elevation with irregular roundish boundaries, which is seen only due to low Sun). Its width is 30-40 km and heigth is about 200 m (according to altimetric data by LRO spacecraft, obtained via JMARS software). It is known as Ar1 (see Wöhler & Lena, 2009). Shore of Mare Frigoris is seen in lower left. Two craters in the center are concentric craters; bigger one is Archytas G, and smaller one is unnamed. A chain of secondary craters with characteristic herringbone pattern of ejecta is seen to upper left. Image by Lunar Reconnaissance Orbiter, made with Wide Angle Camera on 20 June 2010 from altitude 41 km. Sun elevation is 5.6°. Width of the photo is 45 km, north is approximately up.