Abetti is a lunar crater

Impact crater

In the broadest sense, the term impact crater can be applied to any depression, natural or manmade, resulting from the high velocity impact of a projectile with a larger body...

 that has been completely submerged by mare

Lunar mare

The lunar maria are large, dark, basaltic plains on Earth's Moon, formed by ancient volcanic eruptions. They were dubbed maria, Latin for "seas", by early astronomers who mistook them for actual seas. They are less reflective than the "highlands" as a result of their iron-rich compositions, and...

 lavas. It forms a 'ghost crater

Palimpsest

A palimpsest is a manuscript page from a scroll or book from which the text has been scraped off and which can be used again. The word "palimpsest" comes through Latin palimpsēstus from Ancient Greek παλίμψηστος originally compounded from πάλιν and ψάω literally meaning “scraped...

' in the surface, showing only a curved rise where the rim is located. Abetti is located near the southeast edge of Mare Serenitatis

Mare Serenitatis

Mare Serenitatis is a lunar mare that sits just to the east of Mare Imbrium on the Moon.It is located within the Serenitatis basin, which is of the Nectarian epoch. The material surrounding the mare is of the Lower Imbrian epoch, while the mare material is of the Upper Imbrian epoch...

, to the west of the Mons Argaeus

Mons Argaeus

Mons Argaeus is a mountainous massif on the Moon that extends for a length of 50 km towards the southeast. It is located at selenographic coordinates 19.0°N, 29.0°E, in the mountainous southeastern border of the Mare Serenitatis...

. This crater is generally visible only at low angles of illumination. It is named after two Italian astronomers, Antonio Abetti

Antonio Abetti

Antonio Abetti was an Italian astronomer.Born in San Pietro di Gorizia , he earned a degree in mathematics and engineering at the University of Padua. Later he became director of the Osservatorio Astrofisico di Arcetri and a professor at the University of Florence...

 and his son Giorgio

Giorgio Abetti

Giorgio Abetti was an Italian solar astronomer.He was born in Padua, the son of noted astronomer Antonio Abetti. He was educated at the Universities of Padua and of Rome....

.