Tirawa basin is a large

impact crater An impact crater is a circular depression in the surface of a solid astronomical object formed by the hypervelocity impact of a smaller object. In contrast to volcanic craters, which result from explosion or internal collapse, impact craters ...

Saturn Saturn is the sixth planet from the Sun and the second-largest in the Solar System, after Jupiter. It is a gas giant with an average radius of about nine and a half times that of Earth. It has only one-eighth the average density of Earth; h ...

moon The Moon is Earth's only natural satellite. It is the fifth largest satellite in the Solar System and the largest and most massive relative to its parent planet, with a diameter about one-quarter that of Earth (comparable to the width of ...

Rhea, at . It was glimpsed by ''

Voyager 1 ''Voyager 1'' is a space probe launched by NASA on September 5, 1977, as part of the Voyager program to study the outer Solar System and interstellar space beyond the Sun's heliosphere. Launched 16 days after its twin ''Voyager 2'', ''Voya ...

'' during its flyby of the moon and later photographed in greater detail by the ''Cassini'' orbiter. Tirawa is deep in places, as measured in NASA Voyager images, and is across. The crater has a slightly elliptic outline and an elongated central peak complex suggesting it was caused by an oblique impact. Tirawa overlaps Mamaldi, a larger and more degraded basin to its southwest.http://www.lpi.usra.edu/meetings/lpsc2007/pdf/1958.pdf

References

Impact craters on Saturn's moons Rhea (moon) {{crater-stub