Hornsby is a tiny lunar

impact crater An impact crater is a depression (geology), depression in the surface of a solid astronomical body formed by the hypervelocity impact event, impact of a smaller object. In contrast to volcanic craters, which result from explosion or internal c ...

in the western part of the

Mare Serenitatis Mare Serenitatis (Latin ''serēnitātis'', the "Sea of Serenity") is a lunar mare located to the east of Mare Imbrium on the Moon. Its diameter is . Geology Mare Serenitatis is located within the Serenitatis basin, which is of the Nectarian ...

, a

lunar mare The lunar maria ( ; mare ) are large, dark, basaltic plains on Earth's Moon, formed by lava flowing into ancient impact basins. They are less reflective than the "highlands" as a result of their iron-rich composition, and hence appear dark to ...

in the northeast quadrant of the

Moon The Moon is Earth's only natural satellite. It Orbit of the Moon, orbits around Earth at Lunar distance, an average distance of (; about 30 times Earth diameter, Earth's diameter). The Moon rotation, rotates, with a rotation period (lunar ...

's near side. It was named after British astronomer

Thomas Hornsby Thomas Hornsby (1733 in Durham – 11 April 1810 in Oxford) was a British astronomer and mathematician. Life Hornsby became a Fellow of Corpus Christi College, Oxford in 1760. He occupied the Savilian Chair of Astronomy at Oxford University fr ...

. It is a solitary formation that is located at least 100 kilometers from any significant craters, although the curiously shaped depression Aratus CA lies about 50 km to the west-northwest. To the north-northwest is Linné, a feature notable for its skirt of high-

albedo Albedo ( ; ) is the fraction of sunlight that is Diffuse reflection, diffusely reflected by a body. It is measured on a scale from 0 (corresponding to a black body that absorbs all incident radiation) to 1 (corresponding to a body that reflects ...

material. To the west of Hornsby is the

wrinkle ridge A wrinkle ridge is a type of feature commonly found on lunar maria, or basalt plains. These features are low, sinuous ridges formed on the mare surface that can extend for up to several hundred kilometers. Wrinkle ridges are tectonic features ...

Dorsum Von Cotta.

References

* * * * * * * * * * *

External links

{{Commons category
LTO-42D1 Hornsby
— L&PI

topographic map In modern mapping, a topographic map or topographic sheet is a type of map characterized by large- scale detail and quantitative representation of relief features, usually using contour lines (connecting points of equal elevation), but histori ...

Impact craters on the Moon