Hornsby is a tiny lunar

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 crater ...

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 epo ...

, a

lunar mare The lunar maria (; singular: mare ) are large, dark, basaltic plains on Earth's Moon, formed by ancient asteroid impacts on the far side on the Moon that triggered volcanic activity on the opposite (near) side. They were dubbed , Latin for 'seas' ...

in the northeast quadrant of the

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 ...

'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 measure of the diffuse reflection of solar radiation out of the total solar radiation and measured on a scale from 0, corresponding to a black body that absorbs all incident radiation, to 1, corresponding to a body that refl ...

material. To the west of Hornsby is the wrinkle ridge

Dorsum Von Cotta Dorsum Von Cotta is a wrinkle ridge at in Mare Serenitatis on the Moon. It is 183 km long and trends south to north at approximately the lunar 12th parallel. It was named after German geologist Bernhard von Cotta Carl Bernhard von Cotta, known ...

References

* * * * * * * * * * *

External links

LTO-42D1 Hornsby
{Dead link, date=January 2020 , bot=InternetArchiveBot , fix-attempted=yes — 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