Triesnecker is a prominent

lunar Lunar most commonly means "of or relating to the Moon". Lunar may also refer to: Arts and entertainment * ''Lunar'' (series), a series of video games * "Lunar" (song), by David Guetta * "Lunar", a song by Priestess from the 2009 album ''Prior t ...

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 ...

that is located in the

Sinus Medii Sinus Medii (Latin ''sinus mediī'' "Middle Bay") is a small lunar mare. It takes its name from its location at the intersection of the Moon's equator and prime meridian; as seen from the Earth, this feature is located in the central part of the ...

, near the central part 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. Its diameter is 25 km. It was named after Austrian astronomer

Franz de Paula Triesnecker Franz de Paula Triesnecker (2 April 1745 – 29 January 1817) was an Austrian Jesuit astronomer. Biography Triesnecker was born in Mallon, Kirchberg am Wagram, Austria. When he was 16 he joined the Society of Jesus. He studied philosophy in Vien ...

. It is located to the north-northwest of the crater Rhaeticus, and to the east-southeast of the flooded Murchison. The crater rim of Triesnecker is somewhat distorted from a circular shape, having a notable bulge in the western wall, and lesser rises in the southeastern and northeastern rims. The inner walls are terraced and the interior is somewhat rough, with a central peak at the midpoint. Triesnecker has a

ray system A ray system comprises radial streaks of fine '' ejecta'' thrown out during the formation of an impact crater, looking somewhat like many thin spokes coming from the hub of a wheel. The rays may extend for lengths up to several times the diameter ...

that is most prominent when the sun is at a high angle. The rays extend over 300 kilometers. To the east of this crater is an extensive system of

rille Rille (German for 'groove') is typically used to describe any of the long, narrow depressions in the surface of the Moon that resemble channels. The Latin term is ''rima'', plural ''rimae''. Typically, a rille can be several kilometers wid ...

s extending over an area 200 kilometers across, running generally north–south. These were likely created by

tectonic Tectonics (; ) are the processes that control the structure and properties of the Earth's crust and its evolution through time. These include the processes of mountain building, the growth and behavior of the strong, old cores of continents k ...

forces beneath the surface. Beyond, to the northeast, is the Rima Hyginus valley, with the crater

Hyginus Gaius Julius Hyginus (; 64 BC – AD 17) was a Latin author, a pupil of the scholar Alexander Polyhistor, and a freedman of Caesar Augustus. He was elected superintendent of the Palatine library by Augustus according to Suetonius' ''De Grammatic ...

at the midpoint.

Satellite craters

By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Triesnecker. AS10-32-4819 Triesnecker crater

References

* * * * * * * * * * *

External links

Triesnecker
at the Moon Wiki
Rimae Triesnecker
at the Moon Wiki *

Lunar Orbiter 2 The 1966 Lunar Orbiter 2 robotic spacecraft mission, part of the Lunar Orbiter Program, was designed primarily to photograph smooth areas of the lunar surface for selection and verification of safe landing sites for the Surveyor and Apollo mi ...

br>Closeup of Rimae Triesnecker
(Lunar and Planetary Institute)

* - only the rille * * - one of the craters depicts Triesnecker * - only the rille * - both the crater and the rille * * - both the crater and the rille * {{cite web, last = Wood , first =Chuck , date = May 5, 2009 , url = http://lpod.wikispaces.com/May+5%2C+2009, title = Two Views , publisher = Lunar Photo of the Day, access-date=August 7, 2017 Impact craters on the Moon

Satellite craters

References

External links

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