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Posidonius (crater)

Posidonius is a lunar impact crater that is located on the north-eastern edge of Mare Serenitatis, to the south of Lacus Somniorum. It was named after ancient Greek philosopher and geographer Posidonius of Apamea.[1] The crater Chacornac is attached to the southeast rim, and to the north is Daniell.

Posidonius
Coordinates31°53′N 29°59′E / 31.88°N 29.99°E / 31.88; 29.99Coordinates: 31°53′N 29°59′E / 31.88°N 29.99°E / 31.88; 29.99
Diameter95 km
Depth2.3 km
Colongitude343° at sunrise
EponymPosidonius
Oblique view of Posidonius from Apollo 15. A tightly convoluted sinuous rille crosses the raised floor of the crater, turns back, and follows the rim to a low point in the western rim.
Part of the sinuous rille in Posidonius (LRO image).
Oblique view of Posidonius from Apollo 17. Note that the lava which flooded the crater reached its rim and is clearly above the mare plain to the west (left).
The hill Posidonius γ with the crater Posidonius Y (LRO image).

Description

The rim of Posidonius is shallow and obscured, especially on the western edge, and the interior has been overlain by a lava flow in the past. The crater ramparts can still be observed to the south and east of the crater rim, and to a lesser degree to the north.

There is a smaller, semi-circular rim of a concentric, flooded crater within the main rim, offset towards the eastern edge. There is no central peak, but the floor is hilly and laced with a rille system named the Rimae Posidonius. The floor is also slightly bulged due to the past lava uplift, which also likely produced the complex of rilles. The northeast rim is interrupted by the smaller crater Posidonius B. Within the crater rim, offset just to the west of center is another smaller crater Posidonius A.

On the Mare Serenitatis surface near Posidonius is a notable system of wrinkle ridges that parallel the nearby shore. These are designated the Dorsa Smirnov. At the peak of these ridges is a small crater, Posidonius Y, with a diameter of 2 km. This crater is surrounded by a patch of high-albedo material, its ray system. This peak was formerly designated Posidonius Gamma (γ).

Posidonius Gamma was first observed by the lunar cartographer Julius Schmidt in 1867, who noted the similarity to the bright patch surrounding the crater Linné.[2]

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 Posidonius.

Posidonius Coordinates Diameter, km
A 31°41′N 29°31′E / 31.69°N 29.52°E / 31.69; 29.52 (Posidonius A) 11.1
B 33°10′N 31°01′E / 33.16°N 31.02°E / 33.16; 31.02 (Posidonius B) 14.1
C 31°08′N 29°41′E / 31.13°N 29.69°E / 31.13; 29.69 (Posidonius C) 3.5
E 30°33′N 19°42′E / 30.55°N 19.7°E / 30.55; 19.7 (Posidonius E) 3.1
F 32°49′N 27°08′E / 32.82°N 27.13°E / 32.82; 27.13 (Posidonius F) 6.0
G 34°47′N 27°14′E / 34.79°N 27.23°E / 34.79; 27.23 (Posidonius G) 4.8
J 33°48′N 30°47′E / 33.8°N 30.79°E / 33.8; 30.79 (Posidonius J) 22.0
M 34°22′N 30°01′E / 34.36°N 30.01°E / 34.36; 30.01 (Posidonius M) 9.3
N 29°42′N 21°02′E / 29.7°N 21.04°E / 29.7; 21.04 (Posidonius N) 6.2
P 33°36′N 27°35′E / 33.6°N 27.58°E / 33.6; 27.58 (Posidonius P) 14.7
W 31°39′N 20°08′E / 31.65°N 20.13°E / 31.65; 20.13 (Posidonius W) 3.0
Y 30°02′N 24°55′E / 30.03°N 24.91°E / 30.03; 24.91 (Posidonius Y) 2.0
Z 30°45′N 22°57′E / 30.75°N 22.95°E / 30.75; 22.95 (Posidonius Z) 5.9

References

  1. ^ "Posidonius (crater)". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  2. ^ Elger T. G. (1895). The Moon. A Full Description and Map of its Principal Physical Features. London: Georg Philip & Son. p. 160. (In this book, east on the Moon is called "west" according to terminology of that time).

External links

  • Lunar Reconnaissance Orbiter pages with images:
    • Plescia J. (2013-02-05). "Meanders in Posidonius". NASA/GSFC/LROC, School of Earth and Space Exploration, Arizona State University. from the original on 2018-01-30. - especially on the rille Rimae Posidonius
    • Braden S. (2011-10-25). "Posidonius Y". NASA/GSFC/LROC, School of Earth and Space Exploration, Arizona State University. from the original on 2017-10-05.
    • Ostrach L. (2010-12-01). "Rimae Posidonius". NASA/GSFC/LROC, School of Earth and Space Exploration, Arizona State University. from the original on 2018-05-31.

posidonius, crater, posidonius, lunar, impact, crater, that, located, north, eastern, edge, mare, serenitatis, south, lacus, somniorum, named, after, ancient, greek, philosopher, geographer, posidonius, apamea, crater, chacornac, attached, southeast, north, da. Posidonius is a lunar impact crater that is located on the north eastern edge of Mare Serenitatis to the south of Lacus Somniorum It was named after ancient Greek philosopher and geographer Posidonius of Apamea 1 The crater Chacornac is attached to the southeast rim and to the north is Daniell PosidoniusMosaic of Lunar Reconnaissance Orbiter imagesCoordinates31 53 N 29 59 E 31 88 N 29 99 E 31 88 29 99 Coordinates 31 53 N 29 59 E 31 88 N 29 99 E 31 88 29 99Diameter95 kmDepth2 3 kmColongitude343 at sunriseEponymPosidoniusOblique view of Posidonius from Apollo 15 A tightly convoluted sinuous rille crosses the raised floor of the crater turns back and follows the rim to a low point in the western rim Part of the sinuous rille in Posidonius LRO image Oblique view of Posidonius from Apollo 17 Note that the lava which flooded the crater reached its rim and is clearly above the mare plain to the west left The hill Posidonius g with the crater Posidonius Y LRO image Contents 1 Description 2 Satellite craters 3 References 4 External linksDescription EditThe rim of Posidonius is shallow and obscured especially on the western edge and the interior has been overlain by a lava flow in the past The crater ramparts can still be observed to the south and east of the crater rim and to a lesser degree to the north There is a smaller semi circular rim of a concentric flooded crater within the main rim offset towards the eastern edge There is no central peak but the floor is hilly and laced with a rille system named the Rimae Posidonius The floor is also slightly bulged due to the past lava uplift which also likely produced the complex of rilles The northeast rim is interrupted by the smaller crater Posidonius B Within the crater rim offset just to the west of center is another smaller crater Posidonius A On the Mare Serenitatis surface near Posidonius is a notable system of wrinkle ridges that parallel the nearby shore These are designated the Dorsa Smirnov At the peak of these ridges is a small crater Posidonius Y with a diameter of 2 km This crater is surrounded by a patch of high albedo material its ray system This peak was formerly designated Posidonius Gamma g Posidonius Gamma was first observed by the lunar cartographer Julius Schmidt in 1867 who noted the similarity to the bright patch surrounding the crater Linne 2 Satellite craters EditBy convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Posidonius Posidonius Coordinates Diameter kmA 31 41 N 29 31 E 31 69 N 29 52 E 31 69 29 52 Posidonius A 11 1B 33 10 N 31 01 E 33 16 N 31 02 E 33 16 31 02 Posidonius B 14 1C 31 08 N 29 41 E 31 13 N 29 69 E 31 13 29 69 Posidonius C 3 5E 30 33 N 19 42 E 30 55 N 19 7 E 30 55 19 7 Posidonius E 3 1F 32 49 N 27 08 E 32 82 N 27 13 E 32 82 27 13 Posidonius F 6 0G 34 47 N 27 14 E 34 79 N 27 23 E 34 79 27 23 Posidonius G 4 8J 33 48 N 30 47 E 33 8 N 30 79 E 33 8 30 79 Posidonius J 22 0M 34 22 N 30 01 E 34 36 N 30 01 E 34 36 30 01 Posidonius M 9 3N 29 42 N 21 02 E 29 7 N 21 04 E 29 7 21 04 Posidonius N 6 2P 33 36 N 27 35 E 33 6 N 27 58 E 33 6 27 58 Posidonius P 14 7W 31 39 N 20 08 E 31 65 N 20 13 E 31 65 20 13 Posidonius W 3 0Y 30 02 N 24 55 E 30 03 N 24 91 E 30 03 24 91 Posidonius Y 2 0Z 30 45 N 22 57 E 30 75 N 22 95 E 30 75 22 95 Posidonius Z 5 9References Edit Posidonius crater Gazetteer of Planetary Nomenclature USGS Astrogeology Research Program Elger T G 1895 The Moon A Full Description and Map of its Principal Physical Features London Georg Philip amp Son p 160 In this book east on the Moon is called west according to terminology of that time Andersson L E Whitaker E A 1982 NASA Catalogue of Lunar Nomenclature NASA RP 1097 Bussey B Spudis P 2004 The Clementine Atlas of the Moon New York Cambridge University Press ISBN 978 0 521 81528 4 Cocks Elijah E Cocks Josiah C 1995 Who s Who on the Moon A Biographical Dictionary of Lunar Nomenclature Tudor Publishers ISBN 978 0 936389 27 1 McDowell Jonathan July 15 2007 Lunar Nomenclature Jonathan s Space Report Retrieved 2007 10 24 Menzel D H Minnaert M Levin B Dollfus A Bell B 1971 Report on Lunar Nomenclature by the Working Group of Commission 17 of the IAU Space Science Reviews 12 2 136 186 Bibcode 1971SSRv 12 136M doi 10 1007 BF00171763 S2CID 122125855 Moore Patrick 2001 On the Moon Sterling Publishing Co ISBN 978 0 304 35469 6 Price Fred W 1988 The Moon Observer s Handbook Cambridge University Press ISBN 978 0 521 33500 3 Rukl Antonin 1990 Atlas of the Moon Kalmbach Books ISBN 978 0 913135 17 4 Webb Rev T W 1962 Celestial Objects for Common Telescopes 6th revised ed Dover ISBN 978 0 486 20917 3 Whitaker Ewen A 1999 Mapping and Naming the Moon Cambridge University Press ISBN 978 0 521 62248 6 Wlasuk Peter T 2000 Observing the Moon Springer ISBN 978 1 85233 193 1 External links Edit Wikimedia Commons has media related to Posidonius crater Lunar Reconnaissance Orbiter pages with images Plescia J 2013 02 05 Meanders in Posidonius NASA GSFC LROC School of Earth and Space Exploration Arizona State University Archived from the original on 2018 01 30 especially on the rille Rimae Posidonius Braden S 2011 10 25 Posidonius Y NASA GSFC LROC School of Earth and Space Exploration Arizona State University Archived from the original on 2017 10 05 Ostrach L 2010 12 01 Rimae Posidonius NASA GSFC LROC School of Earth and Space Exploration Arizona State University Archived from the original on 2018 05 31 Retrieved from https en wikipedia org w index php title Posidonius crater amp oldid 1110375898, wikipedia, wiki, book, books, library,

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