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Coordinates | 32°54′S31°48′W / 32.9°S 31.8°W |
---|---|
Diameter | 25 km |
Depth | 2.0 km |
Colongitude | 31° at sunrise |
Eponym | Jesse Ramsden |
Ramsden is a lunar impact crater located on the western stretch of the Palus Epidemiarum. It was named after British instrument maker Jesse Ramsden. [1] To the east-southeast is the crater Capuanus, and to the north lies Dunthorne.
The floor of the crater has been flooded with lava, and contains several small impact craters. The rim is somewhat oval and irregular in outline, with depressions at the north and south walls. It has a slight rampart, but lacks terraces, a central peak, or a ray system.
The crater lies directly across a rille system named the Rimae Ramsden. These span an area 130 kilometers across, sprawling over the western Palus Epidemiarum. A branch reaches northwest to the Mare Nubium, passing between the craters Campanus and Mercator.
By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Ramsden.
Ramsden | Latitude | Longitude | Diameter |
---|---|---|---|
A | 33.4° S | 31.3° W | 5 km |
G | 35.3° S | 31.6° W | 11 km |
H | 35.7° S | 32.4° W | 11 km |
Hesiodus is a lunar impact crater located on the southern fringes of Mare Nubium, to the northwest of the crater Pitatus. It was named after the ancient Greek poet Hesiod. Starting near the northwest rim of Hesiodus is the wide cleft named Rima Hesiodus. This rille runs 300 km east-southeastward to the Palus Epidemiarum
Marth is a small lunar impact crater located in the northwest part of the Palus Epidemiarum. It was named after German astronomer Albert Marth. To the northwest is the crater Dunthorne, and to the southwest lies Ramsden. This feature lies in a system of rilles named the Rimae Ramsden, and an interrupted branch passes only a few kilometers to the south of the rim.
Crile is a tiny lunar impact crater. It is roughly circular and cup-shaped, with interior walls that slope down to the midpoint. The crater lies in the Palus Somni, between the Mare Crisium to the east and Mare Tranquillitatis to the west.
Mercator is a lunar impact crater that is located on the southwestern edge of Mare Nubium, in the southwest part of the Moon. It was named after 16th-century Southern Dutch cartographer Gerardus Mercator. It is located to the southeast of the crater Campanus, and the two are separated by a narrow, winding valley.
Avicenna is a lunar impact crater that lies on the far side of the Moon, just beyond the western limb on the northern rim of the Lorentz basin. It is named after the Persian polymath Avicenna. It lies to the north-northwest of the larger crater Nernst, and to the southeast of Bragg.
Ctesibius is a small lunar impact crater that is located near the equator, on the far side of the Moon. It is named after the ancient Greek-Egyptian inventor Ctesibius. It lies between the larger crater Abul Wáfa to the west and the slightly smaller Heron to the east.
Bohr is a lunar impact crater that is located near the western lunar limb, in the area that is affected by librations. It is attached to the southwestern rim of the larger, eroded Vasco da Gama formation, and to the southeast of the crater Einstein. The crater was observed for the first time in 1963, by Arthus and Ewen Whitaker in the book Rectified Lunar Atlas.
Bell is a lunar impact crater that is located on the far side of the Moon, just past the western limb. It lies in an area of terrain that is marked by many small craters, a number of which are satellite craters of Bell listed in the table below. Bell lies within two crater diameters of Laue to the north, and to the west of the smaller Helberg.
Campanus is a lunar impact crater that is located on the southwestern edge of Mare Nubium. It was named after Italian astronomer Campanus of Novara. It forms a crater pair with Mercator just to the southeast. Along the southern rampart of Campanus is the small lunar mare named Palus Epidemiarum. To the southwest is the small crater Dunthorne.
Capuanus is a lunar impact crater that lies along the southern edge of the Palus Epidemiarum. It was named after Italian astronomer F. Capuano di Manfredonia. The outer rim is eroded and indented by lesser crater impacts, with notches in the north, west, and southern parts of the rim. The interior floor has been resurfaced by basaltic lava, which is connected to the surrounding lunar mare by a narrow, crater-formed gap in the northern rim. Dotting the floor of the crater are a number of domes, which are believed to have formed through volcanic activity.
Elger is a lunar impact crater that lies along the southern edge of Palus Epidemiarum, the Marsh of Epidemics, in the southwest part of the Moon's near side. To the northeast is the flooded crater Capuanus, and farther to the northwest is Ramsden.
Dunthorne is a small lunar impact crater that is located to the northwest of the small lunar mare called Palus Epidemiarum, in the southwest part of the Moon's near side. It was named after British astronomer Richard Dunthorne. It lies to the southwest of the crater Campanus, east of Vitello. Due south is Ramsden.
Cichus is a lunar impact crater that lies in the southwestern part of the Moon, at the eastern edge of Palus Epidemiarum. Just to the northeast and nearly contacting the rim is the lava-flooded crater remnant Weiss. The crater is named after Italian astronomer Cecco d'Ascoli.
Charlier is a lunar impact crater that is located on the far side of the Moon. To the south-southeast is the larger crater Kovalevskaya, and northeast of Charlier is Perrine.
Chandler is a lunar impact crater in the northern hemisphere, on the Moon's far side. It lies to the southeast of the large walled plain D'Alembert, and southeast of the slightly smaller Chernyshev crater.
File: Franz is a small lunar impact crater identified during the Apollo mission in August 1971 and located along the eastern edge of the Sinus Amoris, a bay that forms a northern extension to the Mare Tranquillitatis. Its diameter is 25 km. It was named after German astronomer Julius Heinrich Franz. It lies to the southwest of the prominent crater Macrobius. To the north is the smaller Carmichael, and to the northwest is the diminutive Theophrastus.
Lepaute is a small lunar impact crater that is located along the western edge of the Palus Epidemiarum, a minor lunar mare in the southwestern part of the Moon's near side. It was named after French astronomer Nicole-Reine Lepaute. To the east is the larger crater Ramsden, within a system of rilles named the Rimae Ramsden. This is an elongated crater feature that is longer in the north–south direction. The outer rim is only slightly worn, and the inner walls are simple slopes that run down to the level, featureless interior floor.
Douglass is a lunar impact crater on the far side of the Moon. It lies to the southwest of the crater Frost and south-southwest of the large walled plain Landau.
Fersman is a large lunar impact crater on the Moon's far side. It lies to the east of the crater Poynting, and west-northwest of Weyl. To the south is the huge walled plain Hertzsprung.
FitzGerald is a large lunar impact crater on the far side of the Moon. It lies to the west-southwest of the crater Cockcroft, and about two crater diameters to the northeast of Morse.