Coordinates | 5°00′N23°12′E / 5.0°N 23.2°E Coordinates: 5°00′N23°12′E / 5.0°N 23.2°E |
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Diameter | 75 km |
Depth | Unknown |
Colongitude | 337° at sunrise |
Eponym | Johann von Lamont |
Lamont is a system of low ridges in the surface of Mare Tranquillitatis that is most likely a submerged impact crater. It was named after Scottish-born German astronomer Johann von Lamont. [1] It is located to the southeast of the crater Arago.
Lamont has the shape of two roughly concentric but incomplete rings with an inner diameter of 60 km and an outer diameter of 120 km. (The official diameter is 75 km.) Radial ridges radiate away from the center of Lamont, except in the east and west quadrants. The ridge system is only a few hundred meters in height, with a width that averages 5 km but is thicker to the southeast. This feature is only readily visible at low angles of illumination, when shadows highlight the terrain features.
This feature is associated with a mass concentration (mascon), a sub-surface region of higher-density material. [2]
Anaximenes is a low-rimmed lunar impact crater near the north-northwest limb of the Moon. It lies to the west of the crater Philolaus, and northeast of Carpenter. To the northwest is Poncelet, close to the visible edge of the Moon.
Blagg is a tiny lunar impact crater located on the Sinus Medii. It is a circular crater with no appreciable erosion. To the east-southeast is the irregular crater Rhaeticus, and northeast lies Triesnecker. It is about 33 km to the east of the slightly larger Bruce. It was named after noted English astronomer Mary Adela Blagg. Its diameter is 5.0 km.
Brewster is a small lunar impact crater in the northern fringes of Sinus Amoris. It was named after the Scottish scientist, Sir David Brewster. Its diameter is 9.8 km. It lies to the southwest of the larger crater Römer. To the southeast of Brewster is the similar-sized Franck. This crater is cup-shaped and symmetrical, with no overlapping craters of note. A low ridge is attached to the northern rim. The crater interior has a relatively high interior albedo compared to the surrounding terrain.
Cajal is a small lunar impact crater on the northern part of the Mare Tranquilitatis. It was named after the Spanish doctor and Nobel laureate Santiago Ramón y Cajal. It is a circular, cup-shaped formation that lies southeast of the lava-inundated crater Jansen. Cajal was formerly designated Jansen F. Also to the northwest is a system of wrinkle ridges designated the Dorsa Barlow.
Arago is a lunar impact crater located in the western part of the Mare Tranquillitatis. It is named after French astronomer François Arago. Its diameter is 26 km. To the southwest lies the crater Manners, and beyond are Dionysius and the Ritter–Sabine crater pair. To the southeast is the large Lamont formation that has been submerged by the mare.
Delisle is a small lunar impact crater in the western part of the Mare Imbrium. It was named after French astronomer Joseph-Nicolas Delisle. It lies to the north of the crater Diophantus, and just to the northwest of the ridge designated Mons Delisle. Between Delisle and Diophantus is a sinuous rille named Rima Diophantus, with a diameter of 150 km. To the northeast is another rille designated Rima Delisle, named after this crater.
Fedorov is a lunar geologic feature located in the western Mare Imbrium named after Russian rocket scientist A. P. Fyodorov. It lies east-northeast of the crater Diophantus, and southeast of Delisle. About 20 kilometers to the south-southeast is the slightly larger formation of Artsimovich.
Korolev is a large lunar impact crater of the walled plain or basin type. It is named for Soviet rocket engineer Sergei Korolev. It lies on the far side of the Moon, and the northern part of its floor crosses the lunar equator. Notable nearby craters include Galois just to the southeast, Das to the south-southeast, Doppler attached to the southern rim, and Kibal'chich to the northeast. Rays of the crater Crookes cover parts of the basin.
De Morgan is a small lunar impact crater that is located in the central region of the Moon, midway between the crater D'Arrest two crater diameters to the south, and Cayley to the north. Its diameter is 9.7 km. It is named after British logician Augustus De Morgan.
Oppolzer is the remnant of a lunar impact crater that is located on the southern edge of Sinus Medii, along the meridian of the Moon. Its diameter is 41 km. It was named after the Austrian astronomer Theodor von Oppolzer. It is located within one crater diameter of the origin of the selenographic coordinate system at 0° N, 0° W. Attached to the surviving remnants of the southeast rim is the crater Réaumur. To the west-southwest is the lava-flooded walled plain Flammarion.
Damoiseau is a lunar impact crater that is located just to the west of the Oceanus Procellarum, in the western part of the Moon's near side. It lies due east of the prominent crater Grimaldi, a walled plain with a distinctive dark floor. Due south of Damoiseau is the crater Sirsalis.
Cori is a lunar impact crater that is located in the southern hemisphere on the far side of the Moon. It lies less than one crater diameter to the north of the crater Baldet. To the northeast is the crater Grissom. It is named after Gerty Cori, the first American woman to win the Nobel Prize and the first woman to win the prize in the category Nobel Prize in Physiology or Medicine.
Chevallier is a lunar impact crater that is located in the northeastern part of the Moon's near side, about a crater diameter east-southeast of the prominent crater Atlas. To the south-southeast of Chevallier is the flooded crater Shuckburgh.
Dyson is a lunar impact crater, 63 kilometers in diameter, that lies on the far side of the Moon, past the northwest limb. It is located in the northern part of the surface, to the northwest of the crater Coulomb, and east of van't Hoff.
Chauvenet is a lunar impact crater that is located to the northeast of the prominent crater Tsiolkovskiy on the far side of the Moon. Less than one crater diameter to the northwest of Chauvenet is the crater Ten Bruggencate.
Mons Hadley is a massif in the northern portion of the Montes Apenninus, a range in the northern hemisphere of the Moon. It has a height of 4.5 km (2.8 mi) 14,764 ft (4,500 m) above the adjacent plain and a maximum diameter of 25 km at the base.
Mons Esam is a small, isolated mountain in the northern part of the Mare Tranquillitatis. It is located to the southeast of the crater Vitruvius and to the west-northwest of Lyell. To the northeast of this ridge is the bay called Sinus Amoris.
Fibiger is a lunar impact crater located on the lunar near side near the northern pole. The nearest major feature is the Byrd crater. The crater was adopted and named after Danish pathologist Johannes Andreas Grib Fibiger in 2009 by the IAU. Located just north of Fibiger are craters Erlanger and Peary, which are 9.9 km and 73 km in diameter, respectively.
Gore is a lunar impact crater located on the lunar near side near the northern pole. Major nearby features include Florey crater to the Southeast, Peary crater to the East-Northeast, and Byrd crater to the Southeast. The crater was adopted and named after John Ellard Gore by the IAU in 2009.
Grignard is a lunar impact crater on the lunar near side near the northern pole. The crater is located Northeast of Sylvester crater and is directly adjacent to the Hermite crater. The crater was adopted and named after French chemist Victor Grignard by the IAU in 2009.