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LRO image | |
Coordinates | 20°06′N70°36′E / 20.1°N 70.6°E Coordinates: 20°06′N70°36′E / 20.1°N 70.6°E |
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Diameter | 112 km |
Depth | None |
Colongitude | 288° at sunrise |
Eponym | Johann J. Balmer |
Balmer is the lava-flooded remains of a lunar impact crater. Only the heavily worn southern and eastern sections of the crater still survive; the remainder being overlaid by a lava flow that joins to the nearby mare. Balmer lies to the east-southeast of the crater Vendelinus.
Balmer was considered a Constellation Region of Interest. [1] Light plains deposits overly mare basalt, as evidenced by multiple dark-halo craters. [2]
By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Balmer.
Balmer | Latitude | Longitude | Diameter |
---|---|---|---|
M | 20.7° S | 71.5° E | 5 km |
N | 19.9° S | 69.9° E | 8 km |
P | 20.4° S | 67.7° E | 13 km |
Q | 18.7° S | 70.5° E | 7 km |
R | 18.7° S | 69.1° E | 4 km |
S | 18.4° S | 67.6° E | 6 km |
Wichmann is a bowl-shaped lunar impact crater. It was named after German astronomer Moritz L. G. Wichmann. It is located in the southern half of Oceanus Procellarum on a low plateau formed from a wrinkle ridge, Dorsa Ewing.
Beaumont is a lava-flooded crater located on the southwestern shore of the Mare Nectaris on Earth's Moon. It lies to the northwest of the similarly flooded crater remnant Fracastorius. To the west is the prominent crater Catharina. The crater is named after French geologist Léonce Élie de Beaumont.
Fracastorius is the lava-flooded remnant of an ancient lunar impact crater located at the southern edge of Mare Nectaris. To the northwest of this formation lies the crater Beaumont, while to the northeast is Rosse.
Seleucus is a lunar impact crater located in the western part of Oceanus Procellarum. To the west is the lava-flooded remains of the walled plain Eddington. To the southwest is the crater Krafft and to the northwest lies Briggs.
Aldrin is a small impact crater located on the southern part of the Mare Tranquillitatis, to the east of Sabine. It is located about 50 kilometers to the northwest of the Apollo 11 landing site, Tranquility Base. Named after Buzz Aldrin, the crater is the westernmost of a row of three craters named in honor of the Apollo 11 crew members. About 30 kilometers to the east is the landing site of the Surveyor 5 lunar probe.
Lick is a lunar impact crater that has been flooded with basaltic lava. This crater was named in memory of James Lick, a Californian philanthropist. The north rim is attached to the smaller, bowl-shaped crater Greaves. Lick lies on the southwest edge of Mare Crisium. Its rim is broken at the north and south ends, and the southwest rim is attached to the crater remnant Lick A. There is a small, flooded crater within the southern part of Lick's inner floor, and several tiny craters mark the interior surface. A small, unnamed crater at the east rim has a bright ray system.
Carrel is a small lunar crater on the Mare Tranquillitatis. It has a somewhat distorted appearance, having a slight protruding bulge in the northwest rim. The interior is somewhat irregular, with ridges and some slumped material. This crater lies across a ridge in the surface of the mare.
Apollonius is a lunar impact crater located near the eastern limb of the Moon. It lies in the region of uplands to the west of Mare Undarum and northeast of the Sinus Successus on the Mare Fecunditatis. It was named after Greek mathematician Apollonius of Perga. It is southwest of the crater Firmicus, and north of Condon.
Taruntius is a lunar impact crater on the northwestern edge of Mare Fecunditatis. It was named after ancient Roman philosopher, mathematician and astrologer Lucius Tarutius Firmanus. To the northwest is the lava-flooded crater Lawrence, and to the north lie the craters Watts and da Vinci.
Lee is the lava-flooded remnant of a lunar impact crater that lies on an inlet of the Mare Humorum, in the southwestern part of the Moon. It was named after British astronomer John Lee. To the east is the crater Vitello, and just to the north is the lava-flooded crater Doppelmayer.
Tsiolkovskiy is a large lunar impact crater that is located on the far side of the Moon. Named for Russian scientist Konstantin Tsiolkovsky, it lies in the southern hemisphere, to the west of the large crater Gagarin, and northwest of Milne. Just to the south is Waterman, with Neujmin to the south-southwest. The crater protrudes into the neighbouring Fermi, an older crater of comparable size that does not have a lava-flooded floor.
Apollo is an enormous impact crater located in the southern hemisphere on the far side of the Moon. This formation dwarfs the large crater Oppenheimer that is located next to the western rim. The crater Barringer lies across the northern wall. To the southeast is the crater Anders, and Kleymenov is just to the east of the rim.
D'Arrest is a lunar impact crater that is located in the lava-flooded region to the west of the Mare Tranquillitatis. It is named after the German astronomer Heinrich Louis d'Arrest. It lies to the southeast of the crater Agrippa and northwest of Delambre. Just to the northeast are the small, bowl-shaped craters De Morgan and Cayley.
Bowditch is a lunar impact crater that lies on the far side of the Moon, just beyond the eastern limb. It is located on a region of the lunar surface that is brought into view due to libration, but at such times the area is viewed from the edge and so not much detail can be observed. It lies just to the north of the small Lacus Solitudinis lunar mare, between the craters Titius to the southwest and Perel'man to the east-northeast.
Cayley is a small lunar impact crater that is located in a lava-flooded region to the west of Mare Tranquillitatis. It was named after the 19th century British mathematician Arthur Cayley. It lies to the northwest of the smaller crater De Morgan and the larger D'Arrest. West and slightly north of Cayley is Whewell, a crater of about the same dimensions. To the north is a linear rille designated Rima Ariadaeus, which follows a course to the east-southeast.
Cook is a lunar impact crater that lies in the western part of the Mare Fecunditatis, just to the southeast of the prominent crater Colombo. To the southwest is Monge.
Crozier is a lunar impact crater that is located on the southwest edge of Mare Fecunditatis, a lunar mare in the eastern part of the Moon's near side. It lies to the east-northeast of the prominent crater Colombo, and southeast of the small crater Bellot.
Daubrée is a lunar impact crater that is located to the southwest of the Mare Serenitatis, just to the west-southwest of the crater Menelaus in the Montes Haemus range. The small lunar mare Lacus Hiemalis lies along the southwest rim of Daubrée. The crater was named after French geologist Gabriel A. Daubrée. It was previously designated Menelaus S.
Raman is a small lunar impact crater that lies on the western edge of a plateau feature in the expansive lunar mare named Oceanus Procellarum. It shares this plateau with the lava-flooded Herodotus and Aristarchus to the southeastern. To the northeast of Raman is the small peak named Mons Herodotus. To the northwest on the mare is the long, narrow range named the Montes Agricola.
Widmannstätten is a lunar impact crater in the southern part of the Mare Smythii, near the eastern limb of the Moon. The rim of this crater has a wide gap along the western side, where it is joined to the larger Kiess. There is also a gap in the northern rim where the crater floor is joined to the adjacent lunar mare. The dark interior floor of this formation has been flooded by lava, leaving a level interior surface and a shallow surviving rim.