Lunar Orbiter 4 image | |
Coordinates | 26°54′S7°54′E / 26.9°S 7.9°E Coordinates: 26°54′S7°54′E / 26.9°S 7.9°E |
---|---|
Diameter | 63.44 km |
Depth | 2.08 km |
Colongitude | 356° at sunrise |
Eponym | Petrus Apianus |
Apianus is a lunar impact crater that is located on the rugged south-central highlands of the Moon. It is named after 16th century German mathematician and astronomer Petrus Apianus. [1] [2] It is located to the northeast of the crater Aliacensis, and to the northwest of Poisson. The worn crater Krusenstern is attached to the west-northwestern rim.
The outer wall of the crater has been worn and eroded by subsequent impacts, and a pair of small craterlets overlay the rim to the southeast and northeast. The central crater is 63 kilometers in diameter and 2,080 meters deep. [1] The craterlet on the southeast rim, Apianus B, is a member of a cluster of co-joined craterlets that includes Apianus T and Apianus U. The interior floor of the central crater is relatively smooth and lacks a central peak, although the surface appears somewhat convex. Only a few tiny craterlets mark the surface. [3]
The crater is from the Nectarian period, 3.92 to 3.85 billion years ago. [1]
By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Apianus. [4]
Apianus | Latitude | Longitude | Diameter | Ref |
---|---|---|---|---|
A | 25.7° S | 6.6° E | 13.11 km | WGPSN |
B | 27.4° S | 9.0° E | 10.21 km | WGPSN |
C | 28.1° S | 10.5° E | 19.64 km | WGPSN |
D | 26.1° S | 10.7° E | 33.66 km | WGPSN |
E | 28.8° S | 8.2° E | 8.39 km | WGPSN |
F | 28.1° S | 6.4° E | 5.39 km | WGPSN |
G | 28.1° S | 7.7° E | 4.02 km | WGPSN |
H | 28.1° S | 8.7° E | 6.57 km | WGPSN |
J | 26.3° S | 8.6° E | 6.71 km | WGPSN |
K | 27.4° S | 9.3° E | 6.44 km | WGPSN |
L | 29.1° S | 10.9° E | 4.67 km | WGPSN |
M | 24.7° S | 10.3° E | 6.98 km | WGPSN |
N | 28.8° S | 9.9° E | 3.46 km | WGPSN |
P | 25.2° S | 9.2° E | 41.59 km | WGPSN |
R | 25.7° S | 8.9° E | 13.1 km | WGPSN |
S | 25.6° S | 8.5° E | 23.96 km | WGPSN |
T | 27.7° S | 9.5° E | 11.52 km | WGPSN |
U | 27.9° S | 9.0° E | 16.82 km | WGPSN |
V | 25.3° S | 10.5° E | 3.2 km | WGPSN |
W | 25.5° S | 7.4° E | 9.68 km | WGPSN |
X | 28.3° S | 7.1° E | 3.1 km | WGPSN |
Arzachel is a relatively young lunar impact crater located in the highlands in the south-central part of the visible Moon, close to the zero meridian. It lies to the south of the crater Alphonsus, and together with Ptolemaeus further north the three form a prominent line of craters to the east of Mare Nubium. The smaller Alpetragius lies to the northwest, and Thebit is to the southwest along the edge of the mare.
Street is a lunar impact crater located just to the south of the prominent ray crater Tycho. Street lies within the skirt of high-albedo ejecta from Tycho, and it is more heavily worn than its younger and larger neighbor. There are several smaller craters joined to the western rim, as well as two craters along the eastern rim. The floor is relatively smooth and flat, except for a small craterlet in the western half. The crater is 58 kilometres (36 mi) in diameter and 1,500 metres (4,900 ft) in depth. It may be from the Pre-Imbrian period, which lasted from 4.55 to 3.85 billion years ago. It is named for the 17th-century English astronomer Thomas Street.
Rhaeticus is a lunar impact crater that lies astride the equator of the Moon, on the southeast edge of the Sinus Medii. To the north-northwest is the crater Triesnecker, and due south can be found the worn remnant of the walled plain Hipparchus. The crater was named after Austrian astronomer Georg Joachim Rheticus.
Abulfeda is a lunar impact crater located in the central highlands of the Moon. To the northeast is the crater Descartes, and to the south-southeast is Almanon. To the north is the crater Dollond. A chain of craters named the Catena Abulfeda runs between the southern rim of Abulfeda and the north rim of Almanon, then continues for a length of 210 kilometers across the Rupes Altai. The crater was named for 14th century Syrian-born Kurdish historian Ismael Abul-fida.
Herschel is a lunar impact crater located just to the north of the walled plain Ptolemaeus. Its diameter is 39 km. It was named after German-born British astronomer William Herschel.
Lansberg is a lunar impact crater on the Mare Insularum. It can be located by following a line south-southwest from Copernicus to Reinhold, then southwest to Lansberg. The crater has a high rim and a central mountain. There are terraces along the inner walls, and the tops have slumped to produce a sharp edge. This formation is not noticeably eroded, and there are no significant impact craters within the interior.
Aliacensis is a lunar impact crater that is located in the rugged southern highlands of the Moon. The crater Werner is located just to its north-northwest, and a narrow, rugged valley lies between the two comparably sized formations. To the southwest is Walther, and Apianus is to the northeast. Aliacensis is named after the 14th century French geographer and theologian Pierre d'Ailly. It is from the Nectarian period, which lasted from 3.92 to 3.85 billion years ago.
Almanon is a lunar impact crater that lies in the rugged highlands in the south-central region of the Moon. It was named after Abbasid Caliph and astronomer Al-Ma'mun. It is located to the south-southeast of Abulfeda, and to the north-northeast of the smaller crater Geber. The crater chain designated Catena Abulfeda forms a line between the south rim of Abulfeda and the north rim of Almanon, continuing for a length of about 210 kilometers to the Rupes Altai scarp.
Anděl is a lunar impact crater that lies in the rugged central highlands of the Moon. It was named after the Czech astronomer Karel Anděl. Nearby craters of note include Abulfeda to the south-southeast and Descartes to the east-southeast. About 85 kilometres to the east-northeast of the outer rim is the landing site of the Apollo 16 mission.
Azophi is a lunar impact crater that lies in the rugged south-central highlands of the Moon. The crater is named after the 10th-century Persian astronomer Abd Al-Rahman Al Sufi, also known by his western name, Azophi. The northwest rim is attached to the slightly smaller crater Abenezra, to the east-southeast is the large and irregular Sacrobosco, and to the west-southwest is the slightly crater Playfair.
Donati is a lunar impact crater that is located in the rugged south-central highlands of the Moon. It lies just to the northwest of the crater Faye, and the two outer rims are separated by a gap of less than 10 kilometers. To the north is the comparably sized Airy, and farther to the southeast is Playfair. Donati is 36 kilometers in diameter.
Palisa is the remnant of a lunar impact crater that is located to the west of the walled plain Ptolemaeus. It lies to the north-northeast of the crater Davy, and is attached to the lava-flooded satellite crater Davy Y by a wide break in the southwest rim. The crater is named after the Austrian astronomer Johann Palisa.
Nicolai is a lunar impact crater that is located in the southern hemisphere of the Moon, in a region that is less disturbed by significant impacts than most of the highlands. The nearest craters of note are Spallanzani to the south, and the much larger Maurolycus and Barocius to the east. The crater is named after the 19th-century German astronomer Friedrich Bernhard Gottfried Nicolai. It is 42 kilometers in diameter and reaches a depth of 1.8 kilometers.
Bečvář is a lunar impact crater that is located near the equator on the far side of the Moon. It was named after Czechoslovakian astronomer Antonín Bečvář. It lies to the northeast of the crater Necho, within that feature's ray system. To the north-northeast is the crater Gregory.
Steinheil is a lunar impact crater that is located in the rugged highlands in the southeastern part of the Moon. It was named after German astronomer and physicist Carl August von Steinheil. It forms a prominent crater pair with the similar-sized Watt, which it partly overlies to the southeast. To the northwest is the large walled plain Janssen. Due to the location of this crater, it appears foreshortened when viewed from the Earth. It is from the Nectarian period, 3.92 to 3.85 billion years ago.
Helmholtz is a lunar impact crater, approximately 110 kilometers in diameter, that is located near the south-southeast limb of the Moon. Attached to the south-southeast rim of Helmholtz is the somewhat smaller crater Neumayer. The larger crater Boussingault is nearly attached to the west-southwestern rim.
Nearch is a lunar impact crater that is located in the southeastern part of the Moon, to the southeast of the crater Hommel. North of Nearch is Vlacq, and to the northeast lies Rosenberger. The crater is 76 kilometers in diameter and 2.9 kilometers deep. It is from the Pre-Nectarian period, 4.55 to 3.92 billion years ago.
Krusenstern is a lunar impact crater that lies amidst the battered terrain in the southern part of the Moon's near side. Nearly attached to the east-southeast rim is the crater Apianus. Less than one crater diameter to the southwest is the prominent Werner. Krusenstern is intruding into a large circular plain to the north designated Playfair G. Playfair itself lies to the northeast.
Dreyer is the remnant of a lunar impact crater on the far side of the Moon. It is located along the eastern edge of the Mare Marginis, about midway between the craters Ginzel to the north and Erro to the south-southeast. It was named after Danish-Irish astronomer John L. E. Dreyer.
Prager is an impact crater on the Moon's far side. It was named after German-American astronomer Richard Prager. It is located just to the northeast of the crater Love. Farther to the south-southeast lies Lane. To the north of this crater and leading away to the northwest is a crater chain that has been designated Catena Gregory.
Wikimedia Commons has media related to Apianus (crater) . |