Coordinates | 63°30′N62°48′W / 63.5°N 62.8°W Coordinates: 63°30′N62°48′W / 63.5°N 62.8°W |
---|---|
Diameter | 130 km |
Depth | 5.0 km |
Colongitude | 60° at sunrise |
Eponym | Pythagoras |
Pythagoras is a prominent impact crater located near the northwestern limb of the Moon. It lies just to the northwest of the somewhat larger Babbage. The crater has an oval appearance due to the oblique viewing angle. Only the western face of the interior can be viewed from the Earth, the other side being permanently out of sight.
The well-preserved rim of Pythagoras has a wide terrace system, and a slight rampart around the exterior. Although generally circular, the crater outline has a hexagonal form. The floor is flattened, but with an irregular, hilly surface. There is evidence of landslips around the periphery. In the center is a sharp, mountainous rise with a double peak that ascends 1.5 kilometers above the crater floor.
Pythagoras is a crater of Eratosthenian age. [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 Pythagoras.
Pythagoras | Latitude | Longitude | Diameter |
---|---|---|---|
B | 66.1° N | 73.0° W | 17 km |
D | 64.5° N | 72.0° W | 30 km |
G | 67.8° N | 75.3° W | 16 km |
H | 67.1° N | 73.3° W | 18 km |
K | 67.3° N | 75.4° W | 12 km |
L | 67.3° N | 77.6° W | 12 km |
M | 67.5° N | 81.1° W | 10 km |
N | 66.6° N | 78.1° W | 14 km |
P | 65.3° N | 75.2° W | 10 km |
S | 67.7° N | 64.7° W | 8 km |
T | 62.5° N | 51.4° W | 6 km |
W | 63.1° N | 48.9° W | 4 km |
Andersson is a lunar impact crater that lies in the southern hemisphere on the far side of the Moon. It is located just beyond the southwestern limb of the visible Moon in a location that can be viewed from the side during a favorable libration. The nearest crater of note is Guthnick to the north-northeast.
Endymion is a lunar impact crater that lies near the northeast limb of the Moon. It is located to the east of Mare Frigoris and north of Lacus Temporis. To the southwest is the somewhat smaller crater Atlas. Because of its location, Endymion has an oval appearance from foreshortening. Beyond the crater along the lunar limb is the Mare Humboldtianum.
Boguslawsky is a lunar impact crater that is located near the southern lunar limb, to the northwest of the slightly larger crater Demonax, and southwest of the concentric crater Boussingault. Due to its location, this crater appears very oblong in shape because of foreshortening.
Adams is a lunar impact crater that is located in the rugged southeastern section of the Moon, near the lunar limb. It lies just to the southwest of the crater Legendre. To the northwest are the craters Hase and Petavius, and to the southwest is Furnerius. To the southwest of Adams is a system of rilles designated the Rimae Hase. The longest of these rilles follows a course to the southeast.
Alhazen is a lunar impact crater that lies near the eastern limb of the Moon's near side. Just to the south-southeast is the crater Hansen, and to the west is the Mare Crisium. The rim of Alhazen is nearly circular, but appears highly oblong when viewed from the Earth due to foreshortening. The inner walls and the crater floor are rugged and irregular. A low ridge joins the south rim of Alhazen with the nearby Hansen. The crater is named after the Arab Muslim scientist, Ibn al-Haytham.
Babbage is an ancient lunar impact crater that is located near the northwest limb of the Moon, named after Charles Babbage. It is attached to the southeastern rim of the prominent crater Pythagoras. The crater remnant named South intrudes into the southeastern floor of Babbage.
Chamberlin is a lunar impact crater that is located on the far side of the Moon, just past the southeastern limb. It lies to the southeast of the crater Jeans, and Moulton is attached to the southeastern rim of Chamberlin. This crater is located in a part of the lunar surface that has undergone resurfacing of crater interiors, producing dark-hued crater floors.
Brianchon is a lunar impact crater that is located along the northwestern limb of the Moon. Due to its location, from the Earth the crater is seen from the edge and its visibility is somewhat affected by libration. Thus for a more detailed view, the crater must be viewed from orbit.
Oenopides is a lunar impact crater that is located near the northwestern limb of the Moon, and so appears foreshortened when viewed from the Earth. This formation lies due south of the prominent crater Pythagoras, and is attached to the southwest rim of Babbage E. The southwest rim of Oenopides is part of the northern edge of Oceanus Procellarum. To the south is Markov.
Bjerknes is a lunar impact crater that is located in the southern hemisphere on the rugged far side of the Moon. The crater lies behind the southeastern limb, and beyond the region that is sometimes brought into sight through libration. Thus this crater can not be viewed from Earth, and has only been seen from orbit. Nearby named craters are Clark to the east, and Pogson to the south-southwest.
De Roy is a lunar impact crater that is located on the far side of the Moon, just behind the southwestern limb. This portion of the lunar surface is brought into view during favorable librations, allowing observation of this formation. However the crater is viewed from the side when watched from the Earth, and little detail can be seen. De Roy lies to the west of the crater Arrhenius, and east of the larger Boltzmann.
Casatus is a lunar impact crater that is located near the southern limb of the Moon. The north-northeast rim of the crater overlies a portion of the slightly larger crater Klaproth. Along the western rim, Casatus A intrudes somewhat into the interior, producing an inward-bowing rim. To the southeast of Casatus is Newton.
Elmer is a small lunar impact crater that is located to the south of Mare Smythii, near the eastern limb of the Moon. This crater is seen at a highly oblique angle from Earth, and the visibility is affected by libration. Elmer lies southwest of the crater Kreiken, and east-southeast of the larger Dale. This is a circular, bowl-shaped crater with an interior floor that occupies about half the total diameter.
Cleostratus is a lunar impact crater near the northwest limb of the Moon. It lies to the northeast of the crater Xenophanes, and west-southwest of the prominent Pythagoras. From the Earth this crater appears highly elongated due to foreshortening.
Cannizzaro is a lunar impact crater that is located on the Moon's far side as seen from the Earth, just beyond the northwestern limb. It lies in a region of the surface that is sometimes brought into view due to the effects of libration, but not much detail can be seen since this feature is viewed from the side. The crater lies across the southwestern rim of the much larger-walled plain Poczobutt.
Couder is a small lunar impact crater that is located just behind the western limb of the Moon, in a region of the surface that is brought into view during favorable librations. It lies on the inner foothills of the Montes Cordillera, a ring-shaped mountain range that surrounds the Mare Orientale impact basin.
Eimmart is a lunar impact crater that is located near the east-northeastern limb of the Moon, to the northeast of the Mare Crisium. The northern and eastern outer rim of this crater borders on the narrow Mare Anguis. To the northwest of Eimmart are the smaller crater Delmotte and the prominent Cleomedes.
Eichstadt is a lunar impact crater that is located in the eastern section of the Montes Cordillera range that encircles the Mare Orientale impact basin. It lies toward the southwestern limb of the Moon, and so appears oblong when viewed from the Earth due to foreshortening. Over 200 kilometers to the east of Eichstadt are the craters Darwin and Lamarck, and to the south is Krasnov.
Chappe is a lunar impact crater that lies along the southwestern limb of the Moon. It is nearly attached to the northern limb of the walled plain Hausen, and an equal distance from the crater Pilâtre. To the north-northwest is Blanchard.
Donner is a lunar impact crater on the far side of the Moon. It is located just to the northeast of the Mare Australe, behind the southeastern limb of the Moon. During favorable librations this part of the lunar surface can be brought into view of the Earth, but the site is viewed from the edge and so not much detail can be seen.