Seyfert (crater)

Last updated
Seyfert
Seyfert crater AS16-M-3001 ASU.jpg
Oblique Apollo 16 image (facing northwest)
Coordinates 29°06′N114°36′E / 29.1°N 114.6°E / 29.1; 114.6 Coordinates: 29°06′N114°36′E / 29.1°N 114.6°E / 29.1; 114.6
Diameter 110 km
Depth Unknown
Colongitude 247° at sunrise
Eponym Carl K. Seyfert
Oblique Lunar Orbiter 5 image (facing west) Seyfert crater 5163 med.jpg
Oblique Lunar Orbiter 5 image (facing west)
Oblique Apollo 14 Hasselblad camera image (facing northeast) Seyfert crater AS14-75-10306.jpg
Oblique Apollo 14 Hasselblad camera image (facing northeast)

Seyfert is a prominent lunar impact crater that is located on the far side of the Moon. It was named after American astronomer Carl Keenan Seyfert. [1] It lies behind the eastern limb of the Moon, to the east of the crater Espin. Just to the north of Seyfert is the crater Harriot and equally close to the south is Polzunov.

Contents

The outer rim of this crater is slightly elongated to the north, and the northeastern rim is overlain by the satellite crater Seyfert A. This overlapping impact crater has a central ridge on its interior floor. There is a low ridge near the midpoint of Seyfert, but it is less prominent. The inner wall of Seyfert is wider along the northern edge, west of Seyfert A.

Several small craters lie along the rim and interior of Seyfert, including a merged group of small craters along the eastern inner wall, a small crater intruding into the southeastern rim, and a pair of small craters along the southern rim of Seyfert A. The interior floor of Seyfert is relatively level, and is marked by a number of tiny craterlets. Traces of the ray system from Giordano Bruno to the northwest lie along the rim and interior floor of Seyfert.

Satellite craters

By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Seyfert.

SeyfertLatitudeLongitudeDiameter
A30.5° N114.9° E53 km

Related Research Articles

Aitken (crater) Lunar impact crater

Aitken is a large lunar impact crater that lies on the far side of the Moon, named for Robert Grant Aitken, an American astronomer specializing in binary stellar systems. It is located to the southeast of the crater Heaviside, and north of the unusual formation Van de Graaff. Attached to the southwest rim is Vertregt. To the southeast is the smaller Bergstrand.

Cavalerius (crater)

Cavalerius is a prominent lunar impact crater that lies on the western edge of the Oceanus Procellarum lunar mare on the west part of the visible Moon. It nearly joins the northern rim of Hevelius to the south.

Bianchini (lunar crater)

Bianchini is a lunar impact crater that lies along the northern Jura Mountains that ring the Sinus Iridum, in the northwestern part of the near side of the Moon. It was named after Italian astronomer Francesco Bianchini. The impact of this crater near the edge of the Jura Mountains deposited some material into the Sinus Iridum floor.

Biela (crater) Lunar impact crater

Biela is a lunar impact crater that is located in the rugged highlands of the southeastern Moon. It is named after Austrian astronomer Wilhelm von Biela. The crater lies to the east of Rosenberger, to the southeast of the Watt–Steinheil double crater.

Casatus (crater) Lunar impact crater

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.

Drygalski (crater) Lunar surface depression

Drygalski is a large lunar impact crater that lies along the southern limb of the Moon. It partly overlies the crater Ashbrook to the west on the far side of the Moon. Just to the north of Drygalski is the smaller Boltzmann. The location of this crater restricts its observation from the Earth, and even under conditions of favorable libration it is viewed from the edge. It is only illuminated by the Sun at an oblique angle, and it lies close to the south polar craters that are permanently shielded from sunlight.

dAlembert (crater) Lunar impact crater

d'Alembert is a large lunar impact crater located in the northern hemisphere on the far side of the Moon, to the northeast of the somewhat smaller walled plain Campbell. Astride the southwest rim of d'Alembert is Slipher. To the north is the crater Yamamoto, and to the south-southwest lies Langevin. This walled plain has the same diameter as Clavius on the near side, making it one of the largest such formations on the Moon.

Dyson (crater) Lunar impact crater

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.

Euctemon (crater) Lunar impact crater

Euctemon is a lunar impact crater that is located in the northern part of the Moon, along the northwest rim of the crater Baillaud. To the southwest of Euctemon is the large walled plain Meton, and to the north-northeast lies the crater De Sitter. Due to its location, Euctemon appears foreshortened when viewed from the Earth.

Comrie (crater) Lunar impact crater

Comrie is a lunar impact crater. It is located on the rugged far side of the Moon relative to the Earth, beyond the western limb. Nearby craters of note include Ohm to the south-southwest, Shternberg to the southwest, and Parenago to the northeast.

Congreve (crater) Lunar impact crater

Congreve is a lunar impact crater that is located on the far side of the Moon relative to the Earth, and lies across the lunar equator. It lies to the west-northwest of the massive walled plain Korolev. To the southeast is the crater Icarus, and due north is Zhukovskiy.

Phillips (lunar crater) Lunar impact crater

Phillips is a lunar impact crater that is located in the vicinity of the Moon's east-southeastern limb, named after British geologist John Phillips. The larger walled plain Humboldt lies across the eastern rim of Phillips, and the outer rampart covers nearly half the interior floor. The surviving rim is eroded in places, and not quite circular.

Ricco (crater)

Ricco is a lunar impact crater. It is located in the northern part of the Moon's far side. This crater overlies the southeastern rim of the larger crater Milankovic. Less than one crater diameter to the southwest is Karpinskiy, while to the southeast is Roberts.

Douglass (lunar crater) Lunar impact crater

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.

Donner (crater) Lunar impact crater

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.

Evdokimov (crater)

Evdokimov is a lunar impact crater on the far side of the Moon. It lies to the east of the crater Evershed, and west-southwest of Gadomski. This is a worn and eroded feature with a somewhat indistinct outer rim that is little more than a slight ridge in the surface. The rim is better formed along the western and eastern sides. A small crater with a relatively high albedo lies along the inner wall to the northeast, and is surrounded by a small, bright skirt of ejecta. The interior floor is nearly featureless, with only a few indistinct small crater rims marking the surface.

Laue (crater)

Laue is a lunar impact crater that lies across the south-southwestern rim and interior floor of the huge walled plain Lorentz. This feature is located on the Moon's far side, just beyond the west-northwestern limb. Under conditions of favorable libration and illumination from the Sun, this area can be seen at a very oblique angle from the Earth.

Levi-Civita (crater)

Levi-Civita is a lunar impact crater formation that lies on the far side of the Moon. It was named after Italian mathematician Tullio Levi-Civita. It is located just to the southwest of the large walled plain Gagarin, and nearly as close to the crater Pavlov to the south-southwest. To the northwest of Levi-Civita lies the smaller crater Pirquet.

Wiener (crater)

Wiener is a lunar impact crater that lies on the Moon's far side. It is located just to the southwest of the larger crater Campbell. To the southwest of Wiener is the heavily worn Kurchatov. To the east along the rim of Campbell is Von Neumann. The smaller crater Pawsey lies to the north-northwest, and is partly overlain by the outer rampart of Wiener.

Olcott (crater)

Olcott is a relatively fresh crater on the far side of the Moon. It was named after American astronomer William Tyler Olcott. It lies to the south-southeast of the craters Seyfert and Polzunov, and to the north of Kostinskiy.

References

Citations
  1. "Seyfert (crater)". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.