44. Ptolemaeus

44. Ptolemaeus

Central part of the visible halve of the Moon. Wide walled plains. In the north the plains of Sinus Medii with its rilles along the edges.

ALBATEGNIUS - Mohammed ibn Dshabir al Battani, (محمد بن جابر بن سنان البتاني ) Arabian astronomer and mathematician. (850 - 929 AD).

Crater. (129 km /80 Mi Ų ) (Dept: 4,400m /14,436 ft) (11.2°S, 3.96°E) Walled plain, surrounded by the high, terraced rim.

ALPHONSUS - Alphonsus X (1221 - 1284) King of Castilia and Léon, astronomer.

Crater. (119 km /74 Mi Ų ) (Dept: 2.700 m /8,858 ft) (13.38° S, 2.9° W) Walled plane with a 1,500m high central peak Alphonsus Alpha.

FLAMMARION - Camille Flammarion (1842 - 1925) French astronomer. First to suggest the names Triton and Amalthea for moons of Neptune and Jupiter.

Crater. (76 Km/47 Mi Ų ) (Dept: 1,510 m /4,954 ft) (3.34° S, 3.77° W) Worn outer wall broken in the northwest, remainder is eroded and damaged.

GYLDEN - Hugo Gylden (1841-1896) Finnish astronomer, known for work in celestial mechanics.

Crater. (47 km /29 Mi Ų ) (Dept: 1,800 m /5,905 ft) (5.3° S, 0.28° E) Heart-shaped rim eroded.

HERSCHEL - Friedrich Wilhelm Herschel (1738-1822) English - German astronomer, discovered the planet Uranus in 1781. Discovered the existence of infrared radiation.

Crater. (41 km /25 Mi Ų ) (Dept: 3,800 m /12,467 ft) (5.7° S, 2.13° W) Circular, central mountain, terraced.

HIPPARCHUS - Hipparchus of Niacaea (Ἵππαρχος) (190 - 125 BC) Greek astronomer, geographer, and mathematician, the founder of trigonometry, discoverer of precession of the equinoxes.

Crater. (150 km /93 Mi Ų ) (Dept: 3.300 m /10,827 ft) (5.36° S, 4.87° E) Eroded. Floor flooded.

KLEIN - Hermann J. Klein (1844-1914) German Selenographer.

Crater. (43 km /27 Mi Ų ) (Dept: 1.460 m /4,790 ft) (12.01° S, 2.48° E) Rim worn and incised.

SINUS MEDII - Latin name for the Bay of the Middle. Named by Michael Van Langren on his 1645 map. (Other sources note it was named by Johann Heinrich von Mädler at a later date).

Bay. (170 km × 335 km /106 Mi × 208 Mi ) (2.4° N, 1.7° E) Oval shaped. Landing site of the Surveyor 4 and Surveyor 6 missions, both landed to the west-southwest of Bruce crater.

MÜLLER - Karl Müller (1866 - 1942) Austrian - Czech Selenographer and amateur astronomer. He worked together with Mary Adela Blagg on standardizing the nomenclature of lunar formations.

Crater. (24 × 20 km /12 × 15 Mi Ų ) (Dept: 2,000 m /6,562 ft) (7.6°S, 2.1°E) The rim of this crater is irregular and slightly oval.

OPPOLZER - Theodor von Oppolzer (1861-1930) Austrian - Bohemian astronomer and mathematician.

Crater. (43km /27Mi Ų ) (1.52°S, 0.46°W) Flooded, rim eroded and partly missing.

44.

PTOLEMAEUS - Claudius Ptolemaeus (Κλαύδιος Πτολεμαῖος) (90 - 160 AD) Greek Astronomer from Alexandria.

Crater. (153km /95Mi Ų ) (Dept: 2,400 m /7,874 ft) (9.12° S, 1.85° W) Walled plain. Floor flooded.

RÉAUMUR - René-Antoine Ferchault de Réaumur (1683 - 1757) French Physicist.

Crater. (53 km /33 Mi Ų ) (Dept: 1,300 m /4,265 ft) (2.44° S, 0.75° E) Heavily eroded, floor flooded.

SEELIGER - Hugo Hans Ritter von Seeliger (1849 - 1924) German astronomer.

Crater. (9 km /5.6 Mi Ų ) (Dept: 1,810 m /5,938 ft) (2.24° S, 2.97° E) Circular, cup-shaped, not eroded.

SPÖRER - Gustav Friedrich Spörer (1822 - 1895) German solar-astronomer. Noticed as first the Maunder Minimum.

Crater. (28 km /17 Mi Ų ) (Dept: 320 m /10,50 ft) (4.3° S, 1.8° E) Circular, flooded by lava, leaving only a shallow rim left.

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