75.Hagecius

Part of the south eastern edge of the visible part of the Moon. We see a group of big craters around Hagecius. We orientate ourselves using the crater Hommel. It has a number of smaller craters across the rim of the crater forming a striking massif.

BIELA - Wilhelm von Biela (1782 - 1856) Austrian officer and astronomer of Czech decent. Discovered the comet Biela.

Crater. (76km Ø ) (Dept: 3,100m) (54.9°S, 51.3°E) The rim of this crater is overlaid by a pair of craters: Biela C across the northeast rim and Biela W along the western inner wall

BOUSSINGAULT - Jean Babtiste D. Boussingault (1802 - 1887) French agro-chemist and botanist.

Crater. (131km Ø ) (Dept: 3,200m) (70.4°S, 54.7°E) A large crater that lies within the outer walls, so that it looks like a double-walled formation.

GILL - Sir David Gill (1843 - 1914) Scottish astronomer, compiler of a star catalogue.

Crater.  (64km Ø ) (Dept: 3,930m) (63.79° S, 75.92° E° ) On June 11, 2009, the Japanese SELENE lunar orbiter spacecraft was deliberately crashed into the surface of the Moon to the southeast of Gill. The impact site was at selenographic coordinates 65.5 S, 80.4 E. The flash from the impact was successfully observed from Mount Abu Observatory in Gurushikar, India. and by the Anglo-Australian Telescope.

HAGECIUS - Tadeás Hájek z Hájku (1525 - 1600) Czech astronomer physicist, and mathematician.

Crater.  (80km Ø ) (Dept: 3,970m) (59.98° S, 46.72° E) Outer rim irregular. The southeastern rim overlaid by three smaller craters, Hagecius C, B, and G.

HALE - 1. George Ellery Hale (1858 - 1938) American astronomer and Solar astronomer. 2. William Hale (1797 - 1870) English rocket-specialist.

Crater. (84km Ø ) (Dept: 4,200m) (74.14° S, 91.66° E) Circular, terraced walls, small central mountain.

HELMHOLTZ - Hermann von Helmholtz (1821- 1894) German physicist, mathematician and surgeon.

Crater. (103km Ø ) (Dept: 4,410m) (68.52° S, 65.24° E) Irregular, southern rim damaged, crater field of small craters on the floor.

HOMMEL - Johann Hommel (1518 - 1562) German mathematician and astronomer.

Crater. (120km Ø ) (Dept: 2,800m) (54.6°S, 33.0°E) Remains of a walled plain, overlapped by satellite craters.

NEARCH - Nearchos (ca.352 BC) Greek general and friend of Alexander the Great.

Crater. (76km Ø ) (Dept: 2,900m) (58.5°S, 39.1°E) Nearch A, a 43-kilometer-diameter crater intrudes into the southeastern rim of Nearch.

NEUMAYER - Georg B. von Neumayer (1826 - 1909) German geo-physicist, hydrologist, meteorologist and explorer.

Crater. ( 80km Ø ) (Dept: 3,770m) (71,24° S, 70,78° E) Eroded, rim intact, craterlets.

PITISCUS - Bartholomaeus Pitiscus (1561 - 1613) German theologian and mathematician.

Crater. (82km Ø ) (Dept: 3,000m) (50.4°S, 30.9°E) Floor resurfaced, central floor.

75.