49.Langrenus

In-between the eastern edge of Mare Fecunditatis and the eastern edge of the visible part of the Moon we find a crater field with many craters, which makes it hard to find our baring. Specially worth observing through a telescope, the crater Langrenus. At a favorable libration we can see the dark plains of mare Smythii.

ANSGARIUS - St. Ansgar (801 - 864) The apostle of the north.

Crater. (94km/58Mi ø ) (Dept: 2.200m /7.218ft) (12.94°S, 79.7°E) Terraced walls. Flat floor with craterlets.

MARE FECUNDITATIS - Sea of Fertility. Named so by Riccioli.

Mare. (840Km /522Mi ø ) (326,000 km² /125,870Mi² ) (7.83°S, 51.67°E) Irregularly shaped, the size of the Caspian Sea on Earth.

GILBERT - 1. Grove K. Gilbert (1843 - 1918) American geologist. In 1891 Gilbert examined the possible origins for a crater in Arizona, now known as Meteor Crater. 2. William Gilbert (1544 – 1603) English physician, physicist, astronomer and natural philosopher.

Crater. (107km /66Mi ø ) (Dept: 3,700m/12.139ft) (3.22°S, 76.12°E) Degraded walled plain, with an outer rim that has been reshaped by nearby impacts.

KAPTEYN - Jacobus C. Kapteyn (1851 - 1922) Dutch astronomer, best known for his extensive studies of the Milky Way, and as the first discoverer of evidence for galactic rotation.

Crater. (49Km/30Mi ø ) (3.710m/12.172ft) (10.80°S, 70.51°E) Circular with a central peak.

KÄSTNER - Abraham Gotthelf Kästner (1719- 1800) German Physicist and mathematician.

Crater. (109km /68Mi ø ) (Dept: 3,200m /10.499ft) (6.77°S, 78.91°E) Wall eroded, floor level.

LAMÉ - Gabriel Lamé (1795 – 1870) French mathematician.

Crater. (84km /52Mi ø ) (Dept: 3.590m /11.778ft) (14.69°S, 64.48°E ) Circular, low rim. Floor deformed by smaller impacts.

LANGRENUS - Michael Florent van Langren (1600 -1675) Flemish mathematician and engineer. Drew the first Lunar maps which named formations.

Crater. (132km /82Mi ø ) (Dept: 2,700m /8.858ft) (8.86°S, 60.9°W) Circular, terraced, central mountain.

LA PÉROUSE - Jean François de Galaup (1741 - 1788) French navy officer and explorer who vanished in the Pacific Ocean. 

Crater. (80.4km /50Mi ø ) (10.64°S, 76.24°E ) Terraced with a central mountain.

LOHSE - Oswald Lohse (1845 - 1915) German astronomer. Investigated mars and Jupiter, drew a map of Mars, worked on the spectroscopy of stars.

Crater. (42km /26Mi ø ) (Dept: 2.250m /7,382ft) (13.7°S, 60.2°E) Interior  rough, with a notable central peak.

 

Haldane

38.0km

Dept: 0,820m

 1.69° S,   84.07° E

Houtermans

31.0km

Dept: 0,650m

 9.40° S,   87.20° E
Kiess 69.0km Dept: 0,800m 6.45° S,   84.13° E
Kreiken 27.4km Dept: 9.09° S,   84.60° E
Runge 38.0km Dept: 0.230m 2.54° S,   86.78° E
Widmannstätten 52.9km Dept: 0.720m 6.11° S,   85.44° E

 

 

 

 

   

 

 

 

 

49.

  

 

MACLAURIN - Collin Maclaurin (1686 - 1746) Scottish astronomer. Mathematician, Physicist-philosopher.  

Crater. (54km /34Mi ø ) (Dept: 3,380m/11.089ft) (1.89°S, 67.95°E) Surrounded by satellite craters, floor resurfaced, tiny central mountain.

MARE SMYTHII - Mare Smythii is named for the 19th century British astronomer William Henry Smyth.

Mare. (373Km /231Mi ø ) (1.71°N, 87.05°E)  The Mare, is in the centre of a basin by the same name, and is the location of a Mascon.

WEBB - Thomas William Webb (1807 - 1885) English clergyman and astronomer. Author of astronomical observing guide "Celestial Objects for Common Telescopes".

Crater. (21km/13Mi ø ) (Dept: 1.850m/6.070ft) (0.98°S, 59.99°E) Circular with a small central hill, a ray system starts at the crater.

 

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