Hyginus (crater)

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Hyginus
Hyginus crater 4097 h1.jpg
Coordinates 7°48′N 6°18′E / 7.8°N 6.3°E / 7.8; 6.3Coordinates: 7°48′N 6°18′E / 7.8°N 6.3°E / 7.8; 6.3
Diameter 11 km
Depth 0.8 km
Colongitude 354° at sunrise
Eponym C. Julius Hyginus
LRO image of Hyginus (lower right) and part of Rima Hyginus
Oblique view from Apollo 10

Hyginus is a small lunar caldera located at the east end of the Sinus Medii. Its rim is split by a long, linear rille Rima Hyginus that branches to the northwest and to the east-southeast for a total length of 220 kilometers. The crater is deeper than the rille, and lies at the bend where they intersect. Together the crater Hyginus and Rima Hyginus form a distinctive and prominent feature in an otherwise flat surface. Smaller craterlets can also be discerned along the length of this rille, possibly caused by a collapse of an underlying structure.

Hyginus is one of the few craters on the Moon that was not created as a result of an impact, and is instead believed to be volcanic in origin. It lacks the raised outer rim that is typical with impact craters.

Hyginus was also considered a possible landing site during the Apollo Program, because it was thought to possibly be a site of active volcanism.[1]

Satellite craters[edit]

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

Hyginus Latitude Longitude Diameter
A 6.3° N 5.7° E 8 km
B 7.6° N 5.1° E 6 km
C 7.7° N 8.3° E 5 km
D 11.4° N 4.3° E 5 km
E 8.7° N 8.5° E 4 km
F 8.0° N 8.6° E 4 km
G 11.0° N 6.0° E 4 km
H 6.0° N 7.0° E 4 km
N 10.5° N 7.4° E 11 km
S 6.4° N 8.0° E 29 km
W 9.7° N 7.7° E 22 km
Z 8.0° N 9.5° E 28 km

References[edit]

  1. ^ To a Rocky Moon: A Geologist's History of Lunar Exploration. Don E. Wilhelms, University of Arizona Press (1993), Chapter 10. ISBN 978-0816510658