Helicon (crater)

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
Helicon crater 4134 h2.jpg
Coordinates 40°24′N 23°06′W / 40.4°N 23.1°W / 40.4; -23.1Coordinates: 40°24′N 23°06′W / 40.4°N 23.1°W / 40.4; -23.1
Diameter 25 km
Depth 0.5 km
Colongitude 23° at sunrise
Eponym Helicon
Highly oblique view of Helicon (left) and Le Verrier (right). The mountain on the horizon at left is Promontorium Laplace, about 180 km beyond Helicon. Note that Helicon's ejecta is buried by the mare lava, but Le Verrier's is not. From Apollo 15.
Another oblique view of Helicon (left), at a higher sun angle. Also from Apollo 15.

Helicon is a small lunar impact crater that is located on the north part of the Mare Imbrium. The crater is named after Mount Helicon, a mountain located nearly northwest of Athens, Greece. To the northwest is the prominent Sinus Iridum, a mountain-ringed bay on the mare. Just nearly two crater diameter to the east (about 50 km) is the slightly smaller crater Le Verrier. No other prominent craters are nearby other than Carlini further south and northeast are the recently named tiny craters of Guang Han Gong, Tai Wei, Tai Shi and Zi Wei.

Helicon is a nearly circular formation with inner walls that curve down to a relatively flat floor. There is a tiny craterlet located at the midpoint of the interior, and a small craterlet along the southwestern rim.

Satellite craters[edit]

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

Helicon Latitude Longitude Diameter
B 38.0° N 21.3° W 6 km
C 40.1° N 26.2° W 1 km
E 40.5° N 24.1° W 3 km
G 41.7° N 24.9° W 2 km

External links[edit]

  • Wood, Chuck (2006-08-20). "Out the Porthole". Lunar Photo of the Day. Retrieved 2016-09-18. , excellent earth-based image of Sinus Iridum and vicinity, including Helicon and Le Verrier