Theon Junior (crater)
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| Crater characteristics | |
| Coordinates | 2.3° S, 15.8° E |
|---|---|
| Diameter | 17 km |
| Depth | 3,580 m |
| Colongitude | 344° at sunrise |
| Eponym | Theon of Alexandria |
Theon Junior is a lunar impact crater that is located just to the west-southwest of Delambre crater. It forms a matching pair with Theon Senior crater, only a couple of crater diameters to the north-northwest. The crater is circular and bowl-shaped, with a small floor at the bottom of the high, sloping interior walls. It is named for Theon of Alexandria, a 4th century Greek astronomer and mathematician. The crater is from the Eratosthenian period, which lasted from 3.2 to 1.1 billion years ago. It is 17 kilometers in diameter and the difference in height at its rim and its deepest part is 3,580 meters.[1][2]
[edit] Satellite craters
By convention these features are identified on Lunar maps by placing the letter on the side of the crater mid-point that is closest to Theon Junior crater.[3]
| Theon Junior |
Latitude | Longitude | Diameter |
|---|---|---|---|
| B | 2.1° S | 13.3° E | 8 km |
| C | 2.3° S | 14.7° E | 4 km |
[edit] References
- ^ Autostar Suite Astronomer Edition. CD-ROM. Meade, April 2006.
- ^ Moore, Patrick (2001). On the Moon. Sterling Publishing Co.. ISBN 0-304-35469-4.
- ^ Bussey, B.; Spudis, P., (2004). The Clementine Atlas of the Moon. New York: Cambridge University Press. ISBN 0-521-81528-2.
