Theon Senior
Contents
Theon Senior
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Lat: 0.8°S, Long: 15.4°E, Diam: 18 km, Depth: 3.47 km, Rükl: 45 |
LO-IV-090H The 5-km diameter crater at the top is Theon Senior A.
Images
LPOD Photo Gallery Lunar Orbiter Images Apollo Images
Other orbital photographs of Theon Senior
Frame 1112 (made by Lunar Orbiter 1) shows an interesting Hi-Res close-up of Theon Senior (the large crater near the image's bottom).
The last one of the five Apollo 10 photographs in the LPI's list (AS10-32-4767) does not show Theon Senior!
Although not mentioned by the LPI, Apollo 10 made more orbital photographs of Theon Senior, such as: AS10-31-4546, 4547, and 4548.
Apollo 16 made several orbital mapping/metric Fairchild-camera photographs of Theon Senior, one of them is AS16-M-0831 (the pair of Theon Senior and Theon Junior is noticeable between the frame's centre and the curved horizon).
Research Lunar Orbiter 1, Apollo 10, and Apollo 16 photography: Danny Caes
Maps
(LAC zone 78A2) LAC map Geologic map LM map AIC map
Description
Description: Elger
(IAU Directions) THEON SENIOR.--A brilliant little ring-plain, W.N.W. of Delambre, 11 miles in diameter, and of great depth, with a regular and perfectly unbroken wall. North of it is a bright little crater.
Description: Wikipedia
Additional Information
- Depth data from Kurt Fisher database
Arthur, 1974: 3.47 km
Westfall, 2000: 3.47 km
Viscardy, 1985: 3.47 km
Cherrington, 1969: 3.2 km - From the shadows in LO-IV-090H, Theon Junior is 3400 - 3600 m deep. - Jim Mosher
- Satellite crater Theon Senior A is on the ALPO list of bright ray craters.
- Included on the ALPO list of banded craters
- TSI = 5, CPI = 5, FI = 10; MI =20 Smith and Sanchez, 1973
Nomenclature
- Theon of Smyrna (ca. 70–ca. 130 to 140) was a Greek philosopher and mathematician, whose works were strongly influenced by the Pythagorean school of thought. Little is known about the early life of Theon of Smyrna; Ptolemy cites work of his on several occasions between 127 and 132, but there are few other dates that are known for certain.
- Note that "Theon Senior" and "Theon Junior" were not father and son, as they lived in different centuries.
- According to Whitaker (p. 215), Riccioli used the name "Theon sen." to label the modern crater Taylor A. He does not seem to explain how the name got moved to its present position. - Jim Mosher
LPOD Articles
Bibliography
