Rupes Recta
| Rupes Recta | ||
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| Rupes Recta and the surrounding area | ||
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| position | 21.7 ° S , 7.76 ° W | |
| diameter | 116 km | |
| Named after | Latin for straight cliff (the straight wall). | |
| See also Gazetteer of Planetary Nomenclature | ||
The Rupes Recta or straight furrow - formerly also known as the Long Wall - is a distinctive step on the moon . It demarcates the large, slightly wavy Mare Nubium from the smooth surface of one of its eastern bays and can be clearly seen in small telescopes in the grazing light of the crescent phases through its shadow cast.
If the shadow boundary of the terminator is more than 20-30 degrees away, i. H. two days later, the structure disappears and can only be seen in larger telescopes (from about eight inches). After three days it becomes practically invisible.
The length of the furrow is given in the selenographic literature with 96 to 130 km, its height with about 250 meters and its width with 2-3 km. Contrary to the opinion of earlier lunar explorers , it does not represent a steep slope , but a step with an incline of almost 10 °, which is noticeable due to its very straight shape.
The selenographic coordinates of the furrow center are 21 ° south and 8 ° west.
See also
Web links
- SkyTrip.de: Rupes Recta
- The-moon.wikispaces.com: Rupes Recta (English)
- Spektrum.de : Amateur recordings [1] [2] [3]