MOONWATCH

September's top lunar feature to observe

Deslandres Type: Walled plain Size: 235km Longitude/latitude: 5.6° W, 32.5° S Age: Older than 3.9 billion years Best time to see: First quarter (11–12 September) or six days after full Moon (24–26 September) Minimum equipment: 10× binoculars Deslandres is a large, ancient and time-worn feature located just to the southeast of 750km Mare Nubium (the Sea of Clouds). A day after the first quarter Moon, there are two extremes visible in this region: the young, bright 86km crater Tycho and the dark, lava-filled 98km crater Pitatus on the southern edge of Mare Nubium. Centre to centre, Pitatus lies 410km north of Tycho. Head three-quarters of the way along this connecting line starting from Tycho, then head east for 200km and you'll be at the centre of Deslandres. Unlike either Tycho…

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BBC Sky at Night United Kingdom (Digital) - 1 Issue, September 2024

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