I have just been reading Peter Grego's The Moon and How to Observe It, and I thought some of you might be interested in his list of lunar record-breakers:

• Largest circular mare: Mare Imbrium
• Largest bay: Sinus Iridum
• Largest crater: Bailly (303 km)
• Highest central peak: in Alpetragius (2,910 metres)
• Largest valley: Vallis Rheita (500 km long; 50 km wide)
• Largest graben valley: Vallis Alpes (180 km long; 18 km wide)
• Largest sinuous rille: Vallis Schröteri (160 km long; 10 km wide)
• Largest volcanic dome: Mons Rümker (70 km wide)
• Largest field of domes: Marius hills
• Largest normal fault: Rupes Altai (480 km long)
• Neatest normal fault: Rupes Recta (110 km long)
• Highest mountain: Mons Huygens (5,400 metres)
• Deepest crater: Newton (8,839 metres)
• Largest dorsum (wrinkle ridge): Dorsa Lister (300 km long)
• Smallest dorsum: Dorsum Niggli (50 km long)
• Longest rille: Rima Sirsalis (400 km)
• Most lava-filled crater: Wargentin (84 km)
• Crater with most prominent rays: Tycho (rays up to 1,300 km long)
• Brightest area: Cassini's Bright Spot (Deslandres HA)
• Darkest area: Billy crater
• Blandest area: junction of Sinus Roris and Oceanus Procellarum
• Most TLP-prone area: Aristarchus
• Most noticeably coloured area: Wood's Spot near Aristarchus (orange)
• Most frequently observed crater: Gassendi (How does he know?)
• Smallest lake: Lacus Perseverantiae (70 km)

I find it particularly intriguing that Newton is deeper than Huygens is tall!

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Largest impact basin: South Pole-Aitken Basin (???? km, second only to Hellas Basin on Mars)

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Science is a way of trying not to fool yourself. The first principle is that you must not fool yourself, and you are the easiest person to fool.
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2500 km in diameter. Created about 4.2 billion years ago (during the Pre-Nectarian Era) by an asteroidal impact.

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Excellent collection here. What is a "normal" fault? Rupes Altai sure is long!

Grego:

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Thanks for the tips... sounds like one of books I need to pick up and read.

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My initials are on the moon, my name is on Mars and Earth is my planet of origin.

As far as I know, Hellas Basin is actually smaller (at 2000 km) than Aitken (like Eroica, I read of 2500 km).

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You're correct. Hellas Basin is larger if you count the debris field which reaches as far as 3000 km from the center.

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Science is a way of trying not to fool yourself. The first principle is that you must not fool yourself, and you are the easiest person to fool.
-- Richard Feynman

Cool list

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