Lat: 45.2°N, Long: 72.9°E, Diam: 65 km, Depth: 4.42 km, Rükl: 16
- Depth data from Kurt Fisher database
- Westfall, 2000: 4.42 km
- Cherrington, 1969: 2.59 km
- Central peak height
- Sekiguchi, 1972: 0.16 km "The central peak having a pit, whose diameter is 3 km, on its northern slope. - fatastronomer
- Zeno of Citium (Greek: 333 BC - 264 BC) was a Hellenistic Stoic philosopher from Citium, Cyprus.
- According to Wilkins's and Moore's book THE MOON there should be a crater to the southeast of Zeno, called Hallowes, but the I.A.U. did not accept that name.
- Hallowes was an English selenographer.
- Strange to say, the name Zeno was also included on a map of Montes Riphaeus, made by J.N.Krieger (see the book MAPPING AND NAMING THE MOON by E.A.Whitaker, page 164, figure 104-a). According to J.N.Krieger, Zeno was a small crater (Euclides M) at the southern part of Montes Riphaeus (Krieger's "Riphaeus Major"). Detection of the name "Zeno" on Krieger's map: Danny Caes.
- A curious "clair-obscur" effect related to the location of the evening terminator at or near Zeno, was photographed by the dedicated lunar observer Stefan Lammel. He calls this phenomenon the Zeno steps.
- "Hallowes": THE MOON by H.P.Wilkins and P.Moore.
- J.N.Krieger's "Zeno" at Montes Riphaeus: MAPPING AND NAMING THE MOON by E.A.Whitaker, page 164, figure 104-a.