Observing the Moon – south-west quadrant

Here is a selection of objects for amateur astronomers to view with a small telescope in the south west quadrant of the Moon. This region comes into view following First Quarter phase, and begins to go back into shadow between Last Quarter and New Moon.

Moon southwest

Mare Humorum has nothing to do with comedy. It is the Sea of Moisture which is worth seeking out to spot the dramatic crater Gassendi perched on its northern edge.

Look to the east of Mare Nubium, the Sea of Clouds, for a fine chain of craters stretching vertically and best seen soon after First Quarter. They are Ptolemaeus, Alphonsus, Arzachel, Purbach, Regiomontanus and Walter.

Further south in this crater-rich region you will find the magnificent Clavius, itself peppered with several other impact sites. The whole area will give telescope users hours of viewing pleasure.

Update! For an alternative, inverted view, here is a chart with south at the top.

Moon southwest inverted

You can download a check sheet for the entire list of 50 features here! (PDF file).

Our list of 50 features

1. Albategnius
2. Alphonsus
3. Alpine Valley
4. Altai scarp
5. Apennines
6. Archimedes
7. Aristarchus
8. Aristillus
9. Aristoteles
10. Arzachel
11. Autolycus
12. Bessel
13. Birt
14. Bullialdus
15. Catharina
16. Clavius
17. Copernicus
18. Cyrillus
19. Endymion
20. Eudoxus
21. Fracastorius
22. Gassendi
23. Grimaldi
24. Herodotus
25. Hevelius
26. Hipparchus
27. Kepler
28. Lamont
29. Langrenus
30. Linné
31. Menelaus
32. Petavius
33. Piccolomini
34. Plato
35. Posidonius
36. Proclus
37. Ptolemaeus
38. Purbach
39. Regiomontanus
40. Riccioli
41. Rümker
42. Schickard
43. Schiller
44. Stöfler
45. Straight Wall
46. Theophilus
47. Tycho
48. Vendelinus
49. Walter
50. Wargentin

Fifty fantastic features

Moon in relief

Our amazing Moon.

Here’s our guide to observing some of the finest sights on the Moon with small telescopes.

North-east quadrant


What to see in the north-east.

Here’s where to find some of the fantastic features visible on the north-east quadrant of the Moon.

South-east quadrant


What to see in the south-east.

Here’s where to find some of the fantastic features visible on the south-east quadrant of the Moon.

North-west quadrant


What to see in the north-west.

Here’s where to find some of the fantastic features visible on the north-west quadrant of the Moon.

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