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Pre-Nectarian basins arranged by group number (1=oldest, 9=youngest). Basins that are in parentheses have not been definitively confirmed. Numbers following the basin name are estimates of its main rim diameter
Group 1 Group 2 Group 3 Group 4 Group 5 Group 6 Group 7 Group 8 Group 9
South Pole-Aitken 2500 (Al-Khwarizmi/King) 590 Lomonosov-Fleming 520 Keeler-Heaviside 780 Smythii 840 Lorentz 360 Birkhoff 330 Freundlich-Sharonov 600 Apollo 505
(Pingré-Hausen) 300 Nubium 690 Poincare 340 Coulomb-Sarton 530 Planck 325 Grimaldi 430
(Werner-Airy) 500 (Mutus-Vlacq) 700 Ingenii 650 Schiller-Zucchius 325
(Balmer-Kapteyn) 550 Tranquillitatis 800 (Amundsen-Ganswindt) 355
(Flamsteed-Billy) 570 Australe 880
(Marginis) 580 Fecunditatis 990
(Insularum) 600
(Grissom-White) 600
Tsiolkovskiy-Stark) 700


Pre-Nectarian basins
Group Name Diameter
(km)
9 Apollo 505
Grimald 430
8 Freundlich-Sharonov 600
7 Birkhoff 330
Planck 325
Schiller-Zucchius 325
(Amundsen-Ganswindt) 355
6 Lorentz 360
5 Smythii 840
Coulomb-Sarton 530
4 Keeler-Heaviside 780
Poincare 340
Ingenii 650
3 Lomonosov-Fleming 520
Nubium 690
(Mutus-Vlacq) 700
Tranquillitatis 800
Australe 880
Fecunditatis 990
2 (Al-Khwarizmi/King) 590
(Pingré-Hausen) 300
(Werner-Airy) 500
(Balmer-Kapteyn) 550
(Flamsteed-Billy) 570
(Marginis) 580
(Insularum) 600
(Grissom-White) 600
Tsiolkovskiy-Stark) 700
1 South Pole-Aitken 2500