IAU descriptor term
Undae in the Solar System
Unda is the term planetary geologists use for a dune field. 14 named features carry it, across 3 of the 14 mapped worlds, the largest being Olympia Undae on Mars at 1,508 km.
Where they are
The largest undae anywhere
Ranked across every mapped world, by catalogued diameter.
1Olympia UndaeMars1,508 km2Ahmakiq UndaeTitan812 km3Notus UndaeTitan530 km4Aura UndaeTitan490 km5Hyperboreae UndaeMars464 km6Abalos UndaeMars443 km7Boreas UndaeTitan260 km8Siton UndaeMars223 km9Eurus UndaeTitan220 km10Aspledon UndaeMars215 km11Al Uzza UndaeVenus150 km12Zephyrus UndaeTitan130 km13Menat UndaeVenus100 km14Ogygis UndaeMars87.7 km
What they are named after
Naming themes are set per world, so one descriptor can draw on very different sources depending on where it sits. Across all 14 undae, 5 categories appear.
Greek8Arabian2Roman2Scandinavian1Mayan1