Fossae on Mars
61 named features carry the IAU descriptor Fossa — a long, narrow depression on Mars, out of 117 in the mapped Solar System.
Named
61
of 2,049 named places on Mars — 3.0%
Largest
2,731 km
Sirenum Fossae
Median size
430 km
Across the 61 with a measured diameter
Named between
1973–2021
IAU approval dates
How fossae on Mars get their names
The IAU assigns each feature class on each world a naming theme. Across the 60 fossae with a recorded origin, 6 categories appear, led by Greek.
Greek32Latin22Egypt2China2Sanskrit1Roman1
All 61 fossae on Mars
Every one has its own page, on the surface it sits on.
Sirenum Fossae2,731 kmTantalus Fossae2,362 kmTempe Fossae2,116 kmIcaria Fossae2,115 kmAlba Fossae2,072 kmClaritas Fossae2,031 kmMareotis Fossae1,908 kmMemnonia Fossae1,585 kmLabeatis Fossae1,496 kmCerberus Fossae1,235 kmCeraunius Fossae1,167 kmElysium Fossae1,044 kmThaumasia Fossae996 kmSacra Fossae950 kmCyane Fossae913 kmAmenthes Fossae850 kmUlysses Fossae850 kmTithoniae Fossae838 kmCoracis Fossae749 kmNili Fossae728 kmNoctis Fossae713 kmAcheron Fossae703 kmMangala Fossa695 kmHephaestus Fossae633 kmNectaris Fossae623 kmSinai Fossae589 kmColoe Fossae576 kmMelas Fossae568 kmGalaxias Fossae552 kmAganippe Fossa537 kmPyrrhae Fossae430 kmEchus Fossae421 kmOlympica Fossae420 kmTractus Fossae403 kmUranius Fossae394 kmStygis Fossae385 kmNia Fossae380 kmHyblaeus Fossae375 kmOti Fossae374 kmGordii Fossae369 kmCalydon Fossa351 kmJovis Fossae349 kmFortuna Fossae324 kmZephyrus Fossae306 kmTyrrhena Fossae306 kmPyramus Fossae298 kmIsmeniae Fossae287 kmMedusae Fossae279 kmNilokeras Fossa267 kmIdaeus Fossae202 kmGigas Fossae190 kmTanais Fossae173 kmOceanidum Fossa167 kmPavonis Fossae156 kmErythraea Fossa155 kmAlbor Fossae155 kmHalex Fossae147 kmAtrax Fossa34.4 kmChalce Fossa34 kmYaodian Fossae15 kmQidu Fossae12 km
Fossae elsewhere in the Solar System
The same descriptor is used on 8 other worlds, for 56 more features.