List of geological features on Ida and Dactyl explained

This is a list of named geological features on asteroid 243 Ida and its moon, Dactyl.

Ida

Regiones

Idaean regiones (geologically distinct areas) are named after the discoverer of the asteroid, and the places where he worked.

Regio	Coordinates	Diameter (km)	Approval Date	Named After	Ref
Palisa Regio		23	1997
		8	1997	Pola, Croatia
Vienna Regio		13	1997

Dorsa

Dorsum	Coordinates	Diameter (km)	Approval Date	Named After	Ref
		40	1997	Tim E. Townsend, a member of the Galileo probe imaging team

Craters

Idaean craters are named after famous caves.

Crater	Coordinates	Diameter (km)	Approval Date	Named After	Ref
Afon		0.8	1994
Atea		2	1997
Azzurra		9.6	1997	Azzurra Grotto, Italy
Bilemot		1.8	1997
Castellana		5.2	1997	Castellana Cave, Italy
Choukoutien		1.1	1997	Choukoutien, China
Fingal		1.5	1997
Kartchner		0.9	1997	Kartchner Caverns, AZ, United States
Kazumura		2.1	1997	Kazumura Cave, HI, United States
Lascaux		11.8	1997	Lascaux Cave, France
Lechuguilla		1.5	1997	Lechuguilla Cave, NM, United States
Mammoth		10.2	1997	Mammoth Cave, KY, United States
Manjang		1	1997
Orgnac		10.6	1997	Orgnac Cave, France
Padirac		1.9	1997	Padirac Cave, France
Peacock		0.2	1997	Peacock Cave, FL, United States
Postojna		6	1997
Sterkfontein		4.7	1997
Stiffe		1.5	1997	Stiffe Cave, Italy
Undara		8.5	1997	Undara Cave, Australia
Viento		1.6	1997	Viento Cave, Spain

Dactyl

Dactylian craters are named after the mythological Dactyls.

Crater	Coordinates	Diameter (km)	Approval Date	Named After	Ref
Acmon		0.3	1997
Celmis		0.2	1997

External links

• USGS: Ida nomenclature
• USGS: Dactyl nomenclature