Horai Fossa (Ryugu)
Data as of 2026-10-23
What it is
- Type
- Fossa, fossae
- IAU definition
Long, narrow depression
- Diameter
- 0.3 km, 67 % of the radius of its body
- Centre
- 32.1° N, 296.6° east (planetocentric latitude, east longitude from 0 to 360°, the IAU convention)
- Name adopted
- December 19, 2018
- Origin of the name
Mythical Mount Horai (Penglai in Chinese), paradise of the immortals; in some versions of the Japanese fairy tale about fisherman Urashima is located in the sea on the shell of tortoise that princess Otohime has turned into.
Quoted in English, as the IAU publishes it.
In Galaxy
Opens its body in the application, the camera turned towards Horai Fossa.
Missions to its body
No observation record of this formation is crossed here. These are the missions the Planetary Data System declares for its body; none is claimed to have observed Horai Fossa.
Sources
International Astronomical Union Working Group for Planetary System Nomenclature, Gazetteer of Planetary Nomenclature, read on October 23, 2026. Feature page: https://planetarynames.wr.usgs.gov/Feature/15797
Type definitions: IAU Descriptor Terms, read on October 17, 2026. https://planetarynames.wr.usgs.gov/DescriptorTerms