Sirius IV was the fourth planet in the Sirius star system. In the early 22nd century, the planet belonged to United Earth and was the site of the Cochrane Research Facility. (ENT novel: What Price Honor?)


When Malcolm Reed was an Earth Starfleet cadet, he participated in a tour of cadets to visit the Cochrane Research Facility. When the facility's reactor exploded, twenty Humans died slowly from radiation poisoning, including Cadet John Mayhill. (ENT novel: What Price Honor?)



Alpha Trianguli sector block
Alpha Trianguli
Algira sector Alpha Majoris (Alpha Majoris I) • Sirius system (Sirius A, Shahr: Alpha IAlpha IIAlpha IIISirius IVAlpha VSpringboard) • Lilsis
Almatha sector Almatha system • Aria systemCaralun system • Corwin systemSantos systemTrivas system
Dorvan sector Aokii system • Dorvan system (Dorvan V) • Andoss system • Minas Korva system • Obrom system

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