Hestia
the smallest gas giant
Hestia was a gas giant orbiting the star Helios Delta in the Cyrannus star system. At only 47,000 kilometers in diameter it was the smallest gas giant in the Four Systems, and it held seventeen moons.
Hestia was a gas giant in the Cyrannus star system, orbiting the star Helios Delta. At only about 47,000 kilometers in diameter, it was the smallest gas giant in the Four Systems, yet it held a large family of seventeen moons. (Battlestar Galactica: Map of the Twelve Colonies)
Description#
Hestia orbited Helios Delta, the smallest of the stars in the Cyrannus star system. Despite its standing as the smallest gas giant among the Four Systems, it retained a substantial system of seventeen moons. Two of those moons, Kronos and Rhea, were notable for sharing a single orbit around the planet. None of this is shown on screen; it comes from the official map of the Twelve Colonies published by Syfy and Universal. (Battlestar Galactica: Map of the Twelve Colonies)
The gas giant lay at the heart of one of the more crowded regions of Helios Delta. The colonies of Aerilon and Canceron occupied stable Lagrange points along Hestia's orbital path, Aerilon leading and Canceron trailing, so that two of the Twelve Colonies of Kobol shared the same orbit as the gas giant. Aquaria, an icy world, also circled Helios Delta. (Battlestar Galactica: Map of the Twelve Colonies)
Frequently asked questions
- What was Hestia?
- Hestia was a gas giant in the Cyrannus star system, orbiting the star Helios Delta. At only about 47,000 kilometers in diameter it was the smallest gas giant in the Four Systems.
- How many moons did Hestia have?
- Hestia had seventeen moons. Two of them, Kronos and Rhea, shared a single orbit around the planet.
- What worlds shared Hestia's orbit?
- The colonies of Aerilon and Canceron shared Hestia's orbit around Helios Delta, sitting at its Lagrange points, with Aerilon at the leading point and Canceron trailing.
Sources
- WebBattlestar Galactica: Map of the Twelve Colonies, Official star map of the Cyrannus system, Syfy and Universal (2010)
Spotted a factual error or a primary source we missed? Email a correction. Every flagged claim gets reviewed.
Followed from this entry

Cyrannus: the Colonies' four suns
Four stars in a double binary, Helios Alpha through Delta, holding all Twelve Colonies. Refugees from Kobol settled them two thousand years back.

Twelve Colonies of Kobol
The United Colonies of Kobol, also called the Twelve Colonies of Kobol, was the interplanetary state that represented humanity from the Cylon War until its dissolution upon the settling of the second Earth.

Aerilon
Aerilon was an agricultural world and one of the Twelve Colonies of Kobol. Known as the food basket of the Colonies, it was a poor, working-class farming world and the birthplace of Gaius Baltar.

Aquaria
Aquaria was a cold, sparsely populated ocean world and one of the Twelve Colonies of Kobol. Official guides describe it as a former research outpost that grew into a frontier colony governed by direct democracy.

Canceron
Canceron was a planet of the Cyrannus star system orbiting Helios Delta, the most populous of the Twelve Colonies of Kobol. A long-standing democracy of vast cities and sprawling slums, it shared an orbit with Aerilon and Hestia.
Mentioned in2 entries
Canceron
Canceron was a planet of the Cyrannus star system orbiting Helios Delta, the most populous of the Twelve Colonies of Kobol. A long-standing democracy of vast cities and sprawling slums, it shared an orbit with Aerilon and Hestia.
Ophion: the captured gas giant of Helios Gamma
Ophion was a large, frigid gas giant orbiting the star Helios Gamma in the Cyrannus Star System. Studies suggested it was a rogue planet captured by the system, an event that also shifted Ragnar into its present orbit.
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