Wiki Caprica
Wiki Caprica
Helios Alpha
Helios Alpha
Type Star
Location Cyrannus Star System
Debut "Pilot"
Significance Home of the Colonies of Picon, Caprica, Gemenon and Tauron
Cultural References Helios

Helios Alpha is one of four stars in the Cyrannus Star System. It has a spectral class of G2V and a mass of 1.0. Helios Alpha and Helios Beta form a binary system. They revolve around their common barycenter (center-of-gravity) with an orbital period of three-hundred and seventy-three years.


  • Icarus - This planet in the first orbit has a molten metal surface rendering it uninhabitable.
  • The colony of Picon is the second closest to the star in an inclined orbit.
  • Caprica and Gemenon share the third orbit in the system. They revolve around their common barycenter (center-of-gravity) with an orbital period of 28.2 days.
  • The colony of Tauron is in the fourth orbit of Alpha. Tauron's lone satellite, Minos, is the only ringed moon in the Cyrannus system.
  • The gas giant, Zeus, is in the fifth orbit. It is the largest planet in the Cyrannus system.
  • Persephone is the seventh planet in the sixth and last orbit of the star, an orbit which is inclined and erratic. It is the smallest planet in the Cyrannus Star System.


Archaeological evidence confirms that the first landfall in the Four Systems occurred two-thousand years ago on the planet, Gemenon. However, for most of recorded history, Helios Alpha has taken a backseat to the richer and more populous worlds of Helios Beta. Up until two-hundred years ago, Picon and Tauron were ruled by Virgon and Leonis.

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Mandel, Geoffrey. "The Twelve Colonies of Kobol" map. Technical Advisors Jane Espenson and Kevin R. Grazier, special thanks to Bob Harris, author of "Beyond Caprica: A Visitors Guide to the Twelve Colonies," Quantum Mechanix, 2010.