Rigel V
Rigel V is the planet native to the race that refers to itself as Rigelian.
The Rigelians were a humanoid species who inhabit the planet Rigel V. (TOS: "Journey to Babel")
Physiology
Rigelians are believed to have four or five genders, according to information obtained by Doctor Phlox. (ENT: "Cogenitor")
They are known to share a similar internal physiology with Vulcans and Romulans. These similarities, notably to Vulcans, include similar blood chemistries. Rigelians also shared a similar neurology to Vulcans and Romulans, as they too suffered from the neurological disease known as Tuvan Syndrome. (TOS: "Journey to Babel"; DS9: "Inter Arma Enim Silent Leges")
History and politics
Relationships with other species
During the 22nd century, Rigelians maintained relationships with several Alpha and Beta Quadrant species. By the 2150s, it was not uncommon to find a Rigelian visiting Earth.
In 2154, an Andorian and two Rigelians were attacked on Earth in a wake of xenophobia after the Xindi incident. (ENT: "Home")
Later that year, three Rigelians visiting Earth, who were working for the Klingons, attacked and kidnapped Dr. Phlox from the streets of San Francisco. They later transfered him via a Rigelian freighter to a Klingon ship. The Rigelian kidnappers and their ship were later destroyed. (ENT: "Affliction")
In early 2155, the Rigelians participated in talks discussing their wish to join as a possible member in the Coalition of Planets along with Humans, Tellarites, Andorians, Coridans and Vulcans. (ENT: "Demons", "Terra Prime") During the negotiations, six of the Earth universal translators experienced a "glitch" and started confusing the Rigelian language with Andorian. (ENT: "Terra Prime")
Trade and commerce
Rigelian commerce was regulated by Rigelian Trade Commission during the 22nd century. (ENT: "United")
In 2154, a Rigelian scout ship fell victim to an attack by a Romulan drone-ship disguised as the Earth starship Enterprise in order to destabilize the sector. Recognizing the vessel, the Trade Commission contacted Starfleet to demand compensation for the lost of their vessel and the arrest of Jonathan Archer. (ENT: "United")
The Rigelians continued to independently operate their own freighters during the 24th century. In 2369, one of these freighters docked at Deep Space 9 prior to its mission to the Gamma Quadrant. (DS9: "Vortex")
Medical achievements
The Rigelians were responsible for developing a unique gene therapy technique that was capable of curing medical conditions such as Taggart's Syndrome. (ENT: "Demons", "Terra Prime")
During the mid-2260s, an experimental chemical stimulant designed to speed up reproduction and replacement of blood in the bodies of certain species was developed that was successfully tested in Rigelian test subjects on Rigel V. Although the side-effects included tremendous strain on the spleen and the liver, it was later discovered by Doctor Leonard McCoy to be a viable treatment for producing Vulcan T-negative blood. (TOS: "Journey to Babel")
