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Type: Planet
Native Species: Denobulan
Denobulan lemur
Location: Denobula Triaxa system
Alpha Quadrant
Affiliation: Coalition of Planets

Denobula was an inhabited planet in the Denobula Triaxa system. It was the homeworld of the Denobulans, a warp-capable humanoid species, as well as of the Denobulan lemur.


Genetic engineering was used on Denobula since the mid-20th century, according to Phlox to "generally positive effect." (ENT: "Borderland")

The first Human to serve on Denobula was Doctor Jeremy Lucas, who was stationed there circa September 2151. (ENT: "Dear Doctor")

As of 2152, Denobula was heavily populated, with approximately twelve billion inhabitants, all living on the planet's only continent. The cities were quite crowded, though Phlox noted that the atmosphere was "vibrant, communal". The riverside nightclubs of the Kaybin District were known as meeting places to find intimate partners during the Denobulan mating season. (ENT: "Dear Doctor", "Doctor's Orders", "The Catwalk")

In 2152, Phlox requested information on Pa'nar Syndrome from the Vulcan doctor Yuris, claiming it was on behalf of a colleague on Denobula studying thymic sclerosis. (ENT: "Stigma")

In 2153, a group of Denobulan scientists studied a system of caves on the planet Xantoras, seeking to avert seismic disasters on Denobula. (ENT: "The Breach")

In 2155, a representative from Denobula participated in talks at Starfleet Headquarters on Earth to form a Coalition of Planets. (ENT: "Demons", "Terra Prime")

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Background information Edit

Denobula was mentioned in voiceover dialogue that was scripted for ENT: "Dear Doctor" but not included in the final version of that episode; at one point, Phlox said that miners who had been assigned, along with him, to a Denobulan mining facility on Pree'nos had tried to make their compound as much like Denobula as they could (such as with "entertainment from home"), though that hadn't seemed right to him. The planet was likewise referred to once in the final draft script of ENT: "Detained" but not in the final edit of that installment.

Phlox actor John Billingsley imagined the Denobulan homeworld as a utopia, to the point of causing the Denobulans to become insular. "I mean, maybe it's so Eden-like [on Denobula]," he reckoned, "that it's like, 'Oh, what do I want to go out there for? I've got everything that I want right here.'" (Star Trek Monthly issue 95,  p. 43)

Shortly before Star Trek: Enterprise was cancelled at the end of its fourth season, John Billingsley expressed an interest in viewing Denobula on the series, saying, "I would love to see a visit to Denobula." [1] In fact, Manny Coto once stated that, if the series had gone into a fifth season, Enterprise would indeed have visited the planet. [2]

According to, Denobula was an M-class planet and was the sole planet in its system. [3]

According to the Star Trek: Star Charts (pp. 36, 44, "United Federation of Planets"), the Denobula Triaxa system, also known by its Bayer designation as Iota Boötis, was located in or near Federation space, in the Alpha Quadrant. Denobula Triaxa A was a G class star with a magnitude of +7, which was 1/10 the brightness of Sol. Denobula Triaxa B and C were G class stars. In the mid-22nd century, Denobula was a destination on the Earth-Denobula, Fellebia-Denobula, Neethia-Denobula, Pyrithia-Denobula, Pree'-Denobula, and Vulcan-Denobula runs. In 2378, Denobula was a Federation member.

According to the reference book Star Trek: Federation - The First 150 Years, a Romulan force attacked Denobula and its orbiting spaceport in 2158. The ambush resulted in over three million casualties and intimidated Denobula, causing it to refrain from supporting the Coalition of Planets during the Earth-Romulan War.


The Star Trek: Vanguard novel Precipice mentions the national reserve bank in Denobula's capital city being broken into in the mid-23rd century.

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