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Sigma Coronae Borealis, also known as 17 Coronae Borealis, was a star system in the Alpha Quadrant. (ENT: "Cold Front")

Components

This was a quintenary system. This system was organized into a pair of binary systems and a single star system.

Found in the binary system Sigma2 Coronae Borealis, there was the primary Sigma Coronae Borealis Aa, a F-type dwarf, and its' companion Sigma Coronae Borealis Ab.

In the Sigma1 Coronae Borealis system, there was the star Sigma Coronae Borealis B. It was a G-type dwarf.

And, finally, the binary system Sigma Coronae Borealis C consisted of the red dwarf Sigma Coronae Borealis Ca and its' companion Sigma Coronae Borealis Cb.

Stellar Cartography

The Sigma Coronae Borealis system was visible from Earth in the constellation Corona Borealis. It was approximately 76 light years from Sol.

In the 2150s, this system's position was labeled on an United Earth star chart which was displayed in several crew and guest quarters aboard the Enterprise. (Star Trek: Enterprise, set decoration)

In 3191, this system's location was labeled on a star chart. (DIS: "Red Directive")

In 3195, this system's position was labeled on a Federation star chart which was displayed in Starfleet Academy's Stellar Cartography laboratory. (SA: "Beta Test")

Later that year, this system's position was labeled on a Federation star chart which was displayed on the bridge of the USS Athena. (SA: "Come, Let's Away")

In 3196, during the Omega-47 crisis, the location of Sigma Coronae Borealis was depicted on star charts and readouts used across several locations on the USS Athena to locate, monitor, and respond to the Omega-47 mines laid by the Venari Ral. This system was outside the affected region. (SA: "300th Night", "Rubincon")

This star system was only mentioned in writing.
Information on this system was derived from the episodes and films, the reference works Star Trek: Star Charts and Stellar Cartography: The Starfleet Reference Library, and real-world sources. The reference works were used extensively in the creation of star charts seen in Star Trek: Discovery, Star Trek: Picard, Star Trek: Strange New Worlds, Star Trek: Prodigy, Star Trek: Lower Decks, and Star Trek: Starfleet Academy. The real-world information added to the article was current as of 2026.
The star chart seen in the series Star Trek: Enterprise made its first appearance in Crewman Daniels quarters in "Cold Front". It was also seen in several other episodes of the series, from 2151 to 2154. (For more information, see Federation star charts#United Earth Alpha/Beta star chart)

External links