memory alpha

Megrez, also known as Delta Ursae Majoris or 69 Ursae Majoris, was a star system in the Alpha Quadrant.

Components

Stellar system

This was a trinary system. The primary Megrez was an A-type dwarf. This star had two small, faint companions. (ENT: "Cold Front")

History

In 2256, just before the Battle of the Binary Stars, this system was displayed on a computer display monitoring the warp signatures of incoming Klingon starships aboard the USS Shenzhou. (DIS: "The Vulcan Hello", "Battle at the Binary Stars")

The display showed part of the Big Dipper segment of Ursa Major.

When the Venari Ral laid Omega-47 mines around the core of Federation space in 3196, this system was within the blast radius of one of the mines. (SA: "300th Night")

Stellar cartography

The Megrez system was visible from Earth in the constellation Ursa Major. It was one of the dimmest stars in its constellation and was approximately 81 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)

This star system was only mentioned in writing.
Information on this system was derived from 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