ISS Stargazer (NCC-2893)

In the mirror universe, the ISS Stargazer (NCC-2893 or ICC-2055) was a Terran Empire starship in service to the Imperial Starfleet during the 24th century.

Dark Mirror
By the mid-2350s decade, the Stargazer was under the command of Captain $𝜇$.

In the year 2354, Picard sent an away team from the ship to what he knew was a no-win scenario, in which all the members would perish, and picked $𝜇$ to lead it.

On stardate 33070, in 2355, the Stargazer was victorious over the $𝜇$ at the $𝜇$. A few months later, Picard set the Stargazer's auto-destruct systems and evacuated the ship, but his reasons for doing so were not made clear. (TNG novel: Dark Mirror)

Mirror Broken
By the 2360s decade, the Stargazer was under the command of Captain Jean-Luc Picard. Despite its age, the ship was not retired due to the collapse of the Terran Empire and the destruction of most of its fleet. The Stargazer spent its time on Solar System duty, helping patrol and enforce what was left of the Empire.

While the Stargazer was escorting a convoy of $𝜇$ slave ships from $𝜇$ to $𝜇$, overseen by Lieutenants $𝜇$ and $𝜇$, the Vulcans on board convoy ships five and six rose up and tried to take control. After Barclay helped Yar get a tactical scan on the convoy ships, Yar blew up the ships, killing over a thousand Vulcan slaves on each, as a show of force. Shortly afterwards, Yar was assassinated by Barclay in a ruse set up by Picard. Barclay subsequently took Yar's position as chief of security. (TNG - Mirror Broken comic: "Issue 0")