Grazer was a planet.

In the 23rd century, Ash Tyler's mother intended to visit the moons of Grazer for her first vacation in twelve years. However, on the way she was killed by a rogue comet. (DIS: "Lethe")

Grazer was depicted in Star Trek: Star Charts ("United Federation of Planets I", "United Federation of Planets III") and the Stellar Cartography: The Starfleet Reference Library ("Federation Historical Highlights, 2161-2385") before it was mentioned on screen. It was likely intended to be the homeworld of the Grazerites (including Federation President Jaresh-Inyo) and a Federation member. According to those works, the planet was located in the Grazer system, an Alpha Quadrant quaternary system with stars of classes F, M, K, and G.
According to, Grazer was an "apparently Class M" planet.

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