Trumpler 27-1 was discovered and catalogued when the open cluster (not confirmed then) was first identified in the late 20th century.

[citation needed] It has since remained largely unobserved, being featured in the Gaia Catalogue and other pieces of literature.

[5] Trumpler 27-1 is among the largest stars known, with a radius of over 1,360 solar radii.

[3] This star's spectral type is M0Ia,[6] meaning it possesses a cool temperature of below 3,800 K. So far, Trumpler 27-1 is the only identified red supergiant in the open cluster Trumpler 27.

[citation needed] Trumpler 27–1, and the open cluster in which it is located, is in the constellation of Scorpius.