Trumpler 27 is a possible open cluster in the southern constellation Scorpius.

[5] It was originally thought to be young open cluster in the outer edge of the Sagittarius Arm, still surrounded by interstellar matter.

[5] The light from the stars is heavily extinguished and reddened by intervening interstellar dust.

[4] The light coming from the stars is also significantly polarized.

[2] Several member stars have been studied in closer detail.