Back Punto de separación de la secuencia principal Spanish Point de sortie de la séquence principale French Punto di turn-off Italian Titik lepas jujukan utama Malay Точка поворота главной последовательности Russian Точка повороту головної послідовності Ukrainian 主序轉折點 Chinese
The turnoff point for a star refers to the point on the Hertzsprung–Russell diagram where it leaves the main sequence after its main fuel is exhausted – the main sequence turnoff.
By plotting the turnoff points of individual stars in a star cluster one can estimate the cluster's age.