T Crucis is a star in the constellation

Crux Crux () is a constellation of the southern sky that is centred on four bright stars in a cross-shaped asterism commonly known as the Southern Cross. It lies on the southern end of the Milky Way's visible band. The name ''Crux'' is Latin for ...

. A

Cepheid variable A Cepheid variable () is a type of star that pulsates radially, varying in both diameter and temperature and producing changes in brightness with a well-defined stable period and amplitude. A strong direct relationship between a Cepheid vari ...

, its

apparent magnitude Apparent magnitude () is a measure of the brightness of a star or other astronomical object observed from Earth. An object's apparent magnitude depends on its intrinsic luminosity, its distance from Earth, and any extinction of the object's ...

ranges from 6.32 to 6.83 over 6.73331 days. It is a yellow-white supergiant that pulsates between spectral types F6Ib and G2Ib. The radius is 55 times that of the Sun.

References

Crux (constellation) Classical Cepheid variables Crucis, T Durchmusterung objects 107447 F-type supergiants 060529 G-type supergiants {{Var-star-stub