What does this number measure?
A variable red supergiant observed using interferometry. The depicted disc represents the diameter, twice the adopted radius of 1411 nominal solar radii (1 nominal solar radius = 695 700 km). The value is a dated estimate, not an established size record. Rosseland radius of 1 411 ± 124 solar radii in Arroyo-Torres et al. (2013), for the adopted distance; its molecular layers extend farther.
Compare the stated dimensions
The comparison uses the number in each fact sheet: altitude, height, diameter, length or distance, depending on the reference. Two values in metres do not necessarily describe the same property.
Source and limitations
Rosseland radius of 1 411 ± 124 solar radii in Arroyo-Torres et al. (2013), for the adopted distance; the molecular layers extend farther.
AH Scorpii: artistic illustration of a stellar photosphere. A shared generic pattern for comparing diameters, not a photograph or a reconstruction of this star. The value and its uncertainties come from the fact sheet.