What does this number measure?
A red giant visible in the constellation Taurus. Aldebaran appears in the same direction as the Hyades but does not belong to that cluster. This reference compares an estimate of its stellar diameter.
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
Catalogue order of magnitude; a source is provided, but this measurement has not been individually audited.
Aldebaran, an orange giant: interpreted photosphere and convection, approximate diameter.