What does this number measure?
This orange giant in Boötes is noticeably larger than Pollux. Its representative diameter corresponds to about twenty-five solar diameters. It still depends on the radius measurement; the illustration shows an interpreted surface, without claiming to be a resolved photograph.
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
Proposed catalogue value, an order of magnitude not audited online in this session; an HTTPS source is provided for checking.
Interpretive illustration of Arcturus, an orange giant; its colour and convective structures are plausible interpretations, without a resolved photograph or an actual surface map.