of stars in the Calendarium of Al Achsasi Al Mouakket, this star was designated Thalath al Adzari (تالت ألعذاري - taalit al-aðārii), which was translated into Latin as Tertia Virginum, meaning the third virgin. This star, along with ε Canis Majoris (Adhara), η Canis Majoris (Aludra) and ο2 Canis Majoris (Thanih al Adzari), were Al ʽAdhārā (ألعذاري), the Virgins. Physical properties Delta Canis Majoris is a supergiant of class F8 with a radius around 215 times that of the Sun. Its surface temperature is around 5,818 K, and it is 17 times more massive than the Sun. Its absolute magnitude is −6.87, and it lies around 1,600 light-years away. It is rotating at a speed of around 28 km/s, and hence may take a year to rotate fully. Only around 10 million years old, Delta Canis Majoris has stopped fusing hydrogen in its core. Its outer envelope is beginning to expand and cool, and in the next 100,000 years it will become a red supergiant as its core fuses heavier and heavier elements. Once it has an iron core, it will collapse and explode as a supernova. If Delta Canis Majoris were as close to Earth as Sirius is, it would be as bright as a half-full moon. Modern legacy Delta Canis Majoris appears on the flag of Brazil, symbolising the state of Roraima. References F-type supergiants Canis Major Canis Majoris, Delta Durchmusterung objects Canis Majoris, 25 054605 034444 2693 TIC objects Wezen