Castor (star) in their spectra, and all are flare stars. "α Geminorum" (Latinised to "Alpha Geminorum") is the star system's Bayer designation. Castor and Pollux are the two "heavenly twin" stars that give the constellation Gemini (meaning "twins" in Latin) its name. The name "Castor" refers specifically to Castor, one of the twin sons of Zeus and Leda in Greek and Roman mythology. The star was annotated by the Arabic description "Al-Ras al-Taum al-Muqadim", which translates as "the head of the foremost twin." In the catalogue of stars in the "Calendarium of Al Achsasi Al Mouakket", this star was designated "Aoul al
HMS Leda (1892) to coast-guard duties. on 8 February 1908, "Leda" collided with the old cruiser in Harwich harbour. "Leda" was badly holed and had to be beached to avoid sinking. She went under repair at Sheerness Dockyard. Repairs were completed by the end of March that year, allowing"Leda" to resume her coast-guard duties at Harwich. She was converted to a minesweeper in 1909, which involved removing the torpedo tubes, but continued on coast-guard and fishery protection operations. On 3 February 1914 "Leda" was towing the coastguard cutter "Snipe" off Gunfleet in the Thames estuary when "Snipe" foundered and sunk. One of "Leda"s