Существует также легенда, что якобы в древнем Египте в элитные войска фараона набирали юношей, которые могли различать эти звезды. Это было доказательством, что зрение было достаточно острым. В версиях легенды фигурируют греческие лучники или индейские охотники.
Нет подтверждения реальности этих фактов. Кроме того, Мицар и Алькор легко различимы как отдельные звёзды даже при средней остроте зрения.
Есть гипoтеза, что в новое время Алькор сделался заметнее, чем в древности из-за увеличения углового расстояния от Мицара.
- in the desert regarded it as a test of penetrating vision; and they were accustomed to oppose "Suhel to Suha / Canopus to Alcor" as occupying respectively the highest and lowest posts in the celestial hierarchy.
- "Al Sahja" was the rhythmical form of the usual "Suha"; and it appears as "al Khawwar / the Faint One", in an interesting list of Arabic star-names, published in Popular Astronomy for January, 1895, by Professor Robert H. West, of the Syrian Protestant College at Beirut.
- The 14th century Arabian lexicographer Al Firuzabadi called it "Our Riddle / Al Sadak, the Test", (correctly, "Saidak / True");
- the astronomer Al Biruni (973–1048 A.D.) mentioned its importance in the family life of the Arabs on the 18th day of the Syrian month Adar, the March equinox;
- the 13th century astronomical writer Al Kazwini said that "people tested their eyesight by this star".
- a modern legend of that same people makes Alcor the infant of Mizar - the elder of the three star-sisters, - the daughters of a dead star Al Naash, killed by the Polaris;
- although the statement has been made that Alcor was not known to the Greeks, there is an old story that it was the "Lost Pleiad - Electra", which had wandered here from her companions and became "Alopex / the Fox";
- the Latin title was "Eques Stellula / the Little Starry Horseman";
"Vidit Alcor, at non lunam plenam / he saw Alcor, but not the full moon" came to be a proverbial description of one keenly alive to trifles, but dull of apprehension for broad facts.
- in Germany, "Eques / the Cavalier", is from the 17th century German astronomer Bayer; Humboldt wrote of it as being seen with difficulty.
- in France, Arago similarly alluded to it;
- in England, the "Horse and his Rider", and, popularly, "Jack on the Middle Horse", are well known, Mizar being the horse.
In Japanese mythology, Alcor is known as the lifespan star or "jumyouboshi", as it was believed that one, who could not see this star would pass away by year's end.