The Upper Arm (al-‘adud)
The Upper Arm is part of the Henna-Dyed Hand (al-kaf al-khadib) of Thuraya, a brilliant star cluster that was anthropomorphized as a female figure. One of two Hands, the Henna-Dyed Hand is longer than the Amputated Hand (al-kaf al-jadhma’) and features several well-defined elements.
An elongated group of stars located between the Elbow and Thuraya.
δ PER, blue-white star, magnitude 3.01
ν PER, yellow star, magnitude 3.77
ε PER, blue-white star, magnitude 2.89
The stars of the Upper Arm set together about the time that the Brand (al-haq’a) sets, but they rise separately over the course of 2 weeks. Ibn Qutayba (d. 879 CE) reported that the Brand was said to set on the morning of December 9. On account of the precession of the equinoxes, today we can expect to observe the Upper Arm setting in early January and rising throughout the month of May, as seen from the latitude of Tucson. (See How to Observe on the About page for more on this topic.)
The Upper Arm does not figure among the rain stars.
The Upper Arm is not one of the lunar stations.
Related Stars and Celestial Complexes
The Upper Arm is part of the Hands of Thuraya (aydi ath-thuraya, أيدي الثريا) folkloric celestial complex. The Upper Arm connects the Henna-Dyed Hand (al-kaf al-khadib, الكف الخضيب) to Thuraya itself (ath-thuraya, الثريا).