About this star:

A yellow star at the nostrils of the Snake charmer Ophiuchus. Cebalrai, Celbalrai, and Cheleb are from Kalb al Ra'i.or Kalb ar-Ra'i, "The shepherd's dog". The meaning "The Heart of the Shepherd," often given for Celabrai, is erroneous, doubtless from confusion of the Arabic Kalb, Heart, and Kalb, Dog. The early Arabs saw in this area a shepherd and his flock with a dog as Ras Algethi. (Allen).

Influence of the constellation:

It is said to give a passionate, blindly good-hearted, wasteful and easily seduced nature, together with little happiness, unseen dangers, enmity, strife and slander. Pliny said that it occasioned much mortality by poisoning. This constellation has also been called Aesculapius and held to rule medicines. By the Kabalists it is associated with the Hebrew letter Oin and the 16th Tarot Trump "The Lightning Struck Tower". (Robson).

Rising:

When Ophiuchus, encircled by the serpent's great coils, rises he renders the forms of snakes innocuous to those born under him. They will receive snakes into the folds of their flowing robes, and will exchange kisses with these poisonous monsters and suffer no harm. (Manilus, book 5 of Astronomica, 1st century AD).