History of the star: A star in the vane of the Arrow on the Archer's hand in Sagittarius. This has been identified with Nunki of the Euphratean Tablet of the Thirty Stars, "the Star of the Proclamation of the Sea", or the "Voice from the Sea", and portended favorable events for mariners and shipping.

Sigma (this star Nunki), with zeta (Ascella), and pi (Albadah), may have been the Akkadian Gu-shi-rab-ba, "the Yoke of the Sea".

In ancient Arabia the two small groups of stars now marking the head and the vane of the Archer's arrow were of much note as relics of still earlier asterisms, as well as a lunar station. The westernmost of these, — gamma (Alnasl), delta (Kaus Medius), epsilon (Kaus Australis), and eta — were Al Na'am al Warid, the Going Ostriches; and the easternmost, — sigma (this star Nunki), zeta (Ascella), phi, chi, and tau, — Al Na'am al Sadirah, the Returning Ostriches, passing to and from the celestial river, the Milky Way, with the star lamda (Kaus Borealis) for their Keeper.

All of the foregoing stars were included in the Arabic 18th manzil, Al Na'am.

In India this star marked the junction of the nakshatra Ashadha with Abhijit.

[Star Names, Their Lore and Meaning, Richard Hinchley Allen, 1889]. 

Listed as Pelagus (Latin for "sea") in Vivian Robson's book. 

Influences of the Arabic 18th manzil, Al Na'am: Helps the taming of wild beasts, strengthening of prisons, destroys the wealth of societies and compels a man to come to a certain place. With Moon transiting here; build, ask favors but do not marry. (Robson*).

The astrological influences of the constellation: The Archer is associated with the Hebrew letter Vau and the 6th Tarot Trump "The Lovers". (Robson*).

The astrological influences of the constellation given by Manilius:

"As for the Archer, when the foremost portion of his cloak rises, he will give birth to hearts renowned in war and will conduct the conqueror, celebrating great triumphs in the sight of all, to his country's citadels. Such a one will build high walls (moenia from Latin murus) one moment and pull them down the next. But if Fortune favours them too generously with success, the mark of her envy is to be seen on their faces, for she works cruel havoc upon their features. So was it that a dread warrior^* paid for his victories at the Trebia, Cannae, and the Lake, even before the hour of his retreat, with such disfigurement." [Translator's note: *Hanibal who lost an eye (Livy 22.2.11: Sagittarius is one-eyed; see p.103) [Manilius, Astronomica, 1st century AD, book 4, p.267]

But they whose lot it is to be born under the Centaur of double form delight in yoking a team, in bringing a fiery horse to obey the pliant reins, in following herds which graze all over the grasslands, and in imposing a master on every kind of quadruped and taming them: they soften tigers, rid the lion of his fierceness, speak to the elephant and through speech adapt its huge bulk to human skills in a variety of displays. Indeed, in the stars of this constellation the human form is blended with a beast's and placed above it; wherefore it has lordship over beasts. And because it carries a shaft poised on drawn bow, it imparts strength to limb and keenness to the intellect, swiftness of movement, and an indefatigable spirit. [Manilius, Astronomica, 1st century AD, book 4, p.241.]

Pelagus is an indicator of one who may be expected to be an authoritative orator on Sagittarius and Capricorn topics on business, state or foreign affairs, religion. Interest in long distance travel and in ships and airplanes. (The Living Stars, Dr. Eric Morse).

With Sun: Influential public position, favorable for domestic and family matters. (Robson*).

With Moon: Successful writer on science, philosophy, education or agriculture, unorthodox in religion, defeats enemies, many friends, illness of a Saturnian nature. (Robson*).

With Mercury: High government position, popular criticism, wealth, anxiety on account of illness to wife or mother. (Robson*).

With Venus: Heart rules head, favors from opposite sex, many friends. (Robson*).

With Mars: Reserved, diplomatic, strong mind, courageous, energetic, straightforward, false friends, favorable for gain. (Robson*).

With Jupiter: Diplomatic, philosophical mind, writer, ecclesiastical or legal preferment. (Robson*).

With Saturn: Thoughtful, reserved, self -centred, success delayed until after 50, ambition thwarted by enemies, danger of disgrace, wealth at end of life, trouble to parents, favorable marriage late in life, usually at least one child. (Robson*).

With Uranus: Proud, industrious, aggressive, high government or business position, early disgrace, especially if female, favorable for marriage in middle age, sudden gains and losses, many friends, natural death. (Robson*).

With Neptune: Practical, occult interests, wealthy, associated with large concerns, some domestic disagreements, defeats enemies, natural death in old age. (Robson*).

References

*(Fixed Stars and Constellations in Astrology , Vivian E. Robson, 1923)