Vanant is the Avestan language

Avestan language

Avestan is an East Iranian language known only from its use as the language of Zoroastrian scripture, i.e. the Avesta, from which it derives its name...

 name of a minor Zoroastrian

Zoroastrianism

Zoroastrianism is a religion and philosophy based on the teachings of prophet Zoroaster and was formerly among the world's largest religions. It was probably founded some time before the 6th century BCE in Greater Iran.In Zoroastrianism, the Creator Ahura Mazda is all good, and no evil...

 divinity. The name literally means "conqueror", but in Zoroastrian tradition Vanant is the hypostasis of the "star of the west", variously identified with Altair, Fomalhaut

Fomalhaut

Fomalhaut is the brightest star in the constellation Piscis Austrinus and one of the brightest stars in the sky. Fomalhaut can be seen low in the southern sky in the northern hemisphere in fall and early winter evenings. Near latitude 50˚N, it sets around the time Sirius rises, and does not...

, Vega

Vega

Vega is the brightest star in the constellation Lyra, the fifth brightest star in the night sky and the second brightest star in the northern celestial hemisphere, after Arcturus...

, Sargas or Kappa Scorpii/Girtab

Kappa Scorpii

Kappa Scorpii is a star in the constellation Scorpius. It has the traditional name Girtab, which is the Sumerian word for 'scorpion' and has survived through the Babylonian star catalogues....

.

Vanant may have its origins in the Sumero-Akkadian

Babylonia

Babylonia was an ancient cultural region in central-southern Mesopotamia , with Babylon as its capital. Babylonia emerged as a major power when Hammurabi Babylonia was an ancient cultural region in central-southern Mesopotamia (present-day Iraq), with Babylon as its capital. Babylonia emerged as...

 Vanand, perhaps incorporated in the Zoroastrian pantheon as a consequence of the close relations between Iran and Babylon during the late Achaemenid era.

Vanant has no calendrical dedication (see Zoroastrian calendar

Zoroastrian calendar

This article treats of the reckoning of days, months and years in the calendar used by adherents of the Zoroastrian faith. Zoroastrian religious festivals are discussed elsewhere, but have a fixed relationship to Nawruz, the New Year festival, whose timing is discussed below...

), but is invoked together with the other astral divinities on the second and third days of the month. From amongst the hymns invoking divinities, Yasht

Yasht

The s are a collection of twenty-one hymns in Younger Avestan. Each of these hymns invokes a specific Zoroastrian divinity or concept. Yasht chapter and verse pointers are traditionally abbreviated as Yt....

21 is dedicated to Vanant. The divinity is also invoked in the hymn dedicated to Tishtrya

Tishtrya

Tishtrya is the Avestan language name of an Zoroastrian benevolent divinity associated with life-bringing rainfall and fertility. Tishtrya is Tir in Middle- and Modern Persian...

, another star yazata

Yazata

Yazata is the Avestan language word for a Zoroastrian concept. The word has a wide range of meanings but generally signifies a divinity...

for whom Vanant is a constant companion.

In Zoroastrian tradition Vanant is considered to a guardian of goodness. An invocation of the Vanant Yasht is believed to be a potent remedy for fighting evil.