Magnitude 4.07 Apparent magnitude (V) 4.07 | Constellation Virgo | |
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Similar Eta Virginis, Delta Virginis, Zeta Virginis, Beta Virginis, Epsilon Virginis | ||
Iota Virginis (ι Virginis, abbreviated Iota Vir, ι Vir), also named Syrma, is a star in the constellation of Virgo.
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Nomenclature
ι Virginis (Latinised to Iota Virginis) is the star's Bayer designation.
It bore the traditional name Syrma, derived from the Arabic سرما (تطريز sirmā "train (of a garment)". In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN) to catalogue and standardize proper names for stars. The WGSN approved the name Syrma for this star on 12 September 2016 and it is now so entered in the IAU Catalog of Star Names.
In China, 亢宿 (Kàng Xiù), meaning Neck, refers to an asterism consisting of this star, Kappa Virginis, Phi Virginis and Lambda Virginis. Consequently, Iota Virginis itself is known as 亢宿二 (Kàngsuèr, English: the Second Star of Neck.)
Properties
Iota Virginis is a yellow star of apparent magnitude 4.08 and spectral class F7 III about 70 light years from Earth. This star has 1.52 times the mass of the Sun, with a projected rotational velocity of 14.8 km s−1. It is radiating 8.6 times the luminosity of the Sun from its outer atmosphere at an effective temperature of 6,282 K. The radius is about 2.5 times that of the Sun.