Iota Piscium ( Iota Psc, ι Piscium, ι Psc) is a star located in the constellation Pisces. With an apparent magnitude of +4.13, it is visible to the naked eye. Parallax measurements give a distance of 44.73 .
Its spectral type is F7V,[ with the luminosity class V suggesting it is in the main sequence, fusing atoms of hydrogen into helium. The star has 1.15 times the Sun's mass and 1.60 times the Sun's radius. It is radiating 3.6 times the Sun's luminosity at an effective temperature of .][ It is a suspected variable star.][
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The star was once thought to have one or two stellar companions, but both are line-of-sight coincidences.[ It displays a far-infrared excess at a wavelength of 70μm, suggesting it is being orbited by a cold debris disk.][
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Naming
In Chinese, 霹靂 (Pī Lì), meaning Thunderbolt, refers to an asterism consisting of ι Piscium, Beta Piscium, Gamma Piscium, Theta Piscium, and Omega Piscium. Consequently, the Chinese name for ι Piscium itself is 霹靂四 (Pī Lì sì, .)[ AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 8 日 ]