107 Piscium

Star in the constellation Pisces Pisces constellation map.svg center 280 right Red circle.svg 10 107 Piscium 185 370 Location of 107 Piscium (circled in red) J2000.0 J2000.0 (ICRS) Pisces 01 42 29.76349 +20 16 06.6602 5.14 to 5.26 K1V +0.49 +0.84 0.5 +0.43 Constant −33.619 0.0013 −301.592 −674.505 131.4903 0.1515 5.87 2.0 1.0 35.0 days 0.86 0.808 0.016 0.44 0.02 6.3 4.53 0.01 5221 4 commas −0.01 0.07 107 Psc 2 Arietis +19°279 J01425+2016A 2080 68 10476 7981 493 01371+1947 A 153 1287 10596 5685 91014 74883 01425+2016A 107+Psc 00148 107 Piscium is a single star in the constellation of Pisces. This star is faintly visible to the naked eye with an apparent visual magnitude that has been measured varying between 5.14 and 5.26. However, that finding of variation was not confirmed by subsequent observations and is most likely spurious data. It is located at a distance of about 24.8 light-years away from the Sun. 107 Piscium is drifting closer to the Sun with a radial velocity of −33.6, and is predicted to come as close as 4.7302 pc ly 1 out off in around 135,800 years. Nomenclature 107 Piscium is the star's Flamsteed designation. John Flamsteed numbered the stars of Pisces from 1 to 113, publishing his Catalogus Britannicus in 1725. He accidentally numbered 107 Piscium twice, as he also allocated it the designation of 2 Arietis. In Chinese astronomy, this was historically identified as the determinative star of the asterism Yòu Gēng (zh 右更, Official in Charge of Pasturing). Later versions of this asterism identified Rho Piscium as the first star. Properties This object is a K-type main-sequence star with a stellar classification of K1V, indicating it is generating energy from core hydrogen fusion. It is somewhat older than the Sun—approximately 6 billion years old. The star has 86% of the mass, 80.8% of the radius of the Sun, shines with 44% of the Sun's luminosity and has an effective temperature of 5221 commas K. It is rotating slowly with a period of 35.0 days. The abundance of elements other than hydrogen and helium—the star's metallicity—is slightly lower than that of the Sun. The level of chromospheric activity is similar to the Sun, and it shows a simple cycle of variation. 107 Piscium has been examined for the presence of an infrared excess caused by exozodiacal dust, but none was detected. The habitable zone for this star, defined as the locations where liquid water could be present on an Earth-like planet, is at a radius of 0.52–1.10 Astronomical Units (AU), where 1 AU is the average distance from the Earth to the Sun. In 1997, based on data collected during the Hipparcos mission, the star was categorized as an astrometric binary with a period of 0.576 years. However, this result has not been confirmed. 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