107 Piscium

107 Piscium is a single star in the constellation of Pisces. 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. 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 $−33.619$ 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 in around 135,800 years.

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 and 82% of the radius of the Sun, but shines with only 46% of the Sun's luminosity. The effective temperature of the star is $2$. It is rotating slowly with a period of $0.82$. 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–$4.57$ (AU), where $5,172$ 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 $−0.01$. However, this result has not been not confirmed.