107 Piscium is a single[13]star in theconstellation ofPisces.107 Piscium is the star'sFlamsteed designation.John Flamsteed numbered the stars of Pisces from 1 to 113, publishing hisCatalogus Britannicus in 1725. He accidentally numbered 107 Piscium twice, as he also allocated it the designation of 2 Arietis.[14] This star is faintly visible to the naked eye with anapparent visual magnitude that has been measured varying between 5.14 and 5.26.[2] However, that finding of variation was not confirmed by subsequent observations and is most likely spurious data.[6] It is located at a distance of about24.8 light years away from theSun.[1] 107 Piscium is drifting closer to the Sun with aradial velocity of −33.6,[7] and is predicted to come as close as 15.4 light-years in around 135,800 years.[15]
This object is aK-type main-sequence star with astellar classification of K1V,[3] indicating it is generating energy fromcorehydrogen fusion. It is somewhat older than the Sun—approximately 6 billion years old.[11] The star has 86% of the mass and 82% of the radius of the Sun,[9] but shines with only 46% of the Sun's luminosity.[8] Theeffective temperature of the star is5,172 K.[9] It is rotating slowly with a period of35.0 d.[10] The abundance of elements other than hydrogen and helium—the star'smetallicity—is slightly lower than that of the Sun.[16] The level ofchromospheric activity is similar to the Sun, and it shows a simple cycle of variation.[17][18]
107 Piscium has been examined for the presence of aninfrared excess caused byexozodiacal dust, but none was detected.[19] Thehabitable 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), where1 AU is the average distance from the Earth to the Sun.[19]
In 1997, based on data collected during theHipparcos mission, the star was categorized as an astrometric binary with a period of0.576 years. However, this result has not been not confirmed.[20]
^abKeenan, Philip C.; McNeil, Raymond C. (1989). "The Perkins catalog of revised MK types for the cooler stars".The Astrophysical Journal Supplement Series.71: 245.Bibcode:1989ApJS...71..245K.doi:10.1086/191373.
^abcHR 493, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr.,CDS IDV/50. Accessed on line September 24, 2008.
^abcHD 10476, catalog entry, Fundamental parameters and elemental abundances of 160 F-G-K stars based on OAO spectrum database, Y. Takeda,CDS IDJ/PASJ/59/335; see alsoPublications of the Astronomical Society of Japan59, #2 (April 2007), pp. 335–356,Bibcode:2007PASJ...59..335T.
^HD 10476, database entry, The Geneva-Copenhagen Survey of Solar neighbourhood, J. Holmberg et al., 2007,CDS IDV/117A. Accessed on line November 19, 2008.
