112 Piscium

Star in the constellation Pisces Pisces constellation map.svg center 280 right Red circle.svg 10 112 Piscium 82 690 Location of 112 Piscium (circled in red) J2000 Pisces 02 00 09.15955 +03 05 49.2504 5.89 subgiant G2IV or G0V 0.610 −18.50 0.14 +230.826 −256.471 31.4492 0.0566 3.27 1.100 0.134 1.80 0.06 3.74 4.03 0.10 5967 70 +0.21 0.07 4.8 0.6 5.9 Zibbatu 112 Psc +02 311 2416 83.2 12235 9353 582 10682 413 145195 110266 *+112+Psc HD 12235 00173 112 Piscium, also named Zibbatu, is a star 103.7 ly pc on off away in the constellation Pisces. With an apparent magnitude of 5.9, it is faintly visible to the naked eye under good viewing conditions. It appears near the brighter star Alpha Piscium (Alrescha) in the sky; the two are about 35 arcmin apart. Nomenclature 112 Piscium is the star's Flamsteed designation; other designations include HD 12235 in the Henry Draper Catalogue. The Akkadian zibbātu "tails" is a Babylonian name for the constellation Pisces, which was originally visualized as the tails of a swallow (SIM.MAḪ). The IAU Working Group on Star Names adopted the name Zibbatu for 112 Piscium on 17 September 2026. Properties The stellar classification of 112 Piscium is G2IV, indicating that it is a G-type subgiant star that has evolved off the main sequence. Other sources classify it as G0V, matching a main-sequence star. Gaia DR3 supports a subgiant classification. This star has about 1.1 times the mass and 1.8 times the radius of the Sun, and is radiating 3.7 times the Sun's luminosity from its photosphere at an effective temperature of 5967 K. Classified as a population I star, it is older than the Sun and has a somewhat higher metallicity (abundance of elements heavier than helium). It is thought to be a member of the HR 1614 group of stars that share a common motion through space. Planetary system Two planetary companions to this star (HD 12235) were detected in 2022 using both radial velocity and astrometry. A companion was previously suspected. The inner planet has a minimum mass of about 10 Earth masses, making it a sub-Neptune; it orbits close to its star with a period of just 4.4 days. The outer planet is a super-Jupiter about 10 times the mass of Jupiter; it has a wide orbit with a period of about 100 years. b 10 1 2 ≥ 0.054 0.002 4.36305 0.00025 0.00042 0.38 0.11 0.25 c 9.9 3.2 1.8 22.2 3.9 2.8 36337 9732 6059 commas 0.17 0.11 0.15 47.7 12.7 11.8 References * 112 Psc 17 September 2026 HD 12235 2511794495013074048 9353 Astrophysical parameter tables [Gaia DR3 documentation] https://gea.esac.esa.int/archive/documentation/GDR3/Gaia_archive/chap_datamodel/sec_dm_astrophysical_parameter_tables/ssec_dm_astrophysical_parameters.html#astrophysical_parameters-evolstage_flame ESA 17 September 2026 Cowley A. P. Bidelman W. P. February 1979 MK spectral types for some F and G stars. Publications of the Astronomical Society of the Pacific en 91 83 10.1086/130446 free 0004-6280 1979PASP...91...83C Eggen O. J. November 1992 HR 1614 and the dissolution of a supercluster The Astronomical Journal 104 1906 10.1086/116366 free 1992AJ....104.1906E Fuhrmann Klaus Chini Rolf March 2021 On ancient solar-type stars – II Monthly Notices of the Royal Astronomical Society en 501 4 4903–4916 10.1093/mnras/staa3942 free 0035-8711 2021MNRAS.501.4903F Feng Fabo Butler R. Paul Vogt Steven S. Clement Matthew S. Tinney C. G. Cui Kaiming Aizawa Masataka Jones Hugh R. A. Bailey J. Burt Jennifer Carter B. D. Crane Jeffrey D. Dotti Francesco Flammini Holden Bradford Ma Bo 2 September 2022 3D Selection of 167 Substellar Companions to Nearby Stars The Astrophysical Journal Supplement Series 262 1 21 10.3847/1538-4365/ac7e57 free 0067-0049 2208.12720 2022ApJS..262...21F IAU Catalog of Star Names https://exopla.net/star-names/modern-iau-star-names/ 20 September 2026 Category:Pisces (constellation) Category:G2IV stars Category:Population I stars Category:Planetary systems with two confirmed planets Piscium, 112 0582 BD+02 0311 0083.2 012235 009353 Zibbatu