109 Piscium

Star in the constellation Pisces February 2020 Pisces constellation map.svg center 280 right Red circle.svg 10 109 Piscium 170 375 Location of 109 Piscium (circled in red) J2000.0 Pisces 01 44 55.8255 +20 04 59.337 6.27 subgiant G3 Va 0.720 0.009 −45.53 0.09 −43.357 (42) −104.936 (34) 30.1535 0.0402 3.73 1.11 0.03 1.92 0.05 2.89 0.08 4.05 0.05 5641 28 commas 0.15 0.04 32.6 1.6 days 1.3 6.75 0.71 109 Psc +19°282 72 10697 8159 508 109+Psc HD-10697 109 Piscium is a yellow hued G-type subgiant star located about 108 light-years away in the zodiac constellation of Pisces. It is near the lower limit of visibility to the naked eye with an apparent visual magnitude of 6.27. The star is moving closer to the Earth with a heliocentric radial velocity of −45.5 km/s. It has one known exoplanet. With a stellar classification of G3 Va, this is a Sun-like star with a similar mass but a 91% larger radius. (Cowley and Bidelman (1979) had this classified as a subgiant star that is leaving the main sequence.) It is 6.75 billion years old with a higher abundance of iron and a low projected rotational velocity of 1.3 km/s. The star is radiating 2.9 times the Sun's luminosity from its photosphere at an effective temperature of 5442 commas K. Planetary system On 1 November 1999 the discovery of an extrasolar planet orbiting this star was announced. The planet has a minimum mass of about 6 times that of Jupiter and takes just under three years to orbit its parent star. It orbits within the habitable zone. The star rotates at an inclination of 6921 26 degrees relative to Earth. It is probable that this planet shares that inclination.https://exoplanet.eu/catalog/hd_10697_b--95/ hd_10697_b 26 November 1995 Extrasolar Planets Encyclopaedia 12 November 2012Starspots and spin-orbit alignment for Kepler cool host stars Astronomische Nachrichten 334 1–2 180–183 Roberto Sanchis-Ojeda Josh N. Winn Daniel C. Fabrycky 2012 1211.2002 2013AN....334..180S 10.1002/asna.201211765 38743202 In 2022, the inclination and true mass of 109 Piscium b were measured via astrometry. The inclination estimate is consistent with that of the stellar rotation. A candidate second planet was identified in a 2026 study using HARPS-N. This would be a hot Neptune, orbiting close to the star with an 8-day period. .01 16.6 2.6 ≥ 8.1127 0.0006 0.18 0.15 0.12 b 2.143 0.062 0.063 6.77 0.89 0.56 1075.50 0.69 commas 0.1035 0.0072 0.0073 72 13 15 or 108 15 13 Popular culture In the 1983 Star Trek novel The Wounded Sky by Diane Duane, the USS Enterprise intentionally causes 109 Piscium to go supernova by engaging its warp drive too close to the star, in order to destroy a group of pursuing Klingon vessels. Mr. Spock informs the "Interstellar Astronomical Union" of the change in status of the star, and Captain Kirk experiences an uneasy sense that he may "get in trouble with Starfleet" over this arguably rash course of action.November 2025 See also 54 Piscium Lists of exoplanets Giant planets in the habitable zone References 8159 Pizzolato N. Maggio A. Sciortino S. Evolution of X-ray activity of 1-3 Msun late-type stars in early post-main-sequence phases Astronomy and Astrophysics 361 614–628 2000A&A...361..614P . September 2000 Stellar parameters and chemical abundances of 223 evolved stars with and without planets Astronomy & Astrophysics 1 Jofré E. Petrucci R. Saffe C. Saker L. de la Villarmois E. Artur Chavero C. Gómez M. Mauas P. J. D. 574 A50 2015 . 2015A&A...574A..50J 10.1051/0004-6361/201424474 1410.6422 53666931 P. Keenan R. McNeil The Perkins catalog of revised MK types for the cooler stars Astrophysical Journal Supplement Series 71 245–266 October 1989 1989ApJS...71..245K 10.1086/191373 . 1 Ghezzi L. Cunha K. Schuler S. C. Smith V. V. Metallicities of Planet-hosting Stars: A Sample of Giants and Subgiants The Astrophysical Journal 725 1 721–733 10.1088/0004-637X/725/1/721 2010ApJ...725..721G . 1008.3539 December 2010 119206634 Stellar Diameters and Temperatures. III. Main-Sequence A, F, G, and K Stars: Additional High-Precision Measurements and Empirical Relations Boyajian Tabetha S. von Braun Kaspar Van Belle Gerard Farrington Chris Schaefer Gail Jones Jeremy White Russel McAlister Harold A. Ten Brummelaar Theo A. Ridgway Stephen Gies Douglas Sturmann Laszlo Sturmann Judit Turner Nils H. Goldfinger P. J. Vargas Norm 1 The Astrophysical Journal 771 1 40 2013 1306.2974 2013ApJ...771...40B 10.1088/0004-637X/771/1/40 free 1 Simpson E. K. Baliunas S. L. Henry G. W. Watson C. A. Rotation periods of exoplanet host stars Monthly Notices of the Royal Astronomical Society 408 3 1666–1679 10.1111/j.1365-2966.2010.17230.x 2010MNRAS.408.1666S . 1006.4121 November 2010 free 6708869 as "HD 10697" 95652018353917056 Astronomers discover six new planets orbiting nearby stars 1 November 1999 W. M. Keck Observatory Kamuela, Hawaii http://www.keckobservatory.org/astronomers_discover_six_new_planets_orbiting_nearby_stars/ 19 December 2017 109 Psc -- High proper-motion Star 2017-12-20 Six New Planets from the Keck Precision Velocity Survey Vogt Steven S. Marcy Geoffrey W. Butler R. Paul Apps Kevin 1 The Astrophysical Journal 536 2 902–914 2000 astro-ph/9911506 2000ApJ...536..902V free 10.1086/308981 free Cowley A. P. Bidelman W. P. MK spectral types for some F and G stars Publications of the Astronomical Society of the Pacific 91 83–86 February 1979 10.1086/130446 1979PASP...91...83C Feng Fabo Butler R. Paul etal August 2022 3D Selection of 167 Substellar Companions to Nearby Stars The Astrophysical Journal Supplement Series 262 21 21 10.3847/1538-4365/ac7e57 2208.12720 2022ApJS..262...21F 251864022 free Xiao Guang-Yao Liu Yu-Juan etal May 2023 The Masses of a Sample of Radial-Velocity Exoplanets with Astrometric Measurements Research in Astronomy and Astrophysics 23 5 055022 10.1088/1674-4527/accb7e 2303.12409 2023RAA....23e5022X 257663647 Ruggieri A. Desidera S. etal July 2026 The GAPS Programme with HARPS-N at TNG LXXVII. Occurrence rates of small close-in planets in the presence of cold Jupiters Astronomy & Astrophysics 2607.09320 External links http://exoplanet.eu/star.php?st=HD+10697 https://web.archive.org/web/20071106054135/http://exoplanet.eu/star.php?st=HD+10697 dead 6 November 2007 Extrasolar Planets Encyclopaedia Notes for star HD 10697 17 April 2006 http://www.solstation.com/stars2/109psc.htm 109 Piscium SolStation 17 April 2006 https://web.archive.org/web/20060316180209/http://solstation.com/stars2/109psc.htm 16 March 2006 01 44 55 + 20 04 59 106.2 Category:G-type subgiants Piscium, 109 Category:Pisces (constellation) BD+19 0282 0072 010697 08159 0508 Category:Planetary systems with one confirmed planet