12 Pegasi

K-type supergiant star in the constellation of Pegasus Pegasus constellation map.svg center 280 right Red circle.svg 10 12 Pegasi 734 378 Location of 12 Pegasi (circled) J2000.0 Pegasus 21 46 04.364 +22 56 55.96 +5.266 Supergiant K0IbHdel0.5 +1.41 +1.33 −10.140.20 8.299 −2.478 2.3673 0.1279 −4.03 6.3 81 1,722–1,820 4,185 +0.03 1.11 19.5 19.8 12 Peg 8321 207089 +22°4472 107472 113549 3739 30479 89962 12+Peg 12 Pegasi is a K-type supergiant star in the northern constellation of Pegasus. It is faintly visible to the naked eye with an apparent visual magnitude of +5.3. Based on parallax measurements, it is located at a distance of approximately 1,380 ly pc out on from the Earth. The star is drifting closer with a line of sight velocity component of −10.1 km/s. This evolved star has a spectral type of K0Ib Hdel0.5, which indicates that it is a less luminous K-type supergiant with strong H-δ Balmer lines. It is an estimated 20 million years old and is spinning with a projected rotational velocity of 19.5 km/s. With 6.3 times the mass of the Sun, it has expanded to 81 times the radius of the Sun. The star is radiating 1,722–1,820 times the luminosity of the Sun from its photosphere at an effective temperature of 4,185 K. References 1794238260239888768 2026-03-28 1794238260239888768 2026-03-28 12 Peg 2026-03-28 Keenan Philip C. McNeil Raymond C. October 1989 The Perkins catalog of revised MK types for the cooler stars The Astrophysical Journal Supplement Series 71 245–266 1989ApJS...71..245K 10.1086/191373 123149047 0067-0049 Messineo M. Brown A. G. A. July 2019 A Catalog of Known Galactic K-M Stars of Class I Candidate Red Supergiants in Gaia DR2 The Astronomical Journal 158 1 20 1905.03744 2019AJ....158...20M 10.3847/1538-3881/ab1cbd 148571616 0004-6256 free 1 Høg E. Fabricius C. Makarov V. V. Urban S. Corbin T. Wycoff G. Bastian U. Schwekendiek P. Wicenec A. The Tycho-2 catalogue of the 2.5 million brightest stars Astronomy and Astrophysics March 2000 355 L27–L30 2000A&A...355L..27H 0004-6361 Keenan Philip C. McNeil Raymond C. The Perkins Catalog of Revised MK Types for the Cooler Stars The Astrophysical Journal Supplement Series October 1989 71 245 10.1086/191373 0067-0049 1989ApJS...71..245K 2020yCatp017036502M VizieR Online Data Catalog: Kinematic data for high luminosity stars (Melnik+, 2020) Melnik A. M. Dambis A. K. Vizier Online Data Catalog (Other) 2020 1 Tetzlaff N. Neuhäuser R. Hohle M. M. A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun Monthly Notices of the Royal Astronomical Society 410 1 190–200 January 2011 10.1111/j.1365-2966.2010.17434.x free 2011MNRAS.410..190T 1007.4883 118629873 Wu Yue Singh H. P. Prugniel P. Gupta R. Koleva M. 1 Coudé-feed stellar spectral library – atmospheric parameters Astronomy & Astrophysics 525 A71 2010 2011A&A...525A..71W 1009.1491 10.1051/0004-6361/201015014 53480665 A catalog of rotational and radial velocities for evolved stars. II. Ib supergiant stars Astronomy and Astrophysics 1 De Medeiros J. R. Udry S. Burki G. Mayor M. 395 97–98 2002 2002A&A...395...97D 10.1051/0004-6361:20021214 free https://repositorio.ufrn.br/bitstream/123456789/28828/1/ACatalogOfRotationalAndRadial_Medeiros_2014.pdf Category:K-type supergiants Category:Pegasus (constellation) 8321 Category:Durchmusterung objects Pegasi, 12 207089 107472