15 Lacertae

Star in the constellation Lacerta Lacerta constellation map.svg center 240 right Red circle.svg 10 15 Lacertae 338 820 Location of 15 Lacertae (circled in red) J2000 Lacerta 22 52 02.03323 +43 18 44.7028 4.95 + 11.9 M0 III 1.559 0.010 −19.21 0.20 +109.890 0.214 +23.581 0.215 9.6841 0.1425 −0.04 1.3 35 269 1.79 4,047 −0.22 12.7 15 Lac +42°4521 31896 216397 112917 8699 52436 J22520+4319 15+Lac 15 Lacertae is a binary star system in the northern constellation of Lacerta, near the southeast constellation border with Andromeda. It is faintly visible to the naked eye with an apparent visual magnitude of 4.95. The distance to this system is approximately 337 light years based on parallax. It is drifting closer to the Sun with a radial velocity of −19 km/s. The absolute magnitude of 15 Lacertae is −0.04. The primary component is an aging red giant with a stellar classification of M0 III. With the supply of hydrogen at its core exhausted, the star has cooled and expanded to 35 times the Sun's radius. It is radiating 269 times the luminosity of the Sun from its swollen photosphere at an effective temperature of commas 4047 K giving it a reddish hue. The secondary companion was discovered by American astronomer S. W. Burnham in 1888. It has a visual magnitude of 11.9 and is located at an angular separation of 23.6 arcsecond from the primary along a position angle of 159°, as of 2014. References 1934658092817644928 15 Lac 2020-08-10 Stellar ages, masses, extinctions, and orbital parameters based on spectroscopic parameters of Gaia DR3 Kordopatis G. Schultheis M. McMillan P. J. Palicio P. A. De Laverny P. Recio-Blanco A. Creevey O. Álvarez M. A. Andrae R. Poggio E. Spitoni E. Contursi G. Zhao H. Oreshina-Slezak I. Ordenovic C. Bijaoui A. 1 Astronomy and Astrophysics 2023 669 A104 10.1051/0004-6361/202244283 2206.07937 2023A&A...669A.104K Khalatyan A. Anders F. Chiappini C. Queiroz A. B. A. Nepal S. Dal Ponte M. Jordi C. Guiglion G. Valentini M. Torralba Elipe G. Steinmetz M. Pantaleoni-González M. Malhotra S. Jiménez-Arranz Ó. Enke H. Casamiquela L. Ardèvol J. Transferring spectroscopic stellar labels to 217 million Gaia DR3 XP stars with SHBoost Astronomy and Astrophysics 2024 691 A98 10.1051/0004-6361/202451427 2407.06963 2024A&A...691A..98K 2023ApJS..268....4F Variability Catalog of Stars Observed during the TESS Prime Mission Fetherolf Tara Pepper Joshua Simpson Emilie Kane Stephen R. Močnik Teo English John Edward Antoci Victoria Huber Daniel Jenkins Jon M. Stassun Keivan Twicken Joseph D. Vanderspek Roland Winn Joshua N. The Astrophysical Journal Supplement Series 2023 268 1 4 10.3847/1538-4365/acdee5 free 2208.11721 Abt H. A. Visual multiples. VIII - 1000 MK types Astrophysical Journal Supplement Series 59 September 1985 95–112 10.1086/191064 1985ApJS...59...95A free XHIP: An extended hipparcos compilation Anderson E. Francis Ch. Astronomy Letters 1108.4971 38 5 331 2012 2012AstL...38..331A 10.1134/S1063773712050015 119257644 Eggleton P. P. Tokovinin A. A. A catalogue of multiplicity among bright stellar systems Monthly Notices of the Royal Astronomical Society 389 2 869–879 September 2008 2008MNRAS.389..869E 0806.2878 10.1111/j.1365-2966.2008.13596.x free 14878976 1 Mason B. D. Wycoff G. L. Hartkopf W. I. Douglass G. G. Worley C. E. The Washington Visual Double Star Catalog The Astronomical Journal 2014 122 6 3466 2001AJ....122.3466M 10.1086/323920 free Category:Binary stars Category:Lacerta BD+42 4521 Lacertae, 15 216397 112917 8699 Category:M0III stars