Star in the constellation Vulpecula
19 Vulpeculae is star located approximately 1,690 light years from Earth in the northern constellation of Vulpecula . It is a probable member of the open cluster NGC 6882 . This object is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 5.40. It is moving closer to the Earth with a heliocentric radial velocity of −19 km/s.
This is an aging giant star with a stellar classification of K2 IIIa, having already consumed the hydrogen at its core and evolved away from the main sequence . It has nearly five times the mass of the Sun but has expanded to around 100 times the Sun's radius . The star is radiating 2,889 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,200 K.
References
^ Brown, A. G. A. ; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties" . Astronomy & Astrophysics 616 . A1. arXiv :1804.09365 . Bibcode :2018A&A...616A...1G . doi :10.1051/0004-6361/201833051 .Gaia DR2 record for this source at VizieR .
^ Fernie, J. D. (1983). "New UBVRI photometry for 900 supergiants" . Astrophysical Journal Supplement Series . 52 : 7. Bibcode :1983ApJS...52....7F . doi :10.1086/190856 .
^ Keenan, Philip C.; McNeil, Raymond C. (1989). "The Perkins catalog of revised MK types for the cooler stars". Astrophysical Journal Supplement Series . 71 : 245. Bibcode :1989ApJS...71..245K . doi :10.1086/191373 .
^ Mermilliod, J. C.; et al. (2008). "Red giants in open clusters. XIV. Mean radial velocities for 1309 stars and 166 open clusters". Astronomy & Astrophysics . 485 (1): 303–314. Bibcode :2008A&A...485..303M . CiteSeerX 10.1.1.30.7545 . doi :10.1051/0004-6361:200809664 .
Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters . 38 (5): 331. arXiv :1108.4971 . Bibcode :2012AstL...38..331A . doi :10.1134/S1063773712050015 . S2CID 119257644 .
^ Hohle, M.M.; et al. (2010). "Masses and luminosities of O- and B-type stars and red supergiants". Astronomische Nachrichten . 331 (4): 349. arXiv :1003.2335 . Bibcode :2010AN....331..349H . doi :10.1002/asna.200911355 . S2CID 111387483 .
^ Luck, R. Earle (March 1994). "Open Cluster Chemical Composition. I. Later Type Stars in Eight Clusters". Astrophysical Journal Supplement . 91 : 309. Bibcode :1994ApJS...91..309L . doi :10.1086/191940 .
De Medeiros, J. R.; et al. (November 2000). "Rotation and lithium in single giant stars". Astronomy and Astrophysics . 363 : 239–243. arXiv :astro-ph/0010273 . Bibcode :2000A&A...363..239D .
^ "19 Vulpeculae" . SIMBAD Centre de données astronomiques de Strasbourg . Retrieved 2018-11-18.
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