18 Monocerotis

Star in the constellation Monoceros 18 Monocerotis Monoceros constellation map.svg center 280 right Red circle.svg 10 18 Monocerotis 456 224 Location of 18 Monocerotis (circled red) J2000 Monoceros 06 47 51.647523126448158102337920 +02 24 43.7737 4.472002yCat.2237....0D VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system CDS/ADC Collection of Electronic Catalogues 2237 Ducati J. R. 2002 K0+IIIaBa0.21995yCat.5050....0H VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991) VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H 5050 Hoffleit D. Warren W. H. 1995 +1.11 +1.04 +11.2910.1051/0004-6361:20041272 2005A&A...430..165F astro-ph/0409579 Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data Astronomy & Astrophysics 430 165–186 2005 Famaey B. Jorissen A. Luri X. Mayor M. Udry S. Dejonghe H. Turon C. 17804304 -16.898 -16.229 8.0947 0.2385 -0.782012AstL...38..331A 10.1134/S1063773712050015 1108.4971 XHIP: An extended hipparcos compilation Astronomy Letters 38 5 331 2012 Anderson E. Francis Ch. 119257644 Vizier catalog entry The Hipparcos and Tycho Catalogues ESA VizieR On-line Data Catalog 1997 1997yCat.1239....0E 18 Monocerotis A 18 Monocerotis B 1760.9 1.9 days 6.63 mas 96.25 47.63 2441942.5 0.40 0.04 172 6 3.97 0.21 18 Mon A 26.95 1.56 0.81 4,7502008AstL...34..785G 10.1134/S1063773708110078 1607.00619 Red giant clump in the Tycho-2 catalogue Astronomy Letters 34 11 785–796 2009 Gontcharov G. A. 73524157 Vizier catalog entry 311.2 10.5 < 2.01999A&AS..139..433D 10.1051/aas:1999401 A catalog of rotational and radial velocities for evolved stars Astronomy and Astrophysics Supplement Series 139 3 433 1999 De Medeiros J. R. Mayor M. astro-ph/0608248 Vizier catalog entry 2.592016A&A...591A.118S 10.1051/0004-6361/201628497 1605.07384 The PASTEL catalogue: 2016 version Astronomy & Astrophysics 591 A118 2016 Soubiran Caroline Le Campion Jean-François Brouillet Nathalie Chemin Laurent 119258214 -0.03 18 Mon +02°1397 258 49293 32578 2506 114428 8892 18 Mon 2019-05-30 18+Monocerotis 18 Monocerotis is a binary star system located about halfway from Orion's Belt to Procyon, in the equatorial constellation of Monoceros. It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.47, and is positioned around 370 light years away from the Sun based on parallax. The system is receding from the Earth with a heliocentric radial velocity of +11 km/s. It is reported as a single-lined spectroscopic binary with an orbital period of 1760.9 days years off 2 and an eccentricity of 0.4.1984Obs...104..267G Spectroscopic binary orbits from photoelectric radial velocities. Paper 59: 18 Monocerotis The Observatory 104 267 Griffin R. F. 1984 The visible component is an aging K-type giant star with a stellar classification of K0+IIIaBa0.2, showing a slight overabundance of barium. The spectrum displays strong violet lines of CN. With the supply of hydrogen at its core exhausted, this star has expanded to 27 times the radius of the Sun. It is radiating 311 times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,750 K. References Category:Monoceros BD+02 1397 Monocerotis, 18 049293 032578 2506 Category:Spectroscopic binaries Category:K0III stars