17 Leporis

Star in the constellation Lepus 280px A light curve for SS Leporis, plotted from Hipparcos data J2000.0 J2000.0 (ICRS) Lepus 06 04 59.12945 −16 29 03.9692 4.82 to 5.06 A1V + M6III +0.12 (combined) +0.24 (combined) +0.52 (combined) Z And +18.74 0.10(center of mass) −5.955 −3.680 3.5742 0.0992 260.34 1.80 days 4.492 0.014 mas 0.005 0.003 143.7 0.5 162.2 0.7 2448528.78 0.37 HJD commas 203.7 0.4 6.1 1.0 21.32 0.21 A-type star 2.71 0.27 18 9,000 1,900 2.0 M giant 1.30 0.33 66.7 3.3 3,250 1,200 1.0 17 Lep SS Lep −16°1349 41511 28816 2148 151093 17+Lep 17 Leporis is a binary star system in the southern constellation of Lepus. It has an overall apparent visual magnitude which varies between 4.82 and 5.06, making it luminous enough to be visible to the naked eye as a faint star. The variable star designation for this system is SS Leporis, while 17 Leporis is the Flamsteed designation. Parallax measurements yield a distance estimate of around 910 light years from the Sun. The system is moving further away from the Earth with a heliocentric radial velocity of +18.7 km/s. This is a double-lined spectroscopic binary system with an orbital period of 260 days and an eccentricity of 0.005. The spectrum reveals the pair to consist of an A-type main-sequence star with a stellar classification of A1 V, and a red giant with a class of M6III. The close pair form a symbiotic binary with ongoing mass transfer from the giant to the hotter component. The giant does not appear to be filling its Roche lobe, so the mass transfer is coming from stellar wind off the giant. The pair are surrounded by a shell and a dusty circumbinary disk, with the former obliterating the lines from the A-type star. Gallery nolines center File:Zooming in on the unusual double star SS Leporis.ogv This zoom sequence starts with a broad view of the spectacular Milky Way. It then closes in on the small constellation of Lepus (The Hare) and finally focuses on 17 Lep. File:Wide field SS Leporis.jpg Wide field around SS Leporis. The field of view is approximately 2.7 degrees. References 2991407583086382592 17 Lep 2019-05-31 https://cdsarc.cds.unistra.fr/viz-bin/ftp-index?/ftp/cats/more/HIP/cdroms/cats Centre de Données astronomiques de Strasbourg /ftp/cats/more/HIP/cdroms/cats Strasbourg astronomical Data Center 15 October 2022 SS Lep, database entry http://www.sai.msu.su/groups/cluster/gcvs/gcvs/iii/iii.dat The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars Sternberg Astronomical Institute Moscow, Russia September 9, 2009 June 20, 2017 https://web.archive.org/web/20170620004609/http://www.sai.msu.su/groups/cluster/gcvs/gcvs/iii/iii.dat dead §3.1, Direct diameter measurement of a star filling its Roche lobe. The semi-detached binary SS Leporis spatially resolved with VINCI/VLTI T. Verhoelst E. van Aarle B. Acke Astronomy and Astrophysics 470 3 August 2007 L21–L24 10.1051/0004-6361:20077840 2007A&A...470L..21V 0705.4410 14471349 http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=V/50/catalog&recno=2148 HR 2148 database entry, The Bright Star Catalogue 5th Revised (Preliminary Version) D. Hoffleit W. H. Warren, Jr. CDS September 9, 2009 Alan D. Welty Richard A. Wade On the nature of 17 Leporis The Astronomical Journal 109 1669 January 1995 326–331 10.1086/117276 1995AJ....109..326W free Seet Table 2. An incisive look at the symbiotic star SS Leporis. Milli-arcsecond imaging with PIONIER/VLTI 1 Blind N. Boffin H. M. J. Berger J.-P. Le Bouquin J.-B. Mérand A. Lazareff B. Zins G. Astronomy & Astrophysics 536 A55 11 December 2011 10.1051/0004-6361/201118036 2011A&A...536A..55B 1112.1514 118482471 Category:Emission-line stars Category:Circumstellar disks Category:Lepus (constellation) BD-16 1349 Leporis, 17 041511 028816 2148 Leporis, SS Category:Articles containing video clips Category:Spectroscopic binaries Category:A1V stars Category:M6III stars