It has two components, designated Rho Scorpii A and B. Rho Scorpii A is itself a single-lined
spectroscopic binary whose components are designated Rho Scorpii Aa (formally named Iklil/ˈɪklɪl/, traditionally the name for several neighboring stars)[12] and Ab.
Nomenclature
ρ Scorpii (
Latinised to Rho Scorpii) is the system's
Bayer designation. The designations of the three constituents as Rho Scorpii A and B, and those of A's components - Rho Scorpii Aa and Ab - derive from the convention used by the Washington Multiplicity Catalog (WMC) for
multiple star systems, and adopted by the
International Astronomical Union (IAU).[13]
Rho Scorpii was likely part of the Arabic
lunar mansion of Iklil (الإكليل al-ʼiklīl) "the crown (of
the forehead)"), along with Beta, Delta, Pi and possibly Nu Scorpii.
In 2016, the IAU organized a
Working Group on Star Names (WGSN)[16] to catalog and standardize proper names for stars. The WGSN decided to attribute proper names to individual stars rather than entire
multiple systems.[17] It approved the name Iklil for the component Rho Scorpii Aa on 5 September 2017 and it is now so included in the List of IAU-approved Star Names.[12]
^
abcDucati, J. R. (2002), "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system", CDS/ADC Collection of Electronic Catalogues, 2237,
Bibcode:
2002yCat.2237....0D.
^Evans, D. S. (June 20–24, 1966), "The Revision of the General Catalogue of Radial Velocities", in Batten, Alan Henry; Heard, John Frederick (eds.), Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30, vol. 30, University of Toronto:
International Astronomical Union, p. 57,
Bibcode:
1967IAUS...30...57E.
^Hessman, F. V.; Dhillon, V. S.; Winget, D. E.; Schreiber, M. R.; Horne, K.; Marsh, T. R.; Guenther, E.; Schwope, A.; Heber, U. (2010). "On the naming convention used for multiple star systems and extrasolar planets".
arXiv:1012.0707 [
astro-ph.SR].
^(in Chinese)中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005,
ISBN978-986-7332-25-7.