The primary component, Epsilon Sculptoris A, is a yellow-whiteF-type main-sequence star[4] with an apparent magnitude of +5.34.[17] Orbiting it with a separation of 4.6arcseconds, or at least 125astronomical units, is Epsilon Sculptoris B, a yellowG-typemain sequence dwarf with an apparent magnitude of +8.50.[18] A and B make one orbit around their centre of mass once every 1200 years.[19]
There are two optical companions, the 15th magnitude designated Epsilon Sculptoris C at anangular separation of 15arcseconds and the 11th magnitude Epsilon Sculptoris D, at a separation of 142arcseconds.[20] Both these faint stars have smallGaia parallaxes indicating a much greater distance than the Epsilon Sculptoris pair.[21]
The designation Epsilon Sculptoris hasn’t always been allocated to this star. It was given this designation by Lacaille when he created Sculptor. WhenBode created his own constellationMachina Electrica, he took about half of Sculptor and parts ofFornax, including this star, which he designatedAlpha Machinae Electricae, though the starNu Fornacis was the brightest star. Bode used Epsilon Sculptoris forHD 344 (HR 13) instead. After Machina Electrica was deemed obsolete by theIAU, the stars were returned to their original constellations.[22]
This star will be in the constellationFornax around 2920 CE.[23]
^abGray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. (2006). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc--The Southern Sample".The Astronomical Journal.132 (1):161–170.arXiv:astro-ph/0603770.Bibcode:2006AJ....132..161G.doi:10.1086/504637.S2CID119476992.
^abMermilliod, J. C. (2006). "VizieR Online Data Catalog: Homogeneous Means in the UBV System (Mermilliod 1991)".VizieR On-line Data Catalog: II/168. Originally Published in: Institut d'Astronomie.2168.Bibcode:2006yCat.2168....0M.Vizier catalog entry
^Allende Prieto, C.; Lambert, D. L. (1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: Masses, radii and effective temperatures".Astronomy and Astrophysics.352:555–562.arXiv:astro-ph/9911002.Bibcode:1999A&A...352..555A.Vizier catalog entry
^Hoffleit, D.; Warren, W. H. (1995). "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.Bibcode:1995yCat.5050....0H.
^Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars".Astronomy and Astrophysics.355.Bibcode:2000A&A...355L..27H.
^Zacharias, N.; Finch, C. T.; Girard, T. M.; Henden, A.; Bartlett, J. L.; Monet, D. G.; Zacharias, M. I. (2012). "VizieR Online Data Catalog: UCAC4 Catalogue (Zacharias+, 2012)".Vizier Online Data Catalog.Bibcode:2012yCat.1322....0Z.
