The annualparallax shift is 21.75 milliarcseconds,[2] which corresponds to a distance of the star of around 150light-years (46parsecs) from Earth. Relatively high proper motion resulted in the star crossing the border fromAquila intoDelphinus in 1992.[11][12] Rho Aquilae is therefore a rare occurrence of a mismatch between current constellation and Bayer designation constellation. The star is in the low-northernconstellation ofDelphinus therefore at least seasonally visible to all but the high southern latitudes. It is currently moving closer to the Sun.
This star has thetraditional nameTso Ke, from theCantonese 左旗jo keih meaning "the left flag". InChinese,左旗 (Zuǒ Qí inMandarin), within theOx, refers to an asterism consisting of this star,α,β,γ,δ,ζ,11,13, and14 Sagittae stars ofSagitta to the west.[13] Consequently, ρ Aquilae itself is known as左旗九 (Zuǒ Qí jiǔ, English:the Ninth Star of Left Flag.)[14]
^abcWielen, R.; et al. (1999), "Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions",Veroeffentlichungen des Astronomischen Rechen-Instituts Heidelberg,35 (35), Astronomisches Rechen-Institut Heidelberg: 1,Bibcode:1999VeARI..35....1W.
^abCowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications",Astronomical Journal,74:375–406,Bibcode:1969AJ.....74..375C,doi:10.1086/110819.
^abJohnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars",Communications of the Lunar and Planetary Laboratory,4 (99): 99,Bibcode:1966CoLPL...4...99J.
^abcdPearce, Tim D.; Launhardt, Ralf; Ostermann, Robert; Kennedy, Grant M.; Gennaro, Mario; Booth, Mark; Krivov, Alexander V.; Cugno, Gabriele; Henning, Thomas K.; Quirrenbach, Andreas; Barcucci, Arianna Musso; Matthews, Elisabeth C.; Ruh, Henrik L.; Stone, Jordan M. (2022), "Planet populations inferred from debris discs. Insights from 178 debris systems in the ISPY, LEECH, and LIStEN planet-hunting surveys",Astronomy and Astrophysics,659,arXiv:2201.08369,Bibcode:2022A&A...659A.135P,doi:10.1051/0004-6361/202142720,S2CID246063879.
^Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A.; Matijevic, G.; Monari, G.; Cantat-Gaudin, T.; Weiler, M.; Khan, S.; Miglio, A.; Carrillo, I.; Romero-Gómez, M.; Minchev, I.; de Jong, R. S.; Antoja, T.; Ramos, P.; Steinmetz, M.; Enke, H. (1 August 2019), "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18",Astronomy and Astrophysics,628: A94,arXiv:1904.11302,Bibcode:2019A&A...628A..94A,doi:10.1051/0004-6361/201935765,ISSN0004-6361,S2CID131780028.
^Hirshfeld, A.; et al. (August 1992), "Book-Review - Sky Catalogue 2000.0 - V.1 - Stars to Magnitude 8.0 ED.2",Journal of the Royal Astronomical Society of Canada,86 (4): 221,Bibcode:1992JRASC..86..221L
