Rho Aquilae, ρ Aquilae, is the Bayer designation for a star in the northern constellation of Delphinus. It has an apparent visual magnitude of 4.94 and is bright enough to be seen with the naked eye in good conditions.
Distance, proper motion and constellation The annual parallax shift is 21.75 milliarcseconds, which corresponds to a distance of the star of around from Earth. Relatively high proper motion resulted in the star crossing the border from Aquila into Delphinus in 1992. Rho Aquilae is therefore a rare occurrence of a mismatch between current constellation and Bayer designation constellation. The star is in the low-northern constellation of Delphinus therefore at least seasonally visible to all but the high southern latitudes. It is currently moving closer to the Sun.
Chinese constellations and components R. H. Allen's 1899 book Star Names claimed the traditional name Tso Ke for this star, from the Cantonese 左旗 jo keih meaning "the left flag". In Chinese, ( in Mandarin), within the Ox lunar mansion, refers to an asterism consisting of this star, α, β, γ, δ, ζ, 11, 13, and 14 Sagittae stars of Sagitta to the west. 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, . Consequently, ρ Aquilae itself is known as (, ). AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 3 日 The IAU Working Group on Star Names assigned the name Zuoqi to δ Sagittae A in 2026.
Physical characteristics Rho Aquilae is an A-type main sequence star with a stellar classification of A2 V. This star is about 400 million years old and it displays an excess emission of infrared radiation that may be explained by a circumstellar disk of dust.
References
External links Simbad Image HR 7724