The

Bayer designation A Bayer designation is a stellar designation in which a specific star is identified by a Greek or Latin letter followed by the genitive form of its parent constellation's Latin name. The original list of Bayer designations contained 1,564 stars. ...

Chi Sagittarii (χ Sagittarii) is shared by three

star system A star system or stellar system is a small number of stars that orbit each other, bound by gravitational attraction. A large group of stars bound by gravitation is generally called a '' star cluster'' or '' galaxy'', although, broadly speak ...

s in the

zodiac The zodiac is a belt-shaped region of the sky that extends approximately 8° north or south (as measured in celestial latitude) of the ecliptic, the Sun path, apparent path of the Sun across the celestial sphere over the course of the year. ...

constellation A constellation is an area on the celestial sphere in which a group of visible stars forms Asterism (astronomy), a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object. The origins of the e ...

of Sagittarius. The brightest of these, χ¹ Sagittarii and χ³ Sagittarii, are separated by 0.56° on the sky. The dimmer star χ² Sagittarii is located between them, 0.10° from χ¹, and is too faint to be seen with the naked eye. In 1977, the

Wow! signal The Wow! signal was a strong narrowband radio signal detected on August 15, 1977, by Ohio State University's Big Ear radio telescope in the United States, then used to support the search for extraterrestrial intelligence. The signal appeared ...

came from the direction of these stars. * χ¹ Sagittarii, 47 Sgr, HR 7362 * χ² Sagittarii, 48 Sgr * χ³ Sagittarii, 49 Sgr, HR 7363

Name and etymology

These three χ star, together with φ Sgr, σ Sgr, ζ Sgr and τ Sgr were ''Al Naʽām al Ṣādirah'' (النعم السادرة), the Returning Ostriches. According to the catalogue of stars in the ''Technical Memorandum 33-507 - A Reduced Star Catalog Containing 537 Named Stars'', ''Al Naʽām al Ṣādirah'' or ''Namalsadirah'' was originally the title for four stars: φ Sgr as ''Namalsadirah I'', τ Sgr as ''Namalsadirah II'', χ¹ Sgr as ''Namalsadirah III'' and χ² Sgr as ''Namalsadirah IV'' (except σ Sgr and ζ Sgr). In

Chinese Chinese can refer to: * Something related to China * Chinese people, people of Chinese nationality, citizenship, and/or ethnicity **''Zhonghua minzu'', the supra-ethnic concept of the Chinese nation ** List of ethnic groups in China, people of ...

, (), meaning ''

Dog The dog (''Canis familiaris'' or ''Canis lupus familiaris'') is a domesticated descendant of the wolf. Also called the domestic dog, it is derived from the extinct Pleistocene wolf, and the modern wolf is the dog's nearest living relative. Do ...

'', refers to an asterism consisting of χ¹ Sagittarii and 52 Sagittarii. Consequently, χ¹ Sagittarii itself is known as (, en, the Second Star of Dog.)AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 2 日
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References

{{DEFAULTSORT:Chi Sagittarii Sagittarii, Chi Sagittarius (constellation)