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HR 4049, also known as HD 89353 and AG Antliae, is a binary post-asymptotic-giant-branch (post-AGB) star in the constellation Antlia. A very metal-poor star, it is surrounded by a thick unique circumbinary disk enriched in several molecules. With an apparent magnitude of about 5.5, the star can readily be seen under ideal conditions. It is located approximately 1,700 parsecs (5,500 ly) distant.

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  • HR 4049 (en)
  • 唧筒座AG (zh)
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  • 唧筒座AG ,也稱為HD 89353和 HR 4049,是顆位於唧筒座的前漸近巨星分支恆星。一顆非常貧金屬星,它被富含幾種分子的一層厚厚環繞著,視星等5.53等,在理想的條件下隨時都可以用裸眼看見這顆恆星。這顆恆星的距離大約是813秒差距(2,650光年),已經被證實是聯星 ;然而,像許多單獨的特殊恆星一樣,這顆恆星有著獨特的頻譜。這顆恆星基於其巴耳末系的譜線,是顆藍超巨星,實際上它是顆位於前漸近巨星分支階段的老年低質量恆星。這顆恆星正在進行激烈的質量損失,唯一改變的是在5.29和5.83星等間,以429天的週期改變光度。 (zh)
  • HR 4049, also known as HD 89353 and AG Antliae, is a binary post-asymptotic-giant-branch (post-AGB) star in the constellation Antlia. A very metal-poor star, it is surrounded by a thick unique circumbinary disk enriched in several molecules. With an apparent magnitude of about 5.5, the star can readily be seen under ideal conditions. It is located approximately 1,700 parsecs (5,500 ly) distant. (en)
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  • HR 4049 (en)
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  • http://commons.wikimedia.org/wiki/Special:FilePath/HR4049LightCurve.png
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