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天兔座R

天兔座 R

天兔座 R在天兔座中的位置。
觀測資料
曆元 J2000.0
星座 天兔座
星官
赤經 04h 59m 36.3487s[1]
赤緯 −14° 48′ 22.518″[1]
視星等(V) 5.5 to 11.7[2]
特性
光谱分类C7,6e(N6e)[2]
B−V 色指数+5.74[3]
R−I 色指数+1.47[3]
变星类型米拉變星 (長週期變星)[2]
天体测定
徑向速度 (Rv)32.4 ± 2[1] km/s
自行 (μ) 赤经:7.51[1] mas/yr
赤纬:−4.27[1] mas/yr
视差 (π)2.42 ± 1.02[1] mas
距离approx. 1,300 ly
(approx. 400 pc)
绝对星等 (MV)2[4]
詳細資料
質量2 M
半徑490 R
其他命名
R Lep, AAVSO 0455-14, BD−15 915, GC 6093, HD 31996, HIP 23203, HR 1607, IRC -10080, PPM 215123, RAFGL 667, SAO 150058.[1]
參考資料庫
SIMBAD资料

天兔座 R (R Lep),通常被稱為欣德的紅星[5],是位於天兔座鄰近波江座邊界的一顆變星。在右邊的圖中以閃爍的紅圈標示出來[1]

它是一顆碳星,呈現出明顯的紅色。他以英國天文學家約翰·羅素·欣德之名為名,是因為欣德在1845年的觀測使它聲名大噪。它的光度在5.5至11.7等之間變化,週期是418至441天,但是最近的測量得到的週期是427.07天。它可能還有一個長達40年的次要週期[3]

在它的光度最亮時,天兔座 R的顏色經常被認為是會強烈冒煙的紅色,但是這種感受是難以用言語來形容的。當他光度昏暗時,它的顏色會更紅,這個現象以14.5個月的週期反復著。在這時,他很容易成為全天可見顏色最紅恆星的候選人,但這種看法仍有爭議。它之所以如此的紅,可能是外層大氣將可見光光譜中的藍色過濾掉了。這顆恆星的發現者,欣德在報告中說:"看來就像是黑色背景上的一滴血[5]。"

參考資料

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  1. ^ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 V* R Lep -- Variable Star of Mira Cet type, database entry, SIMBAD. Accessed on line November 19, 2009.
  2. ^ 2.0 2.1 2.2 R Lep, database entry, The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars页面存档备份,存于互联网档案馆), Sternberg Astronomical Institute, Moscow, Russia. Accessed on line November 19, 2009.
  3. ^ 3.0 3.1 3.2 HR 1607页面存档备份,存于互联网档案馆), database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50页面存档备份,存于互联网档案馆). Accessed on line November 19, 2009.
  4. ^ From apparent magnitude and parallax.
  5. ^ 5.0 5.1 Allen, Richard Hinckley. Star-names and Their Meanings. G.E. Stechert. 1899: 269 [2022-08-02]. (原始内容存档于2019-06-14) (英语). 

外部連結

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天兔座R
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