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Z Ursae Minoris est une étoile de la const … Z Ursae Minoris est une étoile de la constellation de la Petite Ourse. Cette étoile carbonée de type C est également une rare variable de type R Coronae Borealis, sa variabilité ayant été confirmée en 2006 après une analyse de son spectre. Observée pour la première fois en tant qu'étoile variable en 1934, sa luminosité diminua brutalement de 6 magnitudes en 1992 et elle a été par la suite diagnostiquée comme une étoile de type RCB. Jusqu'alors on pensait qu'il s'agissait d'une variable à longue période (de type Mira). variable à longue période (de type Mira).
, Z Ursae Minoris är en eruptiv variabel av … Z Ursae Minoris är en eruptiv variabel av RCB-typ (RCB) i stjärnbilden Lilla björnen. Det var 1994 som stjärnan började katalogiseras som RCB-variabel. Dessförinnan hade den kategoriserats som Mira-variabel. Stjärnan har magnitud +10,8 och når i förmörkelsefasen ner till +19,0.och når i förmörkelsefasen ner till +19,0.
, 小熊座Z （Z UMi）是一顆碳星和在星座小熊座的一顆北冕座R型變星。 小熊座Z是在1934年發現的變星。由於它是紅色，且變化週期為數百天，因此起初被認為可能是芻藁變星。在1985年發表的一項調查中，發現它是一顆碳星，後來又發現它也缺乏氫。在1992年，它的亮度消退6星等，因此被歸類為北冕座R型變星 。在2006年，對其頻譜進行分析後，它被確認是北冕座R型變星，並且是已知的此型變星中溫度最低的之一。
, Z Ursae Minoris (Z UMi) is a carbon star a … Z Ursae Minoris (Z UMi) is a carbon star and R Coronae Borealis variable in the constellation Ursa Minor. Z Ursae Minoris was discovered to be a variable star in 1934. It was catalogued as a probable Mira variable, due to its red colour and variations over several hundred days. It was discovered to be a carbon star in a survey published in 1985, and subsequently found also to be hydrogen-deficient. After fading by almost six magnitudes in 1992, it was classified as an R Coronae Borealis variable. It was confirmed as an R Coronae Borealis variable, one of the coolest in the class, after its spectrum was analysed in 2006., after its spectrum was analysed in 2006.
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| rdfs:comment |
Z Ursae Minoris (Z UMi) is a carbon star a … Z Ursae Minoris (Z UMi) is a carbon star and R Coronae Borealis variable in the constellation Ursa Minor. Z Ursae Minoris was discovered to be a variable star in 1934. It was catalogued as a probable Mira variable, due to its red colour and variations over several hundred days. It was discovered to be a carbon star in a survey published in 1985, and subsequently found also to be hydrogen-deficient. After fading by almost six magnitudes in 1992, it was classified as an R Coronae Borealis variable. It was confirmed as an R Coronae Borealis variable, one of the coolest in the class, after its spectrum was analysed in 2006., after its spectrum was analysed in 2006.
, Z Ursae Minoris est une étoile de la const … Z Ursae Minoris est une étoile de la constellation de la Petite Ourse. Cette étoile carbonée de type C est également une rare variable de type R Coronae Borealis, sa variabilité ayant été confirmée en 2006 après une analyse de son spectre. Observée pour la première fois en tant qu'étoile variable en 1934, sa luminosité diminua brutalement de 6 magnitudes en 1992 et elle a été par la suite diagnostiquée comme une étoile de type RCB. Jusqu'alors on pensait qu'il s'agissait d'une variable à longue période (de type Mira). variable à longue période (de type Mira).
, 小熊座Z （Z UMi）是一顆碳星和在星座小熊座的一顆北冕座R型變星。 小熊座Z是在1934年發現的變星。由於它是紅色，且變化週期為數百天，因此起初被認為可能是芻藁變星。在1985年發表的一項調查中，發現它是一顆碳星，後來又發現它也缺乏氫。在1992年，它的亮度消退6星等，因此被歸類為北冕座R型變星 。在2006年，對其頻譜進行分析後，它被確認是北冕座R型變星，並且是已知的此型變星中溫度最低的之一。
, Z Ursae Minoris är en eruptiv variabel av … Z Ursae Minoris är en eruptiv variabel av RCB-typ (RCB) i stjärnbilden Lilla björnen. Det var 1994 som stjärnan började katalogiseras som RCB-variabel. Dessförinnan hade den kategoriserats som Mira-variabel. Stjärnan har magnitud +10,8 och når i förmörkelsefasen ner till +19,0.och når i förmörkelsefasen ner till +19,0.
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小熊座Z
, Z Ursae Minoris
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