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冬季大三角

红色 = 冬季大三角,蓝色 = 冬季六边形(大椭圆)。

冬季大三角是由大犬座天狼星 Sirius(α CMa)、小犬座南河三 Procyon(α CMi)及猎户参宿四 Betelgeuse(α Ori)所形成的三角形。

冬季大三角观察法

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这三颗星所形成的三角形位于天球的赤道上,所以世界各地都可以看见。如果不好找,可以先找到猎户座的三颗排成一直线的腰带星,再往左上方找到猎户肩膀处的参宿四;再向左方(东边)找一颗很亮的星南河三,利用类似的距离就可以找出也是天空中亮度非常高的天狼星

冬季大三角成员

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中文正称 中文俗称 英语俗称 拜耳命名法 所在星座 星等 太阳光度 光谱型 距离(光年
南河三 南河三 Procyon α CMi 小犬座 0.34 7.73 F5 IV-V/DA 11.4 ± 0.03
参宿四 参宿四 Betelgeuse α Ori 猎户座 0.58 (0.3 – 1.2) 63,000 M2Iab 约 600
天狼星 天狼星 Sirius α CMa 大犬座 −1.47 (A) 25.4(A) A1V (A) 8.6 ± 0.04

参见

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外部链接

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冬季大三角
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