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IC 2602 (Southern Pleiades)


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IC 2602
Southern Pleiades (南天のプレアデス)
Open Cluster (散開星団)
OC II3m


別名 (Other names)
OCL 838, ESO 93-SC2, Caldwell 102, Theta Car Cluster, Mel 102

明るさ (Brightness)
1.9等級

星座 (Constellation)

りゅうこつ座 (Car) (Carina)

距離 (Distance)
480光年 (480 light-years)

IC 2602 (Caldwell 102)は、りゅうこつ座の散開星団。南天のプレアデスとしても知られている。
1751年南アフリカでニコラ・ルイ・ド・ラカーユによって発見された。地球から479光年離れており、肉眼で見ることができる。この星団全体の視等級は1.9で、おうし座のプレアデス星団の70%の明るさである。星団は約60の星で含んでいる。りゅうこつ座θ星は、星団の中で最も明るい3等星。星団内の他の星は5等星以下。
プレアデス星団のように、この星団は広がって見えるため、大きい双眼鏡や広角のアイピースを用いた望遠鏡で観察しやすい。この星団は、散開星団IC 2391と同じ年齢だと推定されている。(lithium depletion boundaryにより5,000万歳とされている)。

IC 2602 (Southern Pleiades) is an open cluster located 480 light years from the Earth in the constellation Carina.

IC 2602 (Southern Pleiades) : Picture

IC 2602 (Southern Pleiades)
IC 2602 (Southern Pleiades)
(C) Roberto Mura
IC 2602, also known as the Theta Carinae Cluster or Southern Pleiades, is an open cluster in the constellation Carina. It was discovered by Abbe Lacaille in 1751 from South Africa. The cluster is at a distance of about 479 light-years away from Earth and can be seen with the naked eye. The Southern Pleiades (IC 2602) has an overall apparent magnitude of 1.9, which is 70% fainter than the Taurean Pleiades, and contains about 60 stars. Theta Carinae, the brightest star within the open cluster, is a third-magnitude star with an apparent magnitude of +2.74. All the other stars within the cluster are of the fifth magnitude and fainter. Like its northern counterpart in Taurus, the Southern Pleiades spans a sizeable area of sky, approximately 50 arcminutes, so it is best viewed with large binoculars or telescope with a wide-angle eyepiece. The cluster is thought to have the same age as the open cluster IC 2391, which has a lithium depletion boundary age of 50 million years old.

IC 2602 (Southern Pleiades)
IC 2602 (Southern Pleiades)
(C) www.pbase.com/takman2

IC 2602 (Southern Pleiades)
IC 2602 (Southern Pleiades)
(C) www.skyandtelescope.com

IC 2602 (Southern Pleiades) IC 2602 (Southern Pleiades)
IC 2602 (Southern Pleiades)
(C) Roberto Mura
IC 2602 (Southern Pleiades)
(C) www.pbase.com
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「ウィキペディア(wikipedia):フリー百科事典」より文章引用。
IC 2602. (2013, May 21). In Wikipedia.
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