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Three Galaxies in Draco (NGC 5985, NGC 5982, NGC 5981)


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Three Galaxies in Draco (NGC 5985, NGC 5982, NGC 5981)
りゅう座の3つの銀河


名前
(Name)
分類 明るさ
(Brightness)
別名
(Other names)
NGC 5985 Gx SBb 11.1 PGC 55725, UGC 9969, MCG 10-22-30
NGC 5982 Gx E3 11 PGC 55674, UGC 9961, MCG 10-22-29
NGC 5981 Gx Sc 13.2 PGC 55647, UGC 9948, MCG 10-22-27

星座 (Constellation)
りゅう座 (Dra) (Draco)

距離 (Distance)
1億光年 (100 million light-years)

Three Galaxies in Draco (NGC 5985, NGC 5982, NGC 5981) is an interacting galaxy located 100 million light years from the Earth in the constellation Draco.

Three Galaxies in Draco (NGC 5985, NGC 5982, NGC 5981) : Picture

Three Galaxies in Draco
Three Galaxies in Draco
(C) NASA, 2009
This intriguing trio of galaxies is sometimes called the Draco Group, located in the northern constellation of Draco. From left to right are edge-on spiral NGC 5981, elliptical galaxy NGC 5982, and face-on spiral NGC 5985 -- all within this single telescopic field of view spanning a little more than half the width of the full moon. While the group is far too small to be a galaxy cluster and has not been cataloged compact group, these galaxies all do lie roughly 100 million light-years from planet Earth. On close examination with spectrographs, the bright core of the striking face-on spiral NGC 5985 shows prominent emission in specific wavelengths of light, prompting astronomers to classify it as a Seyfert, a type of active galaxy. Not as well known as other tight groupings of galaxies, the contrast in visual appearance makes this triplet an attractive subject for astrophotographers. This impressively deep exposure of the region also reveals faint and even more distant background galaxies.

NGC5985,NGC5982,NGC5981の画像
Three Galaxies in Draco
(Left/NGC 5985), (Center/NGC 5982), (Right/NGC 5981)
(C) NASA

Three Galaxies in Draco
Three Galaxies in Draco
(C) NASA, 2006
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Three Galaxies in Draco (NGC 5985, NGC 5982, NGC 5981) : Movie

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