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・ NGC 3808B
・ NGC 381
・ NGC 383
・ NGC 3842
・ NGC 3877
・ NGC 39
・ NGC 3918
・ NGC 3938
・ NGC 3949
・ NGC 3953
・ NGC 3982
・ NGC 4
・ NGC 40
・ NGC 4013
・ NGC 4027
NGC 4030
・ NGC 4036
・ NGC 4038 Group
・ NGC 404
・ NGC 4041
・ NGC 4051
・ NGC 406
・ NGC 4088
・ NGC 41
・ NGC 4102
・ NGC 4121
・ NGC 4125
・ NGC 4145
・ NGC 4151
・ NGC 4183


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NGC 4030 : ウィキペディア英語版
NGC 4030

NGC 4030 is a grand design spiral galaxy〔 located about 64〔 million light years away in the constellation Virgo. With an apparent visual magnitude of 10.6, it is visible with a small telescope as a 3 arc minute wide feature about 4.75° to the southeast of the star Beta Virginis.〔 It is inclined by an angle of 47.1°〔 to the line of sight from the Earth and is receding at a velocity of 1,465 km/s.〔
The morphological classification of NGC 4030 in the De Vaucouleurs system is SA(s)bc,〔 which indicates a spiral structure (SA) with no bar (s) and moderate to loosely wound arms (bc).〔 The inner part of the galaxy shows a complex structure with multiple spiral arms, which becomes a symmetric, double arm pattern beyond 49″ from the core.〔 The central bulge is relatively young with an estimated age of two billion years,〔 while the nucleus is inactive.〔
In 2007, a supernova explosion was discovered in the galaxy from images taken on February 19 from the 1 m Swope telescope at Las Campanas Observatory in Chile. Designated SN 2007aa, it was a type IIP〔 supernova positioned 68″.5 north and 60″.8 east of the galactic nucleus.〔 The progenitor was a red giant star with 8.5–16.5 times the mass of the Sun.〔
==References==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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