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・ NGC 6539
・ NGC 6541
・ NGC 6559
・ NGC 6560
・ NGC 6565
・ NGC 6566
・ NGC 6570
・ NGC 6572
・ NGC 6578
・ NGC 6584
・ NGC 659
・ NGC 66
・ NGC 660
・ NGC 6603
・ NGC 6604
NGC 6624
・ NGC 663
・ NGC 6633
・ NGC 6642
・ NGC 67
・ NGC 6709
・ NGC 6712
・ NGC 6723
・ NGC 6729
・ NGC 6738
・ NGC 6741
・ NGC 6744
・ NGC 6745
・ NGC 6751
・ NGC 6752


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NGC 6624 : ウィキペディア英語版
NGC 6624

NGC 6624 is a globular cluster in the constellation Sagittarius. It was discovered on 24 June 1784 by the astronomer William Herschel. It has an apparent magnitude of 7.6.〔

Six pulsars are known in NGC 6624. The first of these to be discovered was PSR J1823-3021A. This globular cluster also contains 4U 1820-30, a low-mass X-ray binary with an orbital period of only 11.5 minutes.
NGC 6624 is visible as a hazy spot with a small telescope, and appears as a star-like object with binoculars. Its core appears significantly condensed.〔 It is located 0.8 degrees southeast of the star Delta Sagittarii, and is about from the Galactic center.〔

==References==



抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「NGC 6624」の詳細全文を読む



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