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  1. Copilot 答案
    赤经12ʰ 53ᵐ 42ˢ
    赤纬-60° 22.0′
    距离6,400 光年 (1,980 秒差距)
    Discovery and observation

    The Jewel Box as a star cluster was first found by Nicolas Louis de Lacaille while doing astrometric observations for his 1751–1752 southern star catalogue Cœlum Australe Stelliferum at the Cape of Good Hope展开

    Prominent members

    The central part of the cluster is framed by bright stars making up an A-shaped asterism. The upper tip of this asterism is HD 111904 (HR 4887, HIP 62894), a B9 supergiant and suspected variable star. It is the brightest me… 展开

    Physical characteristics

    The Jewel Box cluster is one of the youngest known open clusters. The mean radial velocity of the Jewel Box cluster is −21 kilometres per second (−13 mi/s). The brightest stars in the Jewel Box cluster are supergiants, … 展开

    Observation

    The Jewel Box cluster is regarded as one of the finest objects in the southern sky. It is visible to the naked eye as a hazy object of the fourth magnitude. It can be easily located using the star Beta Crucis as a guide, and appe… 展开