The archival IUE spectra of the late B giant HR 6990 are used to show that the absorption lines undergo large radial velocity variations in 2 spectra taken 4 months and 10 days apart. These large RV variations confirm that HR 6990 is a spectroscopic binary. The detection of strong lines of P ii, Ga ii, Ga iii and Hg ii show that the brightest member of the system, HR 6990 A, is not a normal late B-type giant but a newly discovered Chemically Peculiar star, probably a phosphorus and gallium enriched main sequence star. The two high resolution IUE spectra do not allow us to elucidate the nature of the companion, HR 6990 B.

中文翻译：

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HR 6990是光谱双星的证据，该双星承载化学特有的晚B型恒星

已故B巨人HR 6990的档案IUE光谱用于显示，吸收谱线在相隔4个月和10天的2个光谱中经历了较大的径向速度变化。这些较大的RV变化证实了HR 6990是光谱双光谱仪。对P ii，Ga  ii，Ga  iii和Hg  ii的强线的检测 表明，系统最亮的成员HR 6990 A不是正常的晚期B型巨星，而是新发现的化学奇特星，可能是磷和富含镓的主序星。这两个高分辨率IUE光谱使我们无法阐明同伴HR 6990 B的性质。