The short-period solar-type contact binary HH Boo was monitored photometrically for about 8 years. It is found that the CCD light curves in the , , , and bands obtained in 2010 are symmetric, while the multicolor light curves observed in 2011 and 2012 by several investigators showed a positive O’Connell effect where the maxima following the primary minima are higher than the other ones. This indicates that the light curve of the solar-type contact binary is variable. By analyzing our multicolor light curves with the Wilson-Devinney code (W-D code), it is confirmed that HH Boo is a W-type shallow-contact binary system with a mass ratio of = 1.703(31) and a degree of contact factor of = . By including 109 new determined times of light minimum together with those compiled from the literature, it is detected that the diagram shows a cyclic oscillation with a period of = 6.58(11) yr and an amplitude of = 0.0018 d. The cyclic change may reveal the presence of an extremely cool third body orbiting the central binary.

中文翻译：

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太阳型浅接触二元HH短靴的新光度研究

用光度法对短周期太阳能型接触式二元HH Boo进行了约8年的监测。据发现，在CCD光曲线， ， ，和在2010年获得的频带是对称的，而由一些研究者在2011年和2012年中观察到的多色光的曲线显示出积极的O'Connell效果，其中在初次最小值最大值较高比其他的 这表明太阳能型触点二进制的光曲线是可变的。通过使用Wilson-Devinney码（WD码）分析我们的多色光曲线，可以确定HH Boo是W型浅接触二元系统，质量比= 1.703（31），接触因子为= 。 通过将109个新确定的最小光时间以及文献中汇编的最小时间包括在内，可以检测到 该图显示了周期振荡= 6.58（11）yr，振幅= 0.0018 d的循环振荡。周期性变化可能显示存在一个极酷的第三体，该第三体绕着中央双星运动。