双星团（也称为科德韦尔14）是裸眼可见的疏散星团 NGC 869和 NGC 884（经常被错误的称为英仙座h和κ，其实h是邻近的一颗恒星，而κ就是这两个星团）的合称，在英仙座内靠得很近。NGC 869和NGC 884 两者至地球的距离都是7,600光年。NGC 869的质量约为3,700太阳质量，而NGC 884的质量大约是2,800太阳质量；然而后来的研究显示这两个星团有很多的晕星环绕着，所以它们的总质量至少是20,000太阳质量。依据对个别恒星的研究，这两个星团相对来说都很年轻，大约都只有1,280万岁。相较之下，昴宿星团的年龄估计是7,500万至15,000万岁。这两个星团各自都有300颗以上的蓝白色超巨星。这两个星团都有蓝移，NGC 869以39 km/s（24 mi/s）接近地球，NGC 884也以相似的速度，38 km/s（24 mi/s）朝向地球接近。星团中最热主序星的光谱类型是B0。

The Double Cluster (also known as Caldwell 14) is the common name for the naked-eye open clusters NGC 869 and NGC 884 (often designated h Persei and χ Persei, respectively), which are close together in the constellation Perseus. NGC 869 and NGC 884 both lie at a distance of 7500 light years. NGC 869 has a mass of 3700 solar masses and NGC 884 weighs in at 2800 solar masses; however, later research has shown both clusters are surrounded with a very extensive halo of stars, with a total mass for the complex of at least 20,000 solar masses. Based on their individual stars, the clusters are relatively young, both 12.8 million years old. In comparison, the Pleiades have an estimated age ranging from 75 million years to 150 million years. There are more than 300 blue-white super-giant stars in each of the clusters. The clusters are also blueshifted, with NGC 869 approaching Earth at a speed of 39 km/s (24 mi/s) and NGC 884 approaching at a similar speed of 38 km/s (24 mi/s). Their hottest main sequence stars are of spectral type B0.