The brightest supernova "SN 1987A" in the large Magellanic galaxy located at the edge of the bird spider galaxy was observed to explode on February 23, 1987. Since then, it has continuously ejected a series of ring structures, and the outermost ring can be clearly observed in the photo. On the left side of the photo, you can see this amazing structure: honeycomb clusters.

This cluster is located in a haunted house, so it is also called a ghost cluster. The size of the hive cluster is less than 10 parsec, with more than 200 member stars and a total mass of more than 200 solar masses. Its center is about 160 parsec from the sun, which is much farther than the Bi cluster. Honeycomb cluster is a moving cluster, which is moving away from the earth, and its speed and direction are similar to those of Bixing cluster. M44 also contains a unique blue star. Among its member stars, there are eclipsing binary star-Cancer TX, a star with metal absorption line-Cancer ε, and several 7~8 shield delta variables, all of which are in the early stage of post-main sequence.

Honeycomb clusters are classified as I, 2, R, II, 2, M and G by trumpler (according to KennethGlynJones). Tz classifies them into type II, type II and type R. As mentioned in the description of Orion Nebula M42, it is unusual for messier to add honeycomb clusters (together with Orion Nebula M42/M43 and Pleiades Cluster M45) to his catalog, and the reason may still be worth considering.