HD 100546 or KR Muscae is a star. It is a pre-main-sequence star. It is 361.4 light-years away from the Earth. In the night sky, it is in the constellation of Musca. It has one planet. The plant is 6.5 AU away from HD 100546. The star has a disks of dust and rocks around it. One of these disk is 0.2 to 4 AU from the star and another is 13 AU out to a few hundred AU. Scientists think there might be a protoplanet between these two circumstellar disks, around 47 AU from the star.