Tags: Star.
Atlas is a triple star system in the Pleiades open cluster (M45). It is also known as 27 Tauri.The primary component Atlas A is a blue-white B-type giant with an apparent magnitude of +3.62. It is a spectroscopic binary whose components have magnitudes of +4.1 and +5.6. The binary makes one orbit every 1250 days. Atlas also has a dimmer magnitude +6.8 companion Atlas B at a separation of 0.4 arcseconds or at least 52 astronomical units away.
