Tags: Star.
BD +17° 3248 is an old Population II star located at a distance of roughly 968 light-years (297 parsecs) in the Galactic Halo. It belongs to the class of ultra-metal-poor stars especially the very rare subclass of neutron-capture (r-process) enhanced stars.Since about 2000 this star had been studied with 3 telescopes: a) the Hubble Space Telescope b) the Keck I telescope and c) the Harlan J. Smith Telescope at the McDonald Observatory of the University of Texas.