HD 140283 [SEP] constellation
HD 140283
HD 140283, informally nicknamed the Methuselah star, is a metal-poor subgiant star about 200 light years away from the Earth in the constellation Libra, specifically toward Ophiuchus. Its apparent magnitude is 7.205. The star's light is somewhat blueshifted as it is moving more toward than away from us and it has been known to astronomers for over a century as a high-velocity star based on its other vectors (proper motion). An early spectroscopic analysis by Chamberlain and Aller revealed it to have a substantially
") yield, that is of elements other than hydrogen and helium from the supernovae of the locally-extinct Population III stars. Some of the latter may be visible in gravitational lensing in looking at deepest images such as the Hubble Ultra-Deep Field (i.e. their brief existence before their turning supernova). Like HD 122563, CS22892-0052, and CD -38 245, HD 140283 has an excesses of oxygen and the alpha elements relative to iron. While the proportions of these elements is much lower in HD 140283 than