From BRAVE AI:
HD 140283
metal-poor subgiant star
The Methuselah star, officially designated as HD 140283, is a metal-poor subgiant star located approximately 200.5 light-years away from Earth in the constellation Libra. Here are some key facts about this ancient star:
Age:
Initially estimated to be around 14.46 billion years old, making it older than the universe’s estimated age of 13.77 billion years. However, more recent models of its stellar evolution have revised its age to around 12 billion years, which is still remarkably old.
Metallicity:
The star has very low metallicity, indicating it likely formed from the remnants of the first generation of stars, which would have formed early in the universe’s history.
Spectral Type:
sdF3, classified as a chemically peculiar star.
Apparent Magnitude:
7.205, making it visible with binoculars.
Distance:
200.5 light-years from Earth.
Constellation:
Libra, near the boundary with Ophiuchus.
Proper Motion:
-1114.93000 ± 0.68000 milliarcseconds/year (right ascension) and -304.36000 ± 0.46000 milliarcseconds/year (declination).
The Methuselah star is one of the oldest known stars in the Milky Way galaxy, providing valuable insights into the early formation and evolution of our galaxy. Its age and metallicity make it a unique object of study for astronomers, offering a glimpse into the distant past of our cosmic neighborhood.
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