# HE 1327-2326

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HE1327-2326, discovered in 2005 by Anna Frebel and collaborators,[2] was the star with the lowest known iron abundance until SMSS J031300.36-670839.3 was discovered.[3] The star is a member of Population II stars, with a solar-standardised iron to hydrogen index (Fe:H), or metallicity, of −5.6. The scale being logarithmic, this number indicates that its iron content is 1/400,000 that of the Earth's sun. However, it has a carbon abundance of roughly one-tenth solar ([C/H] = −1.0), and it is not known how these two abundances can have been produced/exist simultaneously. Discovered by the Hamburg/ESO survey for metal-poor stars, it was probably formed during an age of the universe when the metal content was much lower. It has been speculated[by whom?] that this star is part of the second generation, born out of the gas clouds which were imbued with elements such as carbon by the primordial Population III stars.

HE1327-2326
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Hydra
Right ascension  13h 30m 06s[1]
Declination −23° 41′ 54″[1]
13.5
Astrometry
Distance4000 ly
Details
Mass0.8 M
Metallicity${\displaystyle {\begin{smallmatrix}\left[{\ce {Fe}}/{\ce {H}}\right]\end{smallmatrix}}}$ = −5.6
Other designations
HE 1327-2326, SPM3.2 4266486.
Database references