HE1327- 2326

Information about HE1327- 2326

HE1327-2326
Observation data
Epoch J2000
ConstellationHydra
Right ascension13h 30m 06s
Declination-23° 41' 54"
Apparent magnitude (V)13.5
HE1327-2326, discovered in 2005, is the star with the lowest known iron abundance to date. The star is a member of Population II, with an iron to hydrogen ratio ([Fe/H]), or metallicity, of -5.6. This number indicates that its iron content is 300,000 times less than 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 be produced 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's been speculated that this star is part of the second generation, born out of the gas clouds which were polluted by the primordial Population III stars.

See also

References

  • FREBEL A., AOKI W., CHRISTLIEB N., ANDO H., ASPLUND M., BARKLEM P.S., BEERS T.C., ERIKSSON K., FECHNER C., FUJIMOTO M.Y., HONDA S., KAJINO T., MINEZAKI T., NOMOTO K., NORRIS J.E., RYAN S.G., TAKADA-HIDAI M., TSANGARIDES S., YOSHII Y., Nucleosynthetic signatures of the first stars, Nature, 434, 871-873 (2005)

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constellation of Orion is the area outlined in the dashed yellow line. Orion contains a striking and well-known star pattern that has the form of a hunter.]] A constellation is any one of the 88 areas into which the sky — or the celestial sphere — is divided.
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Hydra

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List of stars in Hydra
Abbreviation: Hya
Genitive: Hydrae
Symbology: the sea serpent
Right ascension: 10 h
Declination: −20
Area: 1303 sq. deg.
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Right ascension (abbrev. RA; symbol α) is the astronomical term for one of the two coordinates of a point on the celestial sphere when using the equatorial coordinate system. The other coordinate is the declination.
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In astronomy, declination (abbrev. dec or δ) is one of the two coordinates of the equatorial coordinate system, the other being either right ascension or hour angle.
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The apparent magnitude (m) of a celestial body is a measure of its brightness as seen by an observer on Earth, normalized to the value it would have in the absence of the atmosphere.
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20th century - 21st century - 22nd century
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2002 2003 2004 - 2005 - 2006 2007 2008

2005 by topic:
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metallicity of an object is the proportion of its matter made up of chemical elements other than hydrogen and helium. (This terminology is used differently to the usual meaning of the word 'metal', since on the grandest of scales the universe is overwhelmingly composed of hydrogen
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3, 4, 6
(amphoteric oxide)
Electronegativity 1.83 (Pauling scale)
Ionization energies
(more) 1st: 762.5 kJmol−1
2nd: 1561.9 kJmol−1
3rd: 2957 kJmol−1

Atomic radius 140 pm
Atomic radius (calc.
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EARTH was a short-lived Japanese vocal trio which released 6 singles and 1 album between 2000 and 2001. Their greatest hit, their debut single "time after time", peaked at #13 in the Oricon singles chart.
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The Sun

Observation data
Mean distance
from Earth 1.4961011 m
(8.31 min at light speed)
Visual brightness (V) −26.74m [1]
Absolute magnitude 4.
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The Universe is defined as the summation of all particles and energy that exist and the space-time in which all events occur. Based on observations of the portion of the Universe that is observable, physicists attempt to describe the whole of space-time, including all matter and
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HE0107-5240 is a newly discovered giant star roughly 36,000 light years away from Earth and 80% the mass of the Sun.

It is largely metal-free, having just 1/200,000 of the metal that the Sun has.
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The word Simbad can refer to one of the following:
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