Omega2 Scorpii
Template:Starbox begin Template:Starbox observe Template:Starbox character Template:Starbox astrometry Template:Starbox detail Template:Starbox catalog Template:Starbox reference Template:Starbox end
ω2 Scorpii, Latinised as Omega2 Scorpii, is a suspected[1] variable star in the zodiac constellation of Scorpius. A component of the visual double star ω Scorpii, it is bright enough to be seen with the naked eye having an apparent visual magnitude of +4.320.[2] The distance to this star, as determined using parallax measurements,[3] is around 291 light years. The visual magnitude of this star is reduced by 0.38 because of extinction from interstellar dust.[4]
It is 0.05 degree north of the ecliptic, so can be occulted by the moon and planets.
This is a G-type giant star with a stellar classification of G6/8III.[5] With an estimated age of 282 million years,[4] it is an evolved, thin disk star that is currently on the red horizontal branch.[6] The interferometry-measured angular diameter of this star is Template:Nowrap,[7] which, at its estimated distance, equates to a physical radius of nearly 16 times the radius of the Sun.[8] It has 3.27 times the mass of the Sun,[4] and radiates 141 times the Sun's luminosity[9] The effective temperature of the star's outer atmosphere is 5,363 K.[10]
Names
In the Cook Islands, a traditional story is told of twins who flee their parents into the sky and become the pair of stars Omega2 and Omega1 Scorpii. The girl, who is called Piri-ere-ua "Inseparable", keeps tight hold of her brother, who is not named.[11] (The IAU used a version of this story from Tahiti to name Mu2 Scorpii.)
References
External links
- ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedSterken1977 - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedKozok1985 - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedvanLeeuwen2007 - ↑ 4.0 4.1 4.2 Cite error: Invalid
<ref>tag; no text was provided for refs namedTakeda2008 - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedhouk1988 - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedAfsar2012 - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedRichichi2002 - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedlang2006 - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedMcdonald2012 - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedprugniel2011 - ↑ Johannes Carl Andersen (1931) Myths and Legends of the Polynesians. 1995 Dover reprint, p.399–400.