A1 (star)

Starbox begin
name= A1 Starbox observe
epoch=J2000.0 (ICRS)
constell=Carina
ra=RA|11|15|09.1
dec=DEC|-61|16|17 |
-! style="background-color: #FFFFC0;" colspan="2" | Astrometry
- style="vertical-align: top;"
Spectral type
?
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Apparent magnitude (V)
9.1
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Distance
20.000 Ly
-! style="background-color: #FFFFC0;" colspan="2" | Binary orbit
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Period (P)
3.77 [http://adsabs.harvard.edu/abs/2005A&A...433L..21P A planet-sized transiting star around OGLE-TR-122. Accurate mass and radius near the hydrogen-burning limit] , F. Pont, C. H. F. Melo, F. Bouchy, S. Udry, D. Queloz, M. Mayor, and N. C. Santos, "Astronomy and Astrophysics" 433, #2 (April 11, 2005), pp. L21–L24.] days
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Eccentricity (e)
?
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Inclination (i)
? Starbox detail
mass=84.0 (primary) / 30.0 (b)
radius= (primary) / ? (b)
temperature= ? (primary)

A1 is a massive binary star system located in NGC 3603, about 20,000 light years from Earth. Its two component stars have 114 solar masses and 84 solar masses, and circle each other every 3.77 days. The stars were identified and their masses calculated by a team from the Universite de Montreal.

References

* [http://www.spacedaily.com/reports/A_Team_Of_Astronomers_Identifies_The_Most_Massive_Star_Ever_999.html Space Daily]
* [http://www.skyandtelescope.com/news/20606684.html Sky & Telescope : The Most Massive Star Yet?]
* [http://www.astronomy.com/asy/default.aspx?c=a&id=5620 Astronomy : The Most Massive Star]