Westerlund 2: Difference between revisions
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{{Refimprove|date=July 2007}} |
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{{Starbox begin |
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| name=WR 20a }} |
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{{Starbox observe |
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| epoch=J2000 |
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| ra=10h 23m 58.02s |
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| dec=-57° 45' 48.9"' |
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| appmag_v=15.0 |
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| constell=[[Carina]] }} |
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{{Starbox character |
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| class=WN |
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| b-v=? |
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| u-b=? |
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| variable=None }} |
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{{Starbox astrometry |
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| radial_v=0.0 |
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| prop_mo_ra=0.0 |
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| prop_mo_dec=0.0 |
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| parallax=0.0 |
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| p_error=0.0 |
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| absmag_v=13.5 }} |
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{{Starbox detail |
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| mass=? |
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| radius=? |
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| luminosity=? |
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| temperature=? |
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| metal=? |
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| rotation=? |
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| age=? }} |
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{{Starbox catalog |
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| names= [[GEN#]] +4.38020004, [[THA]] 35-II-36, Cl* Westerlund 2, MSP 240, [[2MASS]] J10235800-5745489, [[UBV M]] 40466, Cl Westerlund 2 4. }} |
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{{Starbox end}} |
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'''WR20a''' is a [[binary star]] system located 20,000 [[light-years]] from the earth towards the southern [[constellation]] [[Carina (constellation)|Carina]]. Each star in the system has eighty times the [[mass]] of our [[sun]]. It is believed that the stars in Westerlund 2 are more typical of the stars that populated the [[Timeline of the Big Bang|early universe]]. It was discovered by a team led by Krzysztof Stanek of [[Harvard University]] using the [[Las Campanas Observatory]] in [[Chile]]. |
'''WR20a''' is a [[binary star]] system located 20,000 [[light-years]] from the earth towards the southern [[constellation]] [[Carina (constellation)|Carina]]. Each star in the system has eighty times the [[mass]] of our [[sun]]. It is believed that the stars in Westerlund 2 are more typical of the stars that populated the [[Timeline of the Big Bang|early universe]]. It was discovered by a team led by Krzysztof Stanek of [[Harvard University]] using the [[Las Campanas Observatory]] in [[Chile]]. |
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==Reference== |
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* [[http://simbad.u-strasbg.fr/simbad/sim-id?protocol=html&Ident=WR20a&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id Simbad]] |
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| ⚫ | |||
[[Categore:Carina constellation]] |
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{{star-stub}} |
{{star-stub}} |
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[[fr:Westerlund 2]] |
[[fr:Westerlund 2]] |
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[[sk:Westerlund 2]] |
[[sk:Westerlund 2]] |
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[[pt:Westerlund 2]] |
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Revision as of 05:33, 28 January 2008
 | This article needs additional citations for verification. (July 2007) |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Carina |
| Right ascension | 10h 23m 58.02s |
| Declination | -57° 45' 48.9"' |
| Apparent magnitude (V) | 15.0 |
| Characteristics | |
| Spectral type | WN |
| U−B color index | ? |
| B−V color index | ? |
| Variable type | None |
| Astrometry | |
| Radial velocity (Rv) | 0.0 km/s |
| Proper motion (μ) | RA: 0.0 mas/yr Dec.: 0.0 mas/yr |
| Parallax (π) | 0.0 ± 0.0 mas |
| Absolute magnitude (MV) | 13.5 |
| Details | |
| Mass | ? M☉ |
| Radius | ? R☉ |
| Luminosity | ? L☉ |
| Temperature | ? K |
| Metallicity | ? |
| Rotation | ? |
| Age | ? years |
| Other designations | |
WR20a is a binary star system located 20,000 light-years from the earth towards the southern constellation Carina. Each star in the system has eighty times the mass of our sun. It is believed that the stars in Westerlund 2 are more typical of the stars that populated the early universe. It was discovered by a team led by Krzysztof Stanek of Harvard University using the Las Campanas Observatory in Chile.
Reference
- [Simbad]
 | This star-related article is a stub. You can help Wikipedia by expanding it. |