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HD 108541

From Wikipedia, the free encyclopedia
Star in the constellation Centaurus
This article is about u Centauri. Not to be confused withυ Centauri.
HD 108541 (u Centauri)
Observation data
EpochJ2000      EquinoxJ2000
ConstellationCentaurus
Right ascension12h 28m 22.46490s[1]
Declination−39° 02′ 28.2168″[1]
Apparent magnitude (V)5.448[2]
Characteristics
Spectral typeB8/9V[2]
B−Vcolor index-0.08[3]
Astrometry
Radial velocity (Rv)5.00[4] km/s
Proper motion (μ)RA: -28.01[1]mas/yr
Dec.: -13.76[1]mas/yr
Parallax (π)7.47±0.28 mas[1]
Distance440 ± 20 ly
(134 ± 5 pc)
Absolute magnitude (MV)0.28[5]
Details
Mass2.9[5] M
Luminosity265[6] L
Temperature10990[5] K
Age0.174[5] Gyr
Other designations
u Cen,CD–34° 7753,HD 108541,HIP 60855,SAO 203508,HR 4748,GC 17001[2]
Database references
SIMBADdata

HD 108541, also known by itsBayer designationu Centauri is astar located in theconstellationCentaurus, It is also known asHR 4748. Theapparent magnitude of thestar is about 5.4, meaning it is only visible to the naked eye underexcellent viewing conditions. Its distance is about 440light-years (140parsecs), based on itsparallax measured by theHipparcosastrometry satellite.[1] Thespectral type of HD 108541 is B8/9V, meaning it is a lateB-type main sequence star. These types of stars are a few times more massive than theSun, and haveeffective temperatures of about 10,000 to 30,000K. HD 108541 is just under 3 times more massive than the Sun[5] and has a temperature of about 11,000 K.[5]

References

[edit]
  1. ^abcdefvan Leeuwen, F. (2007)."Validation of the new Hipparcos reduction".Astronomy and Astrophysics.474 (2):653–664.arXiv:0708.1752.Bibcode:2007A&A...474..653V.doi:10.1051/0004-6361:20078357.S2CID 18759600.
  2. ^abc"* u Cen".SIMBAD.Centre de données astronomiques de Strasbourg. Retrieved8 February 2017.
  3. ^Corben, P. M. (1966). "Photoelectric magnitudes and colours for bright southern stars".Monthly Notes of the Astron. Soc. Southern Africa.25: 44.Bibcode:1966MNSSA..25...44C.
  4. ^Gontcharov, G. A. (2006)."Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system".Astronomy Letters.32 (11):759–771.arXiv:1606.08053.Bibcode:2006AstL...32..759G.doi:10.1134/S1063773706110065.S2CID 119231169.
  5. ^abcdefGrosbol, P. J. (1978). "Space velocities and ages of nearby early-type stars".Astronomy and Astrophysics Supplement Series.32:409–421.Bibcode:1978A&AS...32..409G.
  6. ^de Vaucouleurs, A. (1957)."Spectral types and luminosities of B, A and F southern stars".Monthly Notices of the Royal Astronomical Society.117 (4): 449.Bibcode:1957MNRAS.117..449D.doi:10.1093/mnras/117.4.449.
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