Astronomy:HD 108541
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| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Centaurus[1] |
| Right ascension | 12h 28m 22.46490s[2] |
| Declination | −39° 02′ 28.2168″[2] |
| Apparent magnitude (V) | 5.448[3] |
| Characteristics | |
| Evolutionary stage | main sequence[4] |
| Spectral type | B8/9V[3] |
| B−V color index | −0.08[5] |
| Astrometry | |
| Radial velocity (Rv) | 5.00[6] km/s |
| Proper motion (μ) | RA: −28.01[2] mas/yr Dec.: −13.76[2] mas/yr |
| Parallax (π) | 7.47 ± 0.28[2] mas |
| Distance | 440 ± 20 ly (134 ± 5 pc) |
| Absolute magnitude (MV) | −-0.18[1] |
| Details | |
| Mass | 3.1[4] M☉ |
| Radius | 3.6[7] R☉ |
| Luminosity | 150[4] L☉ |
| Surface gravity (log g) | 3.77[7] cgs |
| Temperature | 10,691[4] K |
| Rotational velocity (v sin i) | 191[4] km/s |
| Age | 253[8] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 108541, also known by its Bayer designation u Centauri is a star located in the constellation Centaurus, It is also known as HR 4748. The apparent magnitude of the star is about 5.4, meaning it is only visible to the naked eye under excellent viewing conditions. Its distance is about 440 light-years (140 parsecs), based on its parallax measured by the Hipparcos astrometry satellite.[2]
The spectral type of HD 108541 is B8/9V, meaning it is a late B-type main sequence star. These types of stars are a few times more massive than the Sun, and have effective temperatures of about 10,000 to 30,000 K. HD 108541 is just over 3 times more massive than the Sun and has a temperature of about 11,000 K.[4]
References
- ↑ 1.0 1.1 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A XHIP record for this object at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V.
- ↑ 3.0 3.1 3.2 "* u Cen". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=%2A+u+Cen.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy and Astrophysics 537: A120. doi:10.1051/0004-6361/201117691. Bibcode: 2012A&A...537A.120Z.
- ↑ 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.
- ↑ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. doi:10.1134/S1063773706110065. Bibcode: 2006AstL...32..759G.
- ↑ 7.0 7.1 Stassun, Keivan G. et al. (2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. Bibcode: 2019AJ....158..138S.
- ↑ Gontcharov, G. A. (2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters 38 (12): 771. doi:10.1134/S1063773712120031. Bibcode: 2012AstL...38..771G.
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