QU Normae
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Norma |
| Right ascension | 16h 29m 42.32668s [1] |
| Declination | −46° 14′ 35.6022″ [1] |
| Apparent magnitude (V) | 5.27-5.41[2] |
| Characteristics | |
| Spectral type | B2Iap[1] |
| Astrometry | |
| Radial velocity (Rv) | −14.80 ± 3.2[1] km/s |
| Proper motion (μ) | RA: -4.54[1] mas/yr Dec.: -1.51[1] mas/yr |
| Parallax (π) | 1.79 ± 0.70[3] mas |
| Distance | approx. 1,800 ly (approx. 600 pc) |
| Details | |
| Radius | 5.8[4] R☉ |
| Luminosity | 2164[5] L☉ |
| Other designations | |
QU Normae, also known as HR 6131, is a star in the constellation Norma. Its apparent magnitude varies between 5.27 and 5.41 over a period of 4.818 days.[2] It is a blue-white supergiant of spectral type B2Ia that has swollen and cooled off the main sequence.[1] Around 1820 light-years distant, it shines with a luminosity approximately 2164 times that of the Sun.[5] It has a diameter around 5.8 times that of the Sun.[4]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 SIMBAD, QU Normae (accessed 12 April 2015)
- ↑ 2.0 2.1 Otero, Sebastian Alberto (24 May 2012). "QU Normae". AAVSO Website. American Association of Variable Star Observers. Retrieved 12 April 2015.
- ↑ van Leeuwen, F. (2007). "Validation of the New Hipparcos Reduction". Astronomy and Astrophysics 474 (2): 653–64. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
- ↑ 4.0 4.1 Pasinetti Fracassini, L. E.; Pastori, L.; Covino, S.; Pozzi, A. (2001). "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics". Astronomy & Astrophysics 367: 521–24. Bibcode:2001A&A...367..521P. doi:10.1051/0004-6361:20000451.
- ↑ 5.0 5.1 McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (2012). "Fundamental Parameters and Infrared Excesses of Hipparcos Stars". Monthly Notices of the Royal Astronomical Society 427 (1): 343–57. Bibcode:2012MNRAS.427..343M.
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