T Normae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Norma |
| Right ascension | 15h 44m 03.83966s [1] |
| Declination | -54° 59' 12.5184"'[1] |
| Apparent magnitude (V) | 6.2-13.6[2] |
| Characteristics | |
| Spectral type | M3e-M6e[2] |
| U−B color index | ? |
| B−V color index | ? |
| Variable type | Mira |
| Astrometry | |
| Proper motion (μ) | RA: - mas/yr Dec.: mas/yr |
| Parallax (π) | 3.61 ± 1.25[3] mas |
| Distance | approx. 900 ly (approx. 280 pc) |
| Details | |
| Mass | ? M☉ |
| Radius | ? R☉ |
| Luminosity | 760[4] L☉ |
| Temperature | 3234 K[4] K |
| Metallicity | ? |
| Rotation | ? |
| Age | ? years |
| Other designations | |
V* T Normae, HIP 77058, HD 140041 | |
T Normae is a Mira variable star. It is located midway between Eta Normae and Gamma Circini.[5] It ranges from magnitude 6.2 to 13.6 and a period of 244 days.[2] Located around 900 light-years distant, it shines with a luminosity 760 times that of the Sun and has a surface temperature of 3234 K.[4]
References
- ↑ 1.0 1.1 "V* T Normae -- Variable Star of Mira Ceti type". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 24 March 2015.
- ↑ 2.0 2.1 2.2 Otero, Sebastian Alberto (19 March 2011). "T Normae". AAVSO Website. American Association of Variable Star Observers. Retrieved 21 March 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 4.2 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.
- ↑ Arnold, H.J.P; Doherty, Paul; Moore, Patrick (1999). The Photographic Atlas of the Stars. Boca Raton, Florida: CRC Press. p. 176. ISBN 9780750306546.
| ||||||||||||||||||||||||||