T Normae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Norma |
| Right ascension | 15h 44m 03.83966s[2] |
| Declination | −54° 59′ 12.5184″[2] |
| Apparent magnitude (V) | 6.2-13.6[3] |
| Characteristics | |
| Spectral type | M3e-M6e[3] (-M9[4]) |
| U−B color index | +0.76 - +1.09[5] |
| B−V color index | +1.42 - +1.87 |
| Variable type | Mira |
| Astrometry | |
| Proper motion (μ) | RA: −10.02[2] mas/yr Dec.: −11.55[2] mas/yr |
| Parallax (π) | 3.61 ± 1.25 mas[2] |
| Distance | 500[6] pc |
| Absolute magnitude (MV) | −1.01 - 3.63[6] |
| Details | |
| Luminosity | 760[7] L☉ |
| Temperature | 3,234 K[7] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
T Normae is a Mira variable star. It is located midway between Eta Normae and Gamma Circini.[8] It ranges from magnitude 6.2 to 13.6 and a period of 244 days.[3] 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.[7]
References
[edit]- ^ "Download Data". aavso.org. AAVSO. Retrieved 1 October 2021.
- ^ a b c d e 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. S2CID 18759600.
- ^ a b c Otero, Sebastian Alberto (19 March 2011). "T Normae". AAVSO Website. American Association of Variable Star Observers. Retrieved 21 March 2015.
- ^ Crowe, Richard A.; Garrison, Robert F. (1988). "The visible spectra of Southern Hemisphere Mira variable stars". Astrophysical Journal Supplement Series. 66: 69. Bibcode:1988ApJS...66...69C. doi:10.1086/191247.
- ^ Celis s., L. (1986). "UBVRI photometry of red stars". Astrophysical Journal Supplement Series. 60: 879. Bibcode:1986ApJS...60..879C. doi:10.1086/191103.
- ^ a b Celis, L. (1995). "Lumnosity attenuation and distances of red giant stars". Astrophysical Journal Supplement Series. 98: 701. Bibcode:1995ApJS...98..701C. doi:10.1086/192175.
- ^ a b c 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. arXiv:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. S2CID 118665352.
- ^ Arnold, H.J.P.; Doherty, Paul; Moore, Patrick (1999). The Photographic Atlas of the Stars. Boca Raton, Florida: CRC Press. p. 176. ISBN 978-0-7503-0654-6.
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