T Normae

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T Nor
TNorLightCurve.png
The visual band light curve of T Normae, from AAVSO data [1]
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
T  Normae, CPD−54° 6651, HIP  77058, HD  140041, AAVSO  1536-54
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

  1. ↑ "Download Data". aavso.org. AAVSO. Retrieved 1 October 2021.
  2. 1 2 3 4 5 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.
  3. 1 2 3 Otero, Sebastian Alberto (19 March 2011). "T Normae". AAVSO Website. American Association of Variable Star Observers . Retrieved 21 March 2015.
  4. ↑ 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 .
  5. ↑ Celis s., L. (1986). "UBVRI photometry of red stars". Astrophysical Journal Supplement Series. 60: 879. Bibcode:1986ApJS...60..879C. doi:10.1086/191103.
  6. 1 2 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.
  7. 1 2 3 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.
  8. ↑ 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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