T Nor

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]
Distance500[6] pc
Absolute magnitude (MV)−1.01 - 3.63[6]
Details
Luminosity760[7] L☉
Temperature3,234 K[7] K
Other designations
T Normae, CPD−54° 6651, HIP 77058, HD 140041, AAVSO 1536-54
Database references
SIMBADdata

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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