T Normae

T Nor

Observation data Epoch J2000      Equinox J2000
Constellation	Norma
Right ascension	15^h 44^m 03.83966^s[1]
Declination	−54° 59′ 12.5184″[1]
Apparent magnitude (V)	6.2-13.6[2]
Characteristics
Spectral type	M3e-M6e[2] (-M9[3])
U−B color index	+0.76 - +1.09[4]
B−V color index	+1.42 - +1.87
Variable type	Mira
Astrometry
Proper motion (μ)	RA: −10.02[1] mas/yr Dec.: −11.55[1] mas/yr
Parallax (π)	3.61 ± 1.25[1] mas
Distance	500[5] pc
Absolute magnitude (MV)	−1.01 - 3.63[5]
Details
Luminosity	760[6] L☉
Temperature	3,234 K[6] K
Other designations
T Normae, 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.^[7] 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.^[6]

References

1. 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.
2. Otero, Sebastian Alberto (19 March 2011). "T Normae". AAVSO Website. American Association of Variable Star Observers. Retrieved 21 March 2015.
3. 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.
4. Celis s., L. (1986). "UBVRI photometry of red stars". Astrophysical Journal Supplement Series. 60: 879. Bibcode:1986ApJS...60..879C. doi:10.1086/191103.
5. 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.
6. 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.
7. Arnold, H.J.P; Doherty, Paul; Moore, Patrick (1999). The Photographic Atlas of the Stars. Boca Raton, Florida: CRC Press. p. 176. ISBN 9780750306546.