T Cephei

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T Cephei
T cephei.jpg
Location of T Cep
Observation data
Epoch J2000      Equinox J2000
Constellation Cepheus
Right ascension 21h 09m 31.78089s[1]
Declination +68° 29′ 27.2038″[1]
Apparent magnitude (V) 7.33[2]
Spectral type M6-9e[3]
U−B color index +0.33[2]
B−V color index +1.49[2]
Variable type Mira[4]
Radial velocity (Rv) −8.03[5] km/s
Proper motion (μ) RA: −43.75[1] mas/yr
Dec.: −45.46[1] mas/yr
Parallax (π) 5.33 ± 0.90[1] mas
Distance 190[4] pc
Radius 329+70
[6] R
Luminosity 5,700[4] L
Temperature 2,400[4] K
Other designations
T Cephei, HR 8113, HD 202012, HIP 104451, BD+67°1291, GC 29611, SAO 19229, GSC 04460-02400
Database references

T Cephei is a Mira variable star in the constellation Cepheus. Located approximately 190 parsecs (620 ly) distant, it varies between magnitudes 5.2 and 11.3 over a period of around 388 days.[4][7]

It is a star of spectral class M6-9e, whose radius is 329 solar radii.

Meeting its coordinates are: Lat: 88.346 °; Long: -47.756 ° Its rotation speed is 20 km/s and radial -3.4 km/s.

See also[edit]


  1. ^ a b c d e Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. arXiv:0708.1752Freely accessible. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. 
  2. ^ a b c Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D. 
  3. ^ Keenan, Philip C.; Garrison, Robert F.; Deutsch, Armin J. (1974). "Revised Catalog of Spectra of Mira Variables of Types ME and Se". Astrophysical Journal Supplement. 28: 271. Bibcode:1974ApJS...28..271K. doi:10.1086/190318. 
  4. ^ a b c d e Danilovich, T.; Teyssier, D.; Justtanont, K.; Olofsson, H.; Cerrigone, L.; Bujarrabal, V.; Alcolea, J.; Cernicharo, J.; Castro-Carrizo, A.; García-Lario, P.; Marston, A. (2015). "New observations and models of circumstellar CO line emission of AGB stars in the Herschel SUCCESS programme". Astronomy & Astrophysics. 581: A60. arXiv:1506.09065Freely accessible. Bibcode:2015A&A...581A..60D. doi:10.1051/0004-6361/201526705. 
  5. ^ Famaey, B.; Jorissen, A.; Luri, X.; Mayor, M.; Udry, S.; Dejonghe, H.; Turon, C. (2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters". Astronomy and Astrophysics. 430: 165. arXiv:astro-ph/0409579Freely accessible. Bibcode:2005A&A...430..165F. doi:10.1051/0004-6361:20041272. 
  6. ^ Gerd Weigelt; et al. (2003). "JHK-band spectro-interferometry of T Cep with the IOTA interferometer". SPIE. 4838: 181–184. 
  7. ^ VSX (4 January 2010). "T Cep". AAVSO Website. American Association of Variable Star Observers. Retrieved 1 July 2014. 

External links[edit]