TX Piscium

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TX Piscium
Pisces constellation map.svg
Red circle.svg

Location of TX Piscium (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Pisces
Right ascension 23h 46m 23.51708s[1]
Declination +03° 29′ 12.5244″[1]
Apparent magnitude (V) 4.79 - 5.20[2]
Spectral type C5III
U−B color index +3.33[3]
B−V color index +2.60[3]
Variable type Lb[2]
Parallax (π) 3.63 ± 0.39[1] mas
Distance approx. 900 ly
(approx. 280 pc)
Radius 310[4] R
Temperature 3,070[4] K
Other designations
19 Psc, TX Psc, BD+02° 4709, FK5 3908, HD 223075, HIP 117245, HR 9004, SAO 128374
Database references

TX Piscium (a.k.a. 19 Psc) is a variable carbon star in the constellation Pisces. It is amongst the reddest stars known, with a significant reddish hue when seen in binoculars.

TX Piscium is of spectral class C5 and its apparent magnitude varies from +4.9 to +5.5 in an irregular manner. It is approximately 760 light years from Earth. It has a radius of 310 R.[4]


  1. ^ a b c 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.  Vizier catalog entry
  2. ^ a b Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S. 
  3. ^ a b 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. 
  4. ^ a b c Luttermoser, Donald G; Brown, Alexander (1992). "A VLA 3.6 centimeter survey of N-type carbon stars". Astrophysical Journal. 384: 634. Bibcode:1992ApJ...384..634L. doi:10.1086/170905.