TX Piscium

TX Piscium
Location of TX Piscium (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Pisces
Right ascension 23h 46m 23.51645s[1]
Declination +03° 29′ 12.5190″[1]
Apparent magnitude (V) 4.79 - 5.20[2]
Characteristics
Spectral type C7,2[3]
U−B color index +3.33[4]
B−V color index +2.60[4]
Variable type Lb[2]
Astrometry
Radial velocity (Rv)+11.5±1.5[5] km/s
Proper motion (μ) RA: −32.086[1] mas/yr
Dec.: −24.545[1] mas/yr
Parallax (π)4.0894 ± 0.2124 mas[1]
Distance800 ± 40 ly
(240 ± 10 pc)
Absolute magnitude (MV)−2.22[5]
Details
Mass1 – 3[6] M☉
Radius295[6] R☉
Luminosity7,019 – 7,876[6] L☉
Surface gravity (log g)−0.2 – −0.5[6] cgs
Temperature3,080 – 3,170[6] K
Metallicity [Fe/H]−0.39[7] dex
Other designations
19 Psc, TX Psc, BD+02°4709, FK5 3908, HD 223075, HIP 117245, HR 9004, SAO 128374
Database references
SIMBADdata

TX Piscium (19 Piscium) is a variable red giant star in the constellation Pisces. It is amongst the reddest naked eye stars, with a significant reddish hue when seen in binoculars. It is approximately 800 light years from Earth. It is close to—and sometimes considered part of—the asterism on the western end of the constellation called the circlet of Pisces.

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