TX Piscium
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Pisces |
| Right ascension | 23h 46m 23.51645s |
| Declination | +03° 29′ 12.5190″ |
| Apparent magnitude (V) | 4.79 - 5.20 |
| Characteristics | |
| Evolutionary stage | AGB |
| Spectral type | C7,2 |
| U−B color index | +3.33 |
| B−V color index | +2.60 |
| Variable type | Lb |
| Astrometry | |
| Radial velocity (Rv) | +11.5±1.5 km/s |
| Proper motion (μ) | RA: −32.086 mas/yr Dec.: −24.545 mas/yr |
| Parallax (π) | 4.0894±0.2124 mas |
| Distance | 800 ± 40 ly (240 ± 10 pc) |
| Absolute magnitude (MV) | −2.22 |
| Details | |
| Mass | 1 – 3 M☉ |
| Radius | 295 R☉ |
| Luminosity | 7,019 – 7,876 L☉ |
| Surface gravity (log g) | −0.2 – −0.5 cgs |
| Temperature | 3,080 – 3,170 K |
| Metallicity [Fe/H] | −0.39 dex |
| Other designations | |
| 19 Psc, TX Psc, BD+02°4709, FK5 3908, HD 223075, HIP 117245, HR 9004, SAO 128374 | |
| Database references | |
| SIMBAD | data |
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.