Epsilon Piscis Austrini
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Piscis Austrinus |
| Right ascension | 22h 40m 39.34075s |
| Declination | −27° 02′ 37.0157″ |
| Apparent magnitude (V) | +4.17 |
| Characteristics | |
| Spectral type | B8 Ve or B8 IVe |
| U−B color index | −0.31 |
| B−V color index | −0.11 |
| Astrometry | |
| Radial velocity (Rv) | +1.1±2.8 km/s |
| Proper motion (μ) | RA: +23.22 mas/yr Dec.: −0.16 mas/yr |
| Parallax (π) | 8.0981±0.3582 mas |
| Distance | 400 ± 20 ly (123 ± 5 pc) |
| Absolute magnitude (MV) | −1.66 |
| Details | |
| Mass | 4.10±0.19 M☉ |
| Radius | 3.2 R☉ |
| Luminosity | 661 L☉ |
| Surface gravity (log g) | 3.93 cgs |
| Temperature | 11,066 K |
| Rotational velocity (v sin i) | 216 km/s |
| Other designations | |
| ε PsA, 18 Piscis Austrini, CD−27°16010, FK5 854, HD 214748, HIP 111954, HR 8628, SAO 191318 | |
| Database references | |
| SIMBAD | data |
Epsilon Piscis Austrini, Latinized from ε Piscis Austrini, is a blue-white hued star in the southern constellation of Piscis Austrinus. It is visible to the naked eye with an apparent visual magnitude of +4.17. Based upon an annual parallax shift of 8.0981 ± 0.3582 mas as seen from the Gaia satellite, the system is located roughly 400 light years from the Sun.
This is a B-type main sequence star with a stellar classification of B8 Ve. It is a Be star that is spinning rapidly with a projected rotational velocity of 216 km/s, compared to an equatorial critical velocity of 301 km/s. The star has 4.1 times the mass of the Sun and is radiating 661 times the solar luminosity from its photosphere at an effective temperature of 11,066 K.
Epsilon Piscis Austrini is moving through the Galaxy at 18.7 km/s relative to the Sun. Its projected Galactic orbit carries it between 23,917 and 28,138 light-years from the center of the Galaxy.