Psi Eridani
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Eridanus |
| Right ascension | 05h 01m 26.34578s |
| Declination | −07° 10′ 26.2732″ |
| Apparent magnitude (V) | 4.81 |
| Characteristics | |
| Evolutionary stage | Main sequence |
| Spectral type | B3 V or B3 IV |
| U−B color index | −0.75 |
| B−V color index | −0.19 |
| Astrometry | |
| Radial velocity (Rv) | 20.7±1.1 km/s |
| Proper motion (μ) | RA: +1.315 mas/yr Dec.: +7.002 mas/yr |
| Parallax (π) | 3.5964±0.1432 mas |
| Distance | 910 ± 40 ly (280 ± 10 pc) |
| Absolute magnitude (MV) | −1.97 |
| Details | |
| Mass | 6.875+0.130 −0.122 M☉ |
| Radius | 6.63+0.22 −0.27 R☉ |
| Luminosity | 3,329+171 −232 L☉ |
| Surface gravity (log g) | 3.55±0.02 cgs |
| Temperature | 17,025+51 −52 K |
| Rotational velocity (v sin i) | 52±8 km/s |
| Age | 31.6±0.6 Myr |
| Other designations | |
| ψ Eri, BD−07°948, 65 Eridani, HD 32249, HIP 23364, HR 1617, SAO 131700 | |
| Database references | |
| SIMBAD | data |
Psi Eridani is a star in the constellation Eridanus. Its name is a Bayer designation that is Latinized from ψ Eridani, and abbreviated Psi Eri or ψ Eri. With an apparent visual magnitude is 4.81, it can be seen with the naked eye on a clear, dark night. Based upon an annual parallax shift of 4.41 milliarcseconds, it is located roughly 740 light-years distant.
This is a B-type main-sequence star with a stellar classification of B3 V. The main sequence class is further supported by stellar evolution models. It is about 32 million years old and has a projected rotational velocity of 52 km/s. The star has 6.9 times the mass of the Sun and 6.63 times the Sun's radius. Psi Eridani shines with 3,329 times the solar luminosity from its outer atmosphere at an effective temperature of 17,025 K.