Psi Andromedae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda |
| Right ascension | 23h 46m 02.04703s |
| Declination | +46° 25′ 12.9865″ |
| Apparent magnitude (V) | 4.95 |
| Characteristics | |
| Spectral type | G5 Ib + B9 |
| U−B color index | +0.83 |
| B−V color index | +1.085 |
| Astrometry | |
| Radial velocity (Rv) | -23.62 km/s |
| Proper motion (μ) | RA: 8.446(132) mas/yr Dec.: −7.143(109) mas/yr |
| Parallax (π) | 1.6352±0.1627 mas |
| Distance | 2,000 ± 200 ly (610 ± 60 pc) |
| Absolute magnitude (MV) | –3.039 |
| Details | |
| ψ And A | |
| Mass | 5.4 M☉ |
| Radius | 59+8 −10 R☉ |
| Luminosity | 1,049±161 L☉ |
| Surface gravity (log g) | 1.50 cgs |
| Temperature | 4,276±182 K |
| Metallicity [Fe/H] | +0.10 dex |
| Age | 79 Myr |
| B | |
| Mass | 2.6 M☉ |
| Temperature | 11,000 K |
| Other designations | |
| 20 And, BD+45°4321, FK5 1622, HD 223047, HIP 117221, HR 9003, SAO 53355, PPM 64635 | |
| Database references | |
| SIMBAD | data |
Psi Andromedae (ψ And, ψ Andromedae) is the Bayer designation for a triple star system in the northern constellation of Andromeda. The combined apparent visual magnitude of this system is 4.95. Based upon parallax measurements, is roughly 2,000 light-years (610 parsecs) from Earth.
The primary component has a stellar classification of G5 Ib, which matches the spectrum of an evolved supergiant star. It forms a pair with a star of type B9 with an unknown luminosity class separated by 0.28 arcseconds. A third component has a separation of 0.14 arcseconds. Details of the orbital arrangement remain uncertain.