52 Persei is a suspected triple star[2] system in the northern constellation of Perseus. It has the Bayer designation f Persei, while 52 Persei is the Flamsteed designation.[6] The system is visible to the naked eye as a faint, yellow-hued point of light with an apparent visual magnitude of 4.68.[2] It is located around 600 light years away from the Sun based on parallax, and is drifting closer with a radial velocity of −4.5 km/s.[4]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Perseus |
| Right ascension | 04h 14m 53.32924s[1] |
| Declination | +40° 29′ 01.1973″[1] |
| Apparent magnitude (V) | 4.68[2] |
| Characteristics | |
| Spectral type | G5II + A2V[3] |
| B−V color index | 1.007±0.007[4] |
| Astrometry | |
| Radial velocity (Rv) | −4.50±0.74[4] km/s |
| Proper motion (μ) | RA: +1.249[1] mas/yr Dec.: −30.506[1] mas/yr |
| Parallax (π) | 5.4208 ± 0.2593 mas[1] |
| Distance | 600 ± 30 ly (184 ± 9 pc) |
| Absolute magnitude (MV) | −1.6 / 1.1[2] |
| Orbit[5] | |
| Period (P) | 1576.44 days |
| Eccentricity (e) | 0.41 |
| Periastron epoch (T) | 2,425,927.4 JD |
| Argument of periastron (ω) (secondary) | 66.7° |
| Semi-amplitude (K1) (primary) | 18.1 km/s |
| Details | |
| f Per A | |
| Mass | 4.0[2] M☉ |
| Radius | 32.40+1.47 −0.83[1] R☉ |
| Luminosity | 531.1±28.7[1] L☉ |
| Temperature | 4868+64 −107[1] K |
| f Per B | |
| Mass | 2.4[2] M☉ |
| Temperature | 10,232[2] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
The variable velocity of this system was reported by W. W. Campbell in 1918. It is a single-lined spectroscopic binary with an orbital period of 4.3 years and an eccentricity of 0.4.[5] The components have a visual magnitude difference of 2.7 and are unresolved by speckle interferometry.[2]
The primary component is an evolved bright giant star with a stellar classification of G5II.[3] It has four[2] times the mass of the Sun and has expanded to 32[1] times the Sun's radius. The star is radiating 531[1] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,868 K.[1] The secondary is a suspected binary of unknown period, with its components having estimated masses equal to 2.4 and 1.0 times the mass of the Sun.[2] The more massive member of the pair has an estimated spectral class of A2V,[3] matching an A-type main-sequence star.