43 Persei
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Perseus |
| Right ascension | 03h 56m 36.52069s |
| Declination | +50° 41′ 43.3646″ |
| Apparent magnitude (V) | 5.28 |
| Characteristics | |
| Spectral type | F5V |
| U−B color index | +0.00 |
| B−V color index | +0.41 |
| Astrometry | |
| Radial velocity (Rv) | +39.10 km/s |
| Proper motion (μ) | RA: +92.450 mas/yr Dec.: -129.755 mas/yr |
| Parallax (π) | 26.0059±0.1271 mas |
| Distance | 125.4 ± 0.6 ly (38.5 ± 0.2 pc) |
| Absolute magnitude (MV) | 2.23 |
| Orbit | |
| Period (P) | 30.438 days |
| Semi-major axis (a) | ≥ 16 Gm (0.11 AU) |
| Eccentricity (e) | 0.631 |
| Periastron epoch (T) | 2,440,873.14 JD |
| Argument of periastron (ω) (secondary) | 27.07° |
| Semi-amplitude (K1) (primary) | 51.85 km/s |
| Semi-amplitude (K2) (secondary) | 54.40 km/s |
| Details | |
| Mass | 1.54 M☉ |
| Radius | 2.4 R☉ |
| Luminosity | 10.81 L☉ |
| Surface gravity (log g) | 4.12 cgs |
| Temperature | 6,609 K |
| Metallicity [Fe/H] | 0.00 dex |
| Rotational velocity (v sin i) | 17 km/s |
| Other designations | |
| A Persei, 43 Per, BD+50°860, GC 4728, HD 24546, HIP 18453, HR 1210, SAO 24314, CCDM J03566+5042AP, WDS J03566+5042AD | |
| Database references | |
| SIMBAD | data |
43 Persei is a binary star system in the northern constellation Perseus. It is visible to the naked eye as a dim, yellow-white hued star with an apparent visual magnitude of 5.28. The system is located around 38.5 parsecs (125.4 ly) distant from the Sun, based on parallax.
This is a double-lined spectroscopic binary with an orbital period of 30.4 days and an eccentricity of 0.6. The primary component is an F-type main-sequence star with a stellar classification of F5V, a star that is fusing its core hydrogen. It has 1.54 times the mass of the Sun, 2.4 times the Sun's radius, and is spinning with a projected rotational velocity of 17 km/s (11 mi/s). The star shines 10.8 times brighter than the Sun at an effective temperature of 6,609 K (6,336 °C; 11,437 °F).
There are distant companions B (separation 75.5" and magnitude 10.66), C (separation 85.6" and magnitude 12.18), and D (separation 68" and magnitude 13.43).