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) | +25.43±0.04 km/s |
| Proper motion (μ) | RA: +92.450 mas/yr Dec.: -129.755 mas/yr |
| Parallax (π) | 26.0059±0.1271 mas |
| Distance | 126±0.65 ly (38.7±0.2 pc) |
| Absolute magnitude (MV) | 2.23 |
| Orbit | |
| Period (P) | 30.43885±0.00002 days |
| Semi-major axis (a) | 6.99±0.06 mas |
| Eccentricity (e) | 0.6421±0.0006 |
| Longitude of the node (Ω) | 150.2±0.3° |
| Periastron epoch (T) | 57,340.551±0.003 JD |
| Argument of periastron (ω) (primary) | 207.71±0.11° |
| Semi-amplitude (K1) (primary) | 52.24±0.06 km/s |
| Semi-amplitude (K2) (secondary) | 53.15±0.06 km/s |
| Details | |
| 43 Per Aa | |
| Mass | 1.434±0.014 M☉ |
| Radius | 1.67±0.06 R☉ |
| Surface gravity (log g) | 4.15±0.02 cgs |
| Temperature | 6,790±120 K |
| Metallicity [Fe/H] | 0.00 dex |
| Rotational velocity (v sin i) | 14.1±0.9 km/s |
| 43 Per Ab | |
| Mass | 1.409±0.014 M☉ |
| Radius | 1.6±0.1 R☉ |
| Surface gravity (log g) | 4.18±0.03 cgs |
| Temperature | 6,770±90 K |
| Metallicity [Fe/H] | 0.00 dex |
| Rotational velocity (v sin i) | 10.6±1.7 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 38.7 parsecs (126.2 ly) distant from the Sun, based on its dynamical parallax.
This is a double-lined spectroscopic binary with an orbital period of 30.4 days and an eccentricity of 0.6. It has also been spatially resolved with interferometry at the CHARA array. 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).