43 Persei is a binary star[7][11] 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.[2] The system is located around 38.5 parsecs (125.4 ly) distant from the Sun, based on parallax.[1]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Perseus |
Right ascension | 03h 56m 36.52069s[1] |
Declination | 50° 41′ 43.3646″[1] |
Apparent magnitude (V) | 5.28[2] |
Characteristics | |
Spectral type | F5V[3] |
U−B color index | +0.00[4] |
B−V color index | +0.41[4] |
Astrometry | |
Radial velocity (Rv) | +39.10[5] km/s |
Proper motion (μ) | RA: +92.450[1] mas/yr Dec.: -129.755[1] mas/yr |
Parallax (π) | 26.0059 ± 0.1271 mas[6] |
Distance | 125.4 ± 0.6 ly (38.5 ± 0.2 pc) |
Absolute magnitude (MV) | 2.23[2] |
Orbit[7] | |
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[8] M☉ |
Radius | 2.4[8] R☉ |
Luminosity | 10.81[2] L☉ |
Surface gravity (log g) | 4.12[9] cgs |
Temperature | 6,609[9] K |
Metallicity [Fe/H] | 0.00[2] dex |
Rotational velocity (v sin i) | 17[10] km/s |
Other designations | |
Database references | |
SIMBAD | data |
This is a double-lined spectroscopic binary with an orbital period of 30.4 days and an eccentricity of 0.6.[7] The primary component is an F-type main-sequence star with a stellar classification of F5V,[3] a star that is fusing its core hydrogen. It has 1.54[8] times the mass of the Sun, 2.4[8] times the Sun's radius, and is spinning with a projected rotational velocity of 17 km/s (11 mi/s).[10] The star shines 10.8[2] times brighter than the Sun at an effective temperature of 6,609 K (6,336 °C; 11,437 °F).[9]
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).[12]