43 Persei
Spectroscopic binary star system in the constellation Perseus
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43 Persei is a binary star[7][8] 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 38.7 parsecs (126.2 ly) distant from the Sun, based on its dynamical parallax.[5]
 | |
| 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) | +25.43±0.04[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 | 126±0.65 ly (38.7±0.2 pc)[5] |
| Absolute magnitude (MV) | 2.23[2] |
| Orbit[5] | |
| 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[5] | |
| 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[2] 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[2] 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 |
This is a double-lined spectroscopic binary with an orbital period of 30.4 days and an eccentricity of 0.6.[7] It has also been spatially resolved with interferometry at the CHARA array.[5] 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).[9]