Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Cygnus |
Right ascension | 19h 38m 41.18316s[2] |
Declination | +54° 58′ 25.6420″[2] |
Apparent magnitude (V) | 5.889±0.015,[3] 6.37[4] |
Characteristics | |
Spectral type | F6V[5] (F5 V + F5 V)[3] |
B−V color index | 0.482±0.004[5] |
Variable type | Algol[4] |
Astrometry | |
Radial velocity (Rv) | −13.9±0.2[5] km/s |
Proper motion (μ) | RA: +34.885[2] mas/yr Dec.: +162.839[2] mas/yr |
Parallax (π) | 24.7090 ± 0.0422 mas[2] |
Distance | 132.0 ± 0.2 ly (40.47 ± 0.07 pc) |
Absolute magnitude (MV) | 2.83[5] |
Orbit[3] | |
Period (P) | 7.64075217±0.00000051 d[6] |
Semi-major axis (a) | 22.6950 AU |
Eccentricity (e) | 0.5378±0.0003 |
Inclination (i) | 87.0±1.0° |
Argument of periastron (ω) (secondary) | 0.860±0.001° |
Semi-amplitude (K1) (primary) | 88.02±0.05 km/s |
Semi-amplitude (K2) (secondary) | 89.97±0.10 km/s |
Details[3] | |
V1143 Cyg A | |
Mass | 1.356±0.003 M☉ |
Radius | 1.339±0.023 R☉ |
Luminosity | 2.83±0.2[7] L☉ |
Surface gravity (log g) | 4.317±0.015 cgs |
Temperature | 6,450±100 K |
Metallicity [Fe/H] | 0.08 dex |
Rotational velocity (v sin i) | 18±3[7] km/s |
V1143 Cyg B | |
Mass | 1.328±0.002 M☉ |
Radius | 1.316±0.023 R☉ |
Luminosity | 2.65±0.2[7] L☉ |
Surface gravity (log g) | 4.323±0.015 cgs |
Temperature | 6,400±100 K |
Rotational velocity (v sin i) | 28±3[7] km/s |
Other designations | |
Database references | |
SIMBAD | data |
HR 7484 (V1143 Cyg) is a binary star system in the northern constellation of Cygnus. It is dimly visible to the naked eye under good viewing conditions, having an apparent visual magnitude of 5.89.[3] Based upon an annual parallax shift of 24.71,[2] it is located 132 light years away. The system is moving closer with a heliocentric radial velocity of −14 km/s.[5]
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