Phi Cygni
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Cygnus |
| Right ascension | 19h 39m 22.60591s |
| Declination | 30° 09′ 11.9604″ |
| Apparent magnitude (V) | 4.69 |
| Characteristics | |
| Spectral type | G8III-IV |
| B−V color index | +0.96 |
| Astrometry | |
| Radial velocity (Rv) | +4.50 km/s |
| Proper motion (μ) |
RA: +2.48 mas/yr Dec.: +36.50 mas/yr |
| Parallax (π) | 12.25 ± 0.24mas |
| Distance | 266 ± 5 ly (82 ± 2 pc) |
| Absolute magnitude (MV) | 0.13 |
| Details | |
| Mass | 2.29 M☉ |
| Radius | 7.80 R☉ |
| Luminosity | 98 L☉ |
| Temperature | 4,872±22 K |
| Age | 2.70 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Phi Cygni (φ Cyg) is a class G8III (yellow giant) star in the constellation Cygnus. Its apparent magnitude is 4.69 and it is approximately 266 light years away based on parallax. It is a spectroscopic binary with two similar stars orbiting with a period of 434 days.
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