| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Cygnus |
| Right ascension | 20h 15m 28.3216s |
| Declination | +47° 42′ 51.15″ |
| Apparent magnitude (V) | 4.016 |
| Characteristics | |
| Spectral type | K3Ib+ / B3 |
| Variable type | None |
| Astrometry | |
| Radial velocity (Rv) | -14.4 km/s |
| Proper motion (μ) | RA: 3.88 mas/yr Dec.: 1.20 mas/yr |
| Parallax (π) | 2.94 ± 0.6 mas |
| Distance | approx. 1100 ly (approx. 340 pc) |
| Absolute magnitude (MV) | 5.495 |
| Details | |
| Mass | 9.7 / 5 M☉ |
| Radius | 115 / 1.525 R☉ |
| Luminosity | 11.100 L☉ |
| Age | < 20 million years |
| Orbit | |
| Companion | ο2 Cyg B |
| Period (P) | 3.143 yr |
| Semimajor axis (a) | 0.0053" |
| Eccentricity (e) | 0.301 |
| Inclination (i) | 64.22° |
| Longitude of the node (Ω) | 226.62° |
| Periastron epoch (T) | 1949.615 |
| Argument of periastron (ω) (secondary) |
218.2° |
| Other designations | |
| Database references | |
| SIMBAD | data |
Omicron² Cygni or 32 Cyg is an eclipsing binary of the Algol type. A red giant or supergiant is orbited by a blue star.
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