| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Cepheus |
| Right ascension | 22h 05m 08.7891s |
| Declination | +62° 16′ 47.32″' |
| Apparent magnitude (V) | 5.11 |
| Characteristics | |
| Spectral type | O9.5Ib / O9Ib / ? |
| U−B color index | -0.84 |
| B−V color index | -0.08 |
| Variable type | None |
| Astrometry | |
| Radial velocity (Rv) | -12.8 ± 0.9 km/s |
| Proper motion (μ) | RA: -1.76 mas/yr Dec.: -3.01 mas/yr |
| Parallax (π) | 0.60 ± 0.49 mas |
| Distance | approx. 5000 ly (approx. 2000 pc) |
| Absolute magnitude (MV) | 5.19 |
| Details | |
| Mass | 30-35 M☉ |
| Radius | 20-30 R☉ |
| Luminosity | 180000 L☉ |
| Temperature | ? K |
| Metallicity | ? |
| Rotation | ? |
| Age | ? years |
| Other designations | |
| Orbit | |
| Companion | 19 Cep B |
| Period (P) | ? yr |
| Semimajor axis (a) | 19.8 arcsec |
| Eccentricity (e) | ? |
| Orbit | |
| Companion | 19 Cep C |
| Period (P) | ? yr |
| Semimajor axis (a) | 60.4 arcsec |
| Eccentricity (e) | ? |
19 Cep is a triple star.
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