19 Cephei
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. 5,000 ly (approx. 2,000 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 |
Semi-major axis (a) | 19.8 arcsec |
Eccentricity (e) | ? |
Orbit | |
Companion | 19 Cep C |
Period (P) | ? yr |
Semi-major axis (a) | 60.4 arcsec |
Eccentricity (e) | ? |
19 Cephei is a triple star system in Cepheus.[1] The primary component is an O-type star.
References
- ↑ "19 CEP (19 Cephei)". Retrieved 28 August 2014.
|