Lambda Cephei
Star in the constellation Cepheus / From Wikipedia, the free encyclopedia
Lambda Cephei (λ Cephei) is a fifth magnitude blue supergiant star in the constellation Cepheus, one of the hottest and most luminous visible to the naked eye.
Quick Facts Constellation, Right ascension ...
Observation data Epoch J2000.0 Equinox J2000.0 | |
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Constellation | Cepheus |
Right ascension | 22h 11m 30.57571s[1] |
Declination | +59° 24′ 52.15″[1] |
Apparent magnitude (V) | +5.050[2] |
Characteristics | |
Spectral type | O6.5If(n)p[3] |
U−B color index | −0.622[2] |
B−V color index | +0.237[2] |
Astrometry | |
Radial velocity (Rv) | -75.10[4] km/s |
Proper motion (μ) | RA: -7.46[1] mas/yr Dec.: -11.09[1] mas/yr |
Parallax (π) | 1.65 ± 0.22 mas[1] |
Distance | 950[2] pc |
Absolute magnitude (MV) | -6.43[2] |
Details[2] | |
Mass | 51.4 M☉ |
Radius | 18[5] - 21[6] R☉ |
Luminosity | 630,000 L☉ |
Surface gravity (log g) | 3.54 cgs |
Temperature | 36,000 K |
Rotation | 210 |
Age | 4.0 Myr |
Other designations | |
Database references | |
SIMBAD | data |
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