Lambda Cancri
Blue-white hued star in the constellation Cancer / From Wikipedia, the free encyclopedia
Lambda Cancri (λ Cancri, abbreviated Lambda Cnc, λ Cnc) is a blue-white-hued spectroscopic binary star[2] in the zodiac constellation of Cancer. With a combined apparent visual magnitude of +5.93, it is faintly visible to the naked eye.[2] Based upon parallax measurements obtained during the Gaia mission, it is about 550 light-years distant from the Sun.[5]
Quick Facts Constellation, Right ascension ...
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Cancer |
Right ascension | 08h 20m 32.13630s[1] |
Declination | +24° 01′ 20.3198″[1] |
Apparent magnitude (V) | +5.93[2] |
Characteristics | |
Spectral type | B9.5 V[3][2] |
Astrometry | |
Radial velocity (Rv) | +23.0±4.3[4] km/s |
Proper motion (μ) | RA: −20.29[1] mas/yr Dec.: −18.81[1] mas/yr |
Parallax (π) | 5.9490 ± 0.1482 mas[5] |
Distance | 550 ± 10 ly (168 ± 4 pc) |
Absolute magnitude (MV) | +0.19[6] |
Details[2] | |
λ Cnc A | |
Mass | 2.1+0.39 −0.32 M☉ |
Luminosity | 78[7] L☉ |
Surface gravity (log g) | 4.0±0.25 cgs |
Temperature | 9,500±1,000 K |
Rotational velocity (v sin i) | 188[8] km/s |
Age | 105+287 −93 Myr |
λ Cnc B | |
Mass | 0.8 M☉ |
Temperature | 4,562±154 K |
Metallicity [Fe/H] | −0.5 dex |
Rotational velocity (v sin i) | 10 km/s |
Other designations | |
Database references | |
SIMBAD | data |
Close
The two components are designated Lambda Cancri A (formally named Piautos /piˈɔːtɒs/)[10] and B.