Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Cancer |
Right ascension | 08h 26m 43.94035s [1] |
Declination | +12° 39′ 16.6066″ [1] |
Apparent magnitude (V) | +5.56 [2] |
Characteristics | |
Evolutionary stage | Asymptotic giant branch [3] |
Spectral type | M3 IIIa [4] |
B−V color index | 1.608±0.002 [2] |
Variable type | SRb [3] |
Astrometry | |
Radial velocity (Rv) | −8.30±0.31 [5] km/s |
Proper motion (μ) |
RA: −19.760
[1]
mas/
yr Dec.: −104.664 [1] mas/ yr |
Parallax (π) | 3.3094 ± 0.3176 mas [1] |
Distance | 990 ± 90
ly (300 ± 30 pc) |
Absolute magnitude (MV) | −1.62 [2] |
Details | |
Radius | 119 [1] R☉ |
Luminosity | 2,455+707 −550 [6] L☉ |
Surface gravity (log g) | 1.00 [6] cgs |
Temperature | 3,574 [6] K |
Metallicity [Fe/H] | 0.00 [6] dex |
Other designations | |
Database references | |
SIMBAD | data |
27 Cancri is a single [8] star in the zodiac constellation of Cancer, located around 990 light-years away from the Sun. [1] It is visible to the naked eye as a faint, red-hued star with a typical apparent visual magnitude of around +5.56. [2] The star is moving closer to the Earth with a heliocentric radial velocity of −8.3 km/s. [5] It is a member of the Arcturus stream, a group of stars with high proper motion and metal-poor properties thought to be the remnants of a small galaxy consumed by the Milky Way. [9]
This is an aging red giant with a stellar classification of M3 IIIa, [4] currently on the asymptotic giant branch. [3] It is classified as a semiregular variable star of type SRb and its brightness varies from magnitude +5.41 to +5.75 with a period of 40 days. [10] The star is radiating around 2,455 [6] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 3,574 K. [6]