Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Cancer |
Right ascension | 08h 38m 05.17248s [1] |
Declination | +09° 34′ 28.6006″ [1] |
Apparent magnitude (V) | 6.542 [2] |
Characteristics | |
Evolutionary stage | main sequence [3] |
Spectral type | A1 V [4] [5] |
B−V color index | −0.010±0.006 [6] |
Astrometry | |
Radial velocity (Rv) | +22.1±2.2 [6] km/s |
Proper motion (μ) |
RA: −28.271
[1]
mas/
yr Dec.: −4.237 [1] mas/ yr |
Parallax (π) | 6.5093 ± 0.0735 mas [1] |
Distance | 501 ± 6
ly (154 ± 2 pc) |
Absolute magnitude (MV) | 1.30 [6] |
Details | |
Mass | 2.66±0.05 [3] M☉ |
Radius | 1.8 [7] R☉ |
Luminosity | 30.9+3.0 −2.7 [2] L☉ |
Surface gravity (log g) | 4.30 [2] cgs |
Temperature | 9,830 [2] K |
Metallicity [Fe/H] | −0.21±0.13 [2] dex |
Rotational velocity (v sin i) | 35.2±1.1 [2] km/s |
Other designations | |
Database references | |
SIMBAD | data |
37 Cancri is a star in the zodiac constellation of Cancer. It is a challenge to view with the naked eye, having an apparent magnitude of 6.54. [2] The star is moving away from the Earth with a heliocentric radial velocity of +22 km/s, having come as close as 246 light-years some 2.7 million years ago. [6]
This is an ordinary A-type main-sequence star with a stellar classification of A1 V, [4] which indicates it is generating energy through hydrogen fusion at its core. It is spinning with a projected rotational velocity of 35 km/s. [2] The star has 2.7 [3] times the mass of the Sun and around 1.8 [7] times the Sun's radius. It is radiating 31 times the luminosity of the Sun from its photosphere at an effective temperature of 9,830 K. [2]