3 Cancri
3 Cancri is a single star in the zodiac constellation of Cancer, located around 810 light years from the Sun. It is visible to the naked eye as a dim, orange-hued star with an apparent visual magnitude of 5.60. This object is moving further from the Earth with a heliocentric radial velocity of +39.5 km/s, and may be a member of the Hyades group. It is located near the ecliptic and thus is subject to lunar eclipses.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cancer |
| Right ascension | 08h 00m 47.30744s |
| Declination | +17° 18′ 31.3283″ |
| Apparent magnitude (V) | 5.60 |
| Characteristics | |
| Evolutionary stage | horizontal branch(86%chance) |
| Spectral type | K3 III |
| B−V color index | 1.317 |
| Astrometry | |
| Radial velocity (Rv) | +39.55±0.16 km/s |
| Proper motion (μ) | RA: −10.403 mas/yr Dec.: −3.905 mas/yr |
| Parallax (π) | 4.0087 ± 0.1511 mas |
| Distance | 810 ± 30 ly (249 ± 9 pc) |
| Absolute magnitude (MV) | −1.29 |
| Details | |
| Mass | 2.9 M☉ |
| Radius | 40 R☉ |
| Luminosity | 568.61 L☉ |
| Surface gravity (log g) | 2.05 cgs |
| Temperature | 4,300 K |
| Rotational velocity (v sin i) | 5.73 km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
This is an aging giant star with a stellar classification of K3 III that is most likely (86% chance) on the horizontal branch. The star has 2.9 times the mass of the Sun and has expanded to 40 times the Sun's radius. It is radiating 569 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,300 K.