29 Cancri
Star in the constellation Cancer
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29 Cancri is a star in the zodiac constellation of Cancer, located 370 light years from the Sun. It is just visible to the naked eye as a dim, white-hued star with an apparent visual magnitude of 5.94.[2] The star is situated near the ecliptic, which means it is subject to lunar occultations.[9]
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cancer |
| Right ascension | 08h 28m 37.33859s[1] |
| Declination | +12° 39′ 16.6066″[1] |
| Apparent magnitude (V) | 5.94[2] |
| Characteristics | |
| Evolutionary stage | main sequence[3] |
| Spectral type | A5 V[4] |
| B−V color index | 0.201±0.010[2] |
| Astrometry | |
| Radial velocity (Rv) | +2.0±4.3[5] km/s |
| Proper motion (μ) | RA: −13.928[1] mas/yr Dec.: −12.558[1] mas/yr |
| Parallax (π) | 8.8043±0.0747 mas[1] |
| Distance | 370 ± 3 ly (113.6 ± 1.0 pc) |
| Absolute magnitude (MV) | 0.83[2] |
| Details | |
| Mass | 2.30±0.04[3] M☉ |
| Radius | 3.6[6] R☉ |
| Luminosity | 44.8+3.3 −3.1[3] L☉ |
| Surface gravity (log g) | 3.56[6] cgs |
| Temperature | 7,727±71[3] K |
| Rotational velocity (v sin i) | 117[3] km/s |
| Age | 784[7] Gyr |
| Other designations | |
| 29 Cnc, BD+14°1899, FK5 1222, HD 71555, HIP 41578, HR 3333, SAO 97843[8] | |
| Database references | |
| SIMBAD | data |
This is an A-type main-sequence star with a stellar classification of A5 V,[4] which indicates it is generating energy through hydrogen fusion at its core. It has 2.3 times the mass of the Sun[3] and around 3.6 times the Sun's radius.[6] The star has a relatively high rate of rotation, showing a projected rotational velocity of 117 km/s. It is radiating 45 times the Sun's luminosity from its photosphere at an effective temperature of 7,727 K.[3]