34 Cancri
Star in the constellation Cancer
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34 Cancri is a star in the zodiac constellation of Cancer, located about 568 light years away from the Sun.[1] It is a challenge to view with the naked even under good viewing conditions, having an apparent visual magnitude of 6.48.[2] At the distance of this star, its visual magnitude is diminished by an extinction of 0.14 due to interstellar dust.[8]
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cancer |
| Right ascension | 08h 32m 39.87069s[1] |
| Declination | +10° 03′ 57.6306″[1] |
| Apparent magnitude (V) | 6.48[2] |
| Characteristics | |
| Evolutionary stage | main sequence[3] |
| Spectral type | A1 V[4][5] |
| B−V color index | −0.007±0.007[2] |
| Astrometry | |
| Radial velocity (Rv) | −11.0±7.4[6] km/s |
| Proper motion (μ) | RA: +4.517[1] mas/yr Dec.: −6.139[1] mas/yr |
| Parallax (π) | 5.7408±0.0912 mas[1] |
| Distance | 568 ± 9 ly (174 ± 3 pc) |
| Absolute magnitude (MV) | 0.40[2] |
| Details | |
| Mass | 2.67±0.09[3] M☉ |
| Radius | 3.2[7] R☉ |
| Luminosity | 69.84[2] L☉ |
| Surface gravity (log g) | 3.83[7] cgs |
| Temperature | 9,661±111[3] K |
| Rotational velocity (v sin i) | 18[3] km/s |
| Age | 336[2] Myr |
| Other designations | |
| 34 Cnc, BD+10°1818, GC 11689, HD 72359, HIP 41904, HR 3372, SAO 97902[5] | |
| Database references | |
| SIMBAD | data |
This is an A-type main-sequence star with a stellar classification of A1 V.[4] It is a chemically peculiar star, possibly of the magnetic-type (CP2), showing an abnormal abundance of strontium.[9] The star is an estimated 336[2] million years old with only a moderate projected rotational velocity of 18 km/s.[3] It has an estimated 2.7 times the mass of the Sun[3] and about 3.2 times the Sun's radius.[7] The star is radiating 70 times the Sun's luminosity[2] from its photosphere at an effective temperature of 9,661 K.[3]