| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cancer |
| Right ascension | 09h01m 48.83393s[1] |
| Declination | +27° 54′ 09.3505″[1] |
| Apparent magnitude (V) | 6.07[2] (6.08 + 9.22)[3] |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | A8 Vn[4] |
| B−V color index | 0.243±0.008[2] |
| Astrometry | |
| Radial velocity (Rv) | +12.0±4.3[5] km/s |
| Proper motion (μ) | RA: −57.037[1] mas/yr Dec.: −80.127[1] mas/yr |
| Parallax (π) | 16.7647 ± 0.1550 mas[1] |
| Distance | 195 ± 2 ly (59.6 ± 0.6 pc) |
| Absolute magnitude (MV) | 2.25[2] |
| Details | |
| 67 Cnc A | |
| Mass | 1.89[6] M☉ |
| Radius | 1.90+0.07 −0.14[1] R☉ |
| Luminosity | 10.465+0.111 −0.112[1] L☉ |
| Surface gravity (log g) | 4.35[6] cgs |
| Temperature | 7,982±271[6] K |
| Rotational velocity (v sin i) | 105[7] km/s |
| Age | 867[6] Myr |
| Other designations | |
67 Cnc, BD+28°1674, HD 77190, HIP 44342, HR 3589, SAO 80585, WDS 09014+3215[8] | |
| Database references | |
| SIMBAD | data |
67 Cancri is a wide binary star[9] system in the zodiac constellationofCancer, located 195[1] light years away from the Sun. It is just visible to the naked eye as a faint, white-hued star with a combined apparent magnitude of 6.07.[2] The binary nature of this system was discovered by James South and John Herschel.[3] As of 2007, the two components have an angular separationof103.9″, corresponding to a projected separationof6,100 AU.[9] They are moving further from the Earth with a heliocentric radial velocity of +12 km/s.[5]
The primary, designated component A, is an A-type main-sequence star with a stellar classification of A8 Vn.[4] The 'n' notation indicates "nebulous" lines due to rapid rotation. It is a shell star,[10] with weak shell lines of singly-ionized titanium being detected in the near ultraviolet in 1970. These may have come from a sporadic mass loss event.[11] Uesugi and Fukuda (1970) gave a projected rotational velocity estimate of 105[7] km/s for the star, although Abt et al. (1997) suggested it could be as high as 205 km/s.[11]
67 Cancri A is about 867[6] million years old with 1.89[6] times the mass of the Sun and 1.90[1] times the Sun's radius. It is radiating 10.5[1] times the Sun's luminosity from its photosphere at an effective temperature of 7,982 K.[6]
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