66 Cancri
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cancer |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | 5.870[2] (5.95 + 8.56)[3] |
| Characteristics | |
| Evolutionary stage | main sequence[4] |
| Spectral type | A2 V[2] |
| B−V Template:Engvar | Script error: No such module "val".[5] |
| Astrometry | |
| Radial velocity (Rv) | Script error: No such module "val".[6] km/s |
| Proper motion (μ) | RA: +0.48[7] mas/yr Dec.: +0.34[7] mas/yr |
| Parallax (π) | 6.8850±0.1020 mas[1] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | 0.14[5] |
| Details | |
| Mass | Script error: No such module "val".[4] Template:Solar mass |
| Luminosity | Script error: No such module "val".[4] Template:Solar luminosity |
| Surface gravity (log g) | 4.0[2][4] cgs |
| Temperature | Script error: No such module "val".[4] K |
| Rotational velocity (v sin i) | 183[4] km/s |
| Age | 162[2] Myr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[8] | |
| Database references | |
| SIMBAD | data |
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66 Cancri is a binary star[9] system near the northern border of the zodiac constellation of Cancer, located 474 light years away from the Sun. It is visible to the naked eye as a faint, white-hued star with a combined apparent visual magnitude of 5.87.[2] The pair are moving closer to the Earth with a heliocentric radial velocity of −13 light years.[6] As of 2003, the magnitude 8.56 companion was located at an angular separation of Script error: No such module "val". along a position angle of 134° from the primary.[9]
The brighter member of the system, designated component A, is an A-type main-sequence star with a stellar classification of A2 V.[2] It is around 162[2] million years old with a high rate of spin, showing a projected rotational velocity of 183 km/s.[4] Estimates of the mass of the star range from 1.7[10] up to 2.73[4] times the mass of the Sun. It is radiating 96[4] times the Sun's luminosity from its photosphere at an effective temperature of 8,974 K.[4]
References
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- ↑ a b c Template:Cite Gaia DR2
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- ↑ Template:Cite simbad
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