| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cancer |
| Right ascension | 08h 51m 01.4644s[1] |
| Declination | +15° 21′ 02.364″[1] |
| Apparent magnitude (V) | 6.38[2] |
| Characteristics | |
| Spectral type | G5 V-IV[3] or G1V[4] |
| B−Vcolor index | 0.629±0.020[2] |
| Astrometry | |
| Radial velocity (Rv) | +45.098±0.032[2] km/s |
| Proper motion (μ) | RA: −112.475[1]mas/yr Dec.: +75.099[1]mas/yr |
| Parallax (π) | 24.79±0.33 mas[1] |
| Distance | 132 ± 2 ly (40.3 ± 0.5 pc) |
| Absolute magnitude (MV) | 3.39[2] |
| Details[2] | |
| Mass | 1.23±0.05 M☉ |
| Radius | 1.81±0.20 R☉ |
| Luminosity | 3.72+0.55 −0.48 L☉ |
| Surface gravity (log g) | 4.04±0.04 cgs |
| Temperature | 5,862±15 K |
| Rotational velocity (v sin i) | 3.10±0.56 km/s |
| Age | 5.0+0.7 −0.4 Gyr |
| Other designations | |
| 54 Cnc,BD+15° 1917,FK5 2699,HD 75528,HIP 43454,HR 3510,SAO 98168[4] | |
| Database references | |
| SIMBAD | data |
54 Cancri is astar in thezodiacconstellation ofCancer. It has anapparent visual magnitude of 6.38,[2] which places it just below the normal brightness limit of stars visible to the naked eye. The annualparallax shift is 24.79 mas as measured from Earth's orbit, which yields a distance estimate of about 132 light years. It is moving away from the Sun with aradial velocity of +45 km/s.[2]
Measurement of the stars proper motion over time suggest changes due to an acceleration component, which may indicate it is a close binary system.[5] The visible component has astellar classification of G5 V,[3] indicating it is an ordinaryG-type main-sequence star that is generating energy throughhydrogen fusion in itscore region. Hall et al. (2007) classify it as alow-activityvariable star.[3] The star is about five billion years old with aprojected rotational velocity of 3.1 km/s. It has 1.23 times themass of the Sun and 1.81 times theSun's radius.[2]
