Phi2 Cancri
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Cancer |
| φ2 Cnc A | |
| Right ascension | 08h 26m 47.07096s |
| Declination | +26° 56′ 07.7588″ |
| Apparent magnitude (V) | 6.26 |
| φ2 Cnc B | |
| Right ascension | 08h 26m 46.83329s |
| Declination | +26° 56′ 03.6655″ |
| Apparent magnitude (V) | 6.31 |
| Characteristics | |
| φ2 Cnc A | |
| Spectral type | A6V |
| φ2 Cnc B | |
| Spectral type | A3V |
| Astrometry | |
| φ2 Cnc A | |
| Proper motion (μ) | RA: −7.487 mas/yr Dec.: +1.202 mas/yr |
| Parallax (π) | 9.4528±0.0351 mas |
| Distance | 345 ± 1 ly (105.8 ± 0.4 pc) |
| φ2 Cnc B | |
| Proper motion (μ) | RA: −10.112 mas/yr Dec.: +0.110 mas/yr |
| Parallax (π) | 9.3703 ± 0.0306 mas |
| Distance | 348 ± 1 ly (106.7 ± 0.3 pc) |
| Details | |
| φ2 Cnc A | |
| Mass | 1.8±0.3 M☉ |
| Radius | 3.19±0.10 R☉ |
| Luminosity | 32±1 L☉ |
| Surface gravity (log g) | 3.69±0.08 cgs |
| Temperature | 7,674±133 K |
| φ2 Cnc B | |
| Mass | 2.0±0.3 M☉ |
| Radius | 2.775±0.091 R☉ |
| Surface gravity (log g) | 3.85±0.07 cgs |
| Temperature | 8,147±121 K |
| Other designations | |
| φ2 Cnc, 23 Cancri, BD+27°1612, FK5 2633, HIP 41404 | |
| φ2 Cnc A: HD 71151, HR 3311, SAO 80188 | |
| φ2 Cnc B: HD 71150, HR 3310, SAO 80187 | |
| Database references | |
| SIMBAD | φ2 Cnc A |
| φ2 Cnc B | |
Phi2 Cancri (φ2 Cancri) is a binary star in the constellation Cancer. With a combined apparent magnitude of 5.54, this system is faintly visible to the naked eye under ideal conditions. Parallax measurements give a distance of 345–348 light-years to this system.
Both components are separated by 5.126 arcseconds on the sky. φ2 Cancri A, of apparent magnitude 6.26, has a spectral type A6V, making it an A-type main sequence star. It has around 1.8 times the Sun's mass, 3.19 times the Sun's radius, and 32 times the Sun's luminosity. φ2 Cancri B, of apparent magnitude 6.31, is also an A-type main sequence star, of spectral type A3V. It has two times the Sun's mass, 2.8 times the radius, and a hotter surface temperature than φ2 Cancri A: 8,140 K versus 7,670 K.