Xi Cancri
Xi Cancri (ξ Cancri, abbreviated Xi Cnc, ξ Cnc) is a spectroscopic binary star system in the zodiac constellation of Cancer. It is visible to the naked eye with an apparent visual magnitude of +5.15. Based upon parallax measurements obtained during the Hipparcos mission, it is roughly 370 light-years distant from the Sun.
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Cancer |
| Right ascension | 09h 09m 21.53325s |
| Declination | +22° 02′ 43.6053″ |
| Apparent magnitude (V) | +5.15 (5.70 + 6.20) |
| Characteristics | |
| Spectral type | G9 III Fe-1 CH-0.5 |
| U−B color index | +0.75 |
| B−V color index | +0.96 |
| Astrometry | |
| Radial velocity (Rv) | +7.7±0.3 km/s |
| Proper motion (μ) | RA: −1.00 mas/yr Dec.: −0.52 mas/yr |
| Parallax (π) | 8.74 ± 0.49 mas |
| Distance | 370 ± 20 ly (114 ± 6 pc) |
| Absolute magnitude (MV) | −0.12 |
| Orbit | |
| Period (P) | 1,700.76 d |
| Semi-major axis (a) | 0.0105±0.0017″ |
| Eccentricity (e) | 0.06 |
| Periastron epoch (T) | 2,428,876.86 ± 10.0 JD |
| Argument of periastron (ω) (secondary) | 301.1° |
| Semi-amplitude (K1) (primary) | 4.4 km/s |
| Details | |
| Luminosity | 118 L☉ |
| Temperature | 5,101 K |
| Other designations | |
| Database references | |
| SIMBAD | data |
The two components are designated Xi Cancri A (formally named Nahn /ˈnɑːn/) and B.
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