Nu Cancri
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Cancer |
| Right ascension | 09h 02m 44.26543s |
| Declination | +24° 27′ 10.4902″ |
| Apparent magnitude (V) | +5.46 |
| Characteristics | |
| Spectral type | A0 III |
| U−B color index | −0.10 |
| B−V color index | −0.03 |
| Astrometry | |
| Radial velocity (Rv) | −15.6±0.7 km/s |
| Proper motion (μ) | RA: −2.48 mas/yr Dec.: −7.67 mas/yr |
| Parallax (π) | 8.31±0.35 mas |
| Distance | 390 ± 20 ly (120 ± 5 pc) |
| Absolute magnitude (MV) | +0.05 |
| Orbit | |
| Period (P) | 1401.4 d |
| Eccentricity (e) | 0.35 |
| Periastron epoch (T) | 2419687 Julian day |
| Argument of periastron (ω) (secondary) | 264° |
| Semi-amplitude (K1) (primary) | 7.7 km/s |
| Details | |
| ν Cnc A | |
| Mass | 2.82±0.13 M☉ |
| Luminosity | 93 L☉ |
| Temperature | 10,250 K |
| Metallicity [Fe/H] | −0.20±0.04 dex |
| Rotational velocity (v sin i) | 18.9±0.4 km/s |
| Other designations | |
| ν Cnc, 69 Cancri, BD+25°2029, FK5 2714, HD 77350, HIP 44405, HR 3595, SAO 80595 | |
| Database references | |
| SIMBAD | data |
Nu Cancri, Latinised from ν Cancri, is a binary star in the zodiac constellation of Cancer. It is faintly visible to the naked eye with an apparent visual magnitude of +5.46. Based upon an annual parallax shift of 8.31 mas as seen from the Earth, the star is located roughly 390 light-years from the Sun.
This is a single-lined spectroscopic binary system with an orbital period of 3.8 years and an eccentricity of 0.35. The primary, component A, is a white-hued A-type giant star with a stellar classification of A0 III. It is a magnetic Ap star with a field strength of 846×10−4 T, showing abundance peculiarities in strontium, chromium and mercury. The star has 2.8 times the mass of the Sun and is radiating 93 times the Sun's luminosity from its photosphere at an effective temperature of 10,250 K.