| |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Cancer |
| Right ascension | 09h02m 44.26543s[1] |
| Declination | +24° 27′ 10.4902″[1] |
| Apparent magnitude (V) | +5.46[2] |
| Characteristics | |
| Spectral type | A0 III[3] |
| U−B color index | −0.10[2] |
| B−V color index | −0.03[2] |
| Astrometry | |
| Radial velocity (Rv) | −15.6±0.7[4] km/s |
| Proper motion (μ) | RA: −2.48[1] mas/yr Dec.: −7.67[1] mas/yr |
| Parallax (π) | 8.31 ± 0.35 mas[1] |
| Distance | 390 ± 20 ly (120 ± 5 pc) |
| Absolute magnitude (MV) | +0.05[5] |
| Orbit[6] | |
| 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[7] M☉ |
| Luminosity | 93[7] L☉ |
| Temperature | 10,250[7] K |
| Metallicity [Fe/H] | −0.20±0.04[5] dex |
| Rotational velocity (v sin i) | 18.9±0.4[7] km/s |
| Other designations | |
ν Cnc, 69 Cancri, BD+25° 2029, FK5 2714, HD 77350, HIP 44405, HR 3595, SAO 80595[8] | |
| Database references | |
| SIMBAD | data |
Nu Cancri, Latinised from ν Cancri, is a binary star[6] in the zodiac constellationofCancer. It is faintly visible to the naked eye with an apparent visual magnitude of +5.46.[2] Based upon an annual parallax shift of 8.31 mas as seen from the Earth,[1] 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.[3] It is a magnetic Ap star with a field strength of 846×10−4 T, showing abundance peculiarities in strontium, chromium and mercury.[7] 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 temperatureof10,250 K.[7]
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