Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Cancer |
Right ascension | 09h 02m 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 | |
Database references | |
SIMBAD | data |
Nu Cancri, Latinised from ν Cancri, is a binary star [6] in the zodiac constellation of Cancer. 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 temperature of 10,250 K. [7]