Nu Cancri
| 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[1] mas |
| Distance | 390 ± 20 ly (120 ± 5 pc) |
| Orbit[5] | |
| Period (P) | 1401.4 d |
| Eccentricity (e) | 0.35 |
| Periastron epoch (T) | 2419687 JD |
| Argument of periastron (ω) (secondary) | 264° |
| Semi-amplitude (K1) (primary) | 7.7 km/s |
| Details | |
| ν Cnc A | |
| Mass | 2.82±0.13[6] M☉ |
| Luminosity | 93[6] L☉ |
| Temperature | 10,250[6] K |
| Rotational velocity (v sin i) | 18.9±0.4[6] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
Nu Cancri (ν Cancri) is a binary star[5] 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.[6] 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.[6]
References
- 1 2 3 4 5 6 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, Bibcode:2007A&A...474..653V, arXiv:0708.1752
, doi:10.1051/0004-6361:20078357. - 1 2 3 4 Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99), Bibcode:1966CoLPL...4...99J.
- 1 2 Royer, F.; et al. (October 2002), "Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i", Astronomy and Astrophysics, 393: 897–911, Bibcode:2002A&A...393..897R, arXiv:astro-ph/0205255 , doi:10.1051/0004-6361:20020943.
- ↑ de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, Bibcode:2012A&A...546A..61D, arXiv:1208.3048 , doi:10.1051/0004-6361/201219219, A61.
- 1 2 Pourbaix, D.; et al. (2004), "SB9: The ninth catalogue of spectroscopic binary orbits", Astronomy & Astrophysics, 424 (2): 727, Bibcode:2004A&A...424..727P, arXiv:astro-ph/0406573 , doi:10.1051/0004-6361:20041213.
- 1 2 3 4 5 6 Wraight, K. T.; et al. (February 2012), "A photometric study of chemically peculiar stars with the STEREO satellites - I. Magnetic chemically peculiar stars", Monthly Notices of the Royal Astronomical Society, 420 (1): 757−772, Bibcode:2012MNRAS.420..757W, arXiv:1110.6283 , doi:10.1111/j.1365-2966.2011.20090.x.
- ↑ "nu. Cnc -- Spectroscopic binary", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2017-06-17.