14 Cancri is a star in the northern zodiac constellation of Cancer. It can be referred to as ψ Cancri, very occasionally as ψ2 Cancri, to distinguish it from 13 Cancri which is sometimes called ψ1 Cancri.[7] It is just barely visible to the naked eye, having an apparent visual magnitude of +5.73.[2] Based upon an annual parallax shift of 24.18 mas as seen from Earth,[1] it is located 135 light years from the Sun. It may be a member of the Wolf 630 moving group of stars.[8]
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Canis Major |
| Right ascension | 08h 10m 27.18056 s[1] |
| Declination | +25° 30′ 26.4061″[1] |
| Apparent magnitude (V) | +5.73[2] |
| Characteristics | |
| Spectral type | G7 V[3] |
| U−B color index | +0.43[2] |
| B−V color index | +0.81[2] |
| Astrometry | |
| Radial velocity (Rv) | −44.48±0.09[4] km/s |
| Proper motion (μ) | RA: −73.35[1] mas/yr Dec.: −347.60[1] mas/yr |
| Parallax (π) | 24.18 ± 0.35 mas[1] |
| Distance | 135 ± 2 ly (41.4 ± 0.6 pc) |
| Absolute magnitude (MV) | +2.65[5] |
| Details[4] | |
| Mass | 1.49±0.04 M☉ |
| Radius | 3.20±0.11 R☉ |
| Luminosity | 8 L☉ |
| Surface gravity (log g) | 3.87±0.08 cgs |
| Temperature | 5,311±23 K |
| Metallicity [Fe/H] | −0.12±0.06 dex |
| Rotational velocity (v sin i) | 0.98±0.42 km/s |
| Age | 2.39±0.14 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
This object has a stellar classification of G7 V,[3] which would suggest it is a G-type main-sequence star. However, Jofré et al. (2015) consider it to be a more evolved subgiant star due to a surface gravity of log g = 3.87. As such, it has an estimated 1.5 times the mass of the Sun and 3.2 times the Sun's radius. The star is 2.4 billion years old with what appears to be a leisurely rotation rate, judging by a projected rotational velocity of 0.98 km/s. It is radiating eight times the Sun's luminosity from its photosphere at an effective temperature of 5,311 K.[4]
References
edit- ^ a b c d e f van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600.
- ^ a b c d Argue, A. N. (1966), "UBV photometry of 550 F, G and K type stars", Monthly Notices of the Royal Astronomical Society, 133 (4): 475, Bibcode:1966MNRAS.133..475A, doi:10.1093/mnras/133.4.475.
- ^ a b Cowley, A. P.; Bidelman, W. P. (February 1979), "MK spectral types for some F and G stars", Publications of the Astronomical Society of the Pacific, 91: 83–86, Bibcode:1979PASP...91...83C, doi:10.1086/130446.
- ^ a b c Jofré, E.; et al. (2015), "Stellar parameters and chemical abundances of 223 evolved stars with and without planets", Astronomy & Astrophysics, 574: A50, arXiv:1410.6422, Bibcode:2015A&A...574A..50J, doi:10.1051/0004-6361/201424474, S2CID 53666931.
- ^ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
- ^ "tet Cnc". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-09-08.
- ^ Kostjuk, N. D. (2004), "VizieR Online Data Catalog: HD-DM-GC-HR-HIP-Bayer-Flamsteed Cross Index (Kostjuk, 2002)", VizieR On-line Data Catalog: IV/27A. Originally Published in: Institute of Astronomy of Russian Academy of Sciences (2002), 4027, Bibcode:2004yCat.4027....0K.
- ^ McDonald, A. R. E.; Hearnshaw, J. B. (August 1983), "The Wolf 630 moving group of stars", Monthly Notices of the Royal Astronomical Society, 204 (3): 841–852, Bibcode:1983MNRAS.204..841M, doi:10.1093/mnras/204.3.841.