Astronomy:46 Cancri
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Short description: Star in the constellation Cancer
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Cancer |
| Right ascension | 08h 45m 21.42393s[1] |
| Declination | +30° 41′ 51.9004″[1] |
| Apparent magnitude (V) | 6.122[2] |
| Characteristics | |
| Evolutionary stage | red giant branch[1] |
| Spectral type | G5 III[3] |
| B−V color index | 0.912[2] |
| Astrometry | |
| Radial velocity (Rv) | –13.1[2] km/s |
| Proper motion (μ) | RA: −1.273[1] mas/yr Dec.: −4.845[1] mas/yr |
| Parallax (π) | 5.3592 ± 0.0254[1] mas |
| Distance | 609 ± 3 ly (186.6 ± 0.9 pc) |
| Absolute magnitude (MV) | 0.297[4] |
| Details | |
| Mass | 2.65[2] M☉ |
| Radius | 14.8[5] R☉ |
| Luminosity | 125.9[2] L☉ |
| Surface gravity (log g) | 2.82[6] cgs |
| Temperature | 5,119[6] K |
| Metallicity [Fe/H] | −0.02[6] dex |
| Rotational velocity (v sin i) | 6.6[7] km/s |
| Age | 740[2] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
46 Cancri is a star in the zodiac constellation of Cancer, located around 609 light years away from the Sun. It is a dim, yellow-hued star, near the lower limits of visibility to the naked eye with an apparent visual magnitude of 6.12.[2] The star is moving closer to the Earth with a heliocentric radial velocity of –13.1 km/s.[2] It has a stellar classification of G5 III,[3] matching an aging giant star that has consumed the hydrogen at its core and evolved away from the main sequence.
46 Cancri is 740 million years old with 2.65[2] times the mass of the Sun. It has expanded to about 11[9] times the Sun's radius and is radiating 125.9[2] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,966 K.[2]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 Luck, R. Earle (2015), "Abundances in the Local Region. I. G and K Giants", Astronomical Journal 150 (3): 88, doi:10.1088/0004-6256/150/3/88, Bibcode: 2015AJ....150...88L.
- ↑ 3.0 3.1 Hoffleit, Dorrit (1964), Catalogue of Bright Stars (3rd ed.), New Haven, Conn.: Yale University Observatory, Bibcode: 1964cbs..book.....H.
- ↑ Liu, Yujuan et al. (August 2010), "Stellar Parameters and Abundance Analysis of 58 Late G Giants", Publications of the Astronomical Society of Japan 62 (4): 1071–1084, doi:10.1093/pasj/62.4.1071, Bibcode: 2010PASJ...62.1071L.
- ↑ Stassun, Keivan G. et al. (2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. Bibcode: 2019AJ....158..138S.
- ↑ 6.0 6.1 6.2 Ye, Xianhao; Wu, Wenbo; Allende Prieto, Carlos; Aguado, David S.; Zhao, Jingkun; González Hernández, Jonay I.; Rebolo, Rafael; Zhao, Gang et al. (2025). "Mapping the Milky Way with Gaia Bp/Rp spectra: I. Systematic flux corrections and atmospheric parameters for 68 million stars". Astronomy and Astrophysics 695. doi:10.1051/0004-6361/202452871. Bibcode: 2025A&A...695A..75Y.
- ↑ De Medeiros, J. R. et al. (November 2000), "Rotation and lithium in single giant stars", Astronomy and Astrophysics 363: 239–243, Bibcode: 2000A&A...363..239D.
- ↑ "46 Cnc". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=46+Cnc.
- ↑ Pasinetti Fracassini, L. E. et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics 367: 521–524, doi:10.1051/0004-6361:20000451, Bibcode: 2001A&A...367..521P.
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