Phi1 Cancri
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Cancer |
Right ascension | 08h 26m 27.70615s[1] |
Declination | +27° 53′ 36.8867″[1] |
Apparent magnitude (V) | +5.57[2] |
Characteristics | |
Spectral type | K5 III[3] |
U−B color index | +1.68[2] |
B−V color index | +1.40[2] |
Astrometry | |
Radial velocity (Rv) | ±0.19 +25.25[4] km/s |
Proper motion (μ) | RA: −33.28[1] mas/yr Dec.: −116.17[1] mas/yr |
Parallax (π) | 8.74 ± 0.40[1] mas |
Distance | 370 ± 20 ly (114 ± 5 pc) |
Details | |
Radius | 17[5] R☉ |
Luminosity | 121[6] L☉ |
Temperature | 4,138[6] K |
Metallicity [Fe/H] | ±0.093 −0.134[7] dex |
Rotational velocity (v sin i) | 1.3[8] km/s |
Other designations | |
Database references | |
SIMBAD | data |
Phi1 Cancri (φ1 Cancri) is a solitary,[3] orange-hued star in the constellation Cancer. It is faintly visible to the naked eye with an apparent visual magnitude of +5.57.[2] Based upon an annual parallax shift of 8.74 mas,[1] it is approximately 370 light years from the Sun.
This is an evolved K-type giant star with a stellar classification of K5 III.[3] The measured angular diameter of this star, after correction for limb darkening, is ±0.02 mas. 1.87[10] At the estimated distance of Phi1 Cancri, this yields a physical size of about 17 times the radius of the Sun.[5] It is radiating 121 times the Sun's luminosity from its photosphere at an effective temperature of 4,138 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 Ducati, J. R. (2002), "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system", CDS/ADC Collection of Electronic Catalogues, 2237, Bibcode:2002yCat.2237....0D.
- 1 2 3 Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, Bibcode:2008MNRAS.389..869E, arXiv:0806.2878 , doi:10.1111/j.1365-2966.2008.13596.x.
- ↑ 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 Lang, Kenneth R. (2006), Astrophysical formulae, Astronomy and astrophysics library, 1 (3rd ed.), Birkhäuser, ISBN 3-540-29692-1. The radius (R*) is given by:
- 1 2 3 Cousins, A. W. J.; et al. (1966), "Photoelectric magnitudes and colours of southern stars, II", Royal Observatory bulletins, 121, Bibcode:1966RGOB..121....1C.
- ↑ Taylor, B. J. (February 1999), "Catalogs of temperatures and [Fe/H] averages for evolved G and K stars", Astronomy and Astrophysics Supplement, 134: 523–524, Bibcode:1999A&AS..134..523T, doi:10.1051/aas:1999153.
- ↑ 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, arXiv:astro-ph/0010273 .
- ↑ "phi01 Cnc -- Star", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2017-06-09.
- ↑ Richichi, A.; et al. (February 2005), "CHARM2: An updated Catalog of High Angular Resolution Measurements", Astronomy and Astrophysics, 431: 773–777, Bibcode:2005A&A...431..773R, doi:10.1051/0004-6361:20042039.
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