Astronomy:1 Cancri
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Cancer |
| Right ascension | 07h 56m 59.45262s[1] |
| Declination | +15° 47′ 25.0019″[1] |
| Apparent magnitude (V) | 5.97[2] |
| Characteristics | |
| Spectral type | K3− III[3] |
| B−V color index | 1.285±0.007[4] |
| Astrometry | |
| Radial velocity (Rv) | +13.55±0.12[1] km/s |
| Proper motion (μ) | RA: −26.731[1] mas/yr Dec.: −42.7591[1] mas/yr |
| Parallax (π) | 6.9810 ± 0.0694[1] mas |
| Distance | 467 ± 5 ly (143 ± 1 pc) |
| Absolute magnitude (MV) | 0.03[4] |
| Details | |
| Mass | 1.1[5] M☉ |
| Radius | 18.7[6] R☉ |
| Luminosity | 199[1] L☉ |
| Surface gravity (log g) | 2.03[7] cgs |
| Temperature | 4,231[7] K |
| Metallicity [Fe/H] | −0.01[7] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
1 Cancri is a single[2] star in the zodiac constellation of Cancer, positioned near the border with Gemini at a distance of around 467 light years from the Sun. It is barely visible to the naked eye as a dim, orange-hued star with an apparent visual magnitude of 5.97. The object is moving further from the Earth with a heliocentric radial velocity of +14 km/s.
This is an evolved giant star with a stellar classification of K3− III,[3] having exhausted the hydrogen at its core and expanded. It is specified as a spectral standard for that type.[3] The angular diameter of the star measured from a lunar occultation is 2.1±0.6 mas,[9] which, at its estimated distance, equates to a physical radius of about 19 times the radius of the Sun. It is radiating 199 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,231 K.
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 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.
- ↑ 2.0 2.1 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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
- ↑ 3.0 3.1 3.2 Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins catalog of revised MK types for the cooler stars", Astrophysical Journal Supplement Series 71: 245, doi:10.1086/191373, Bibcode: 1989ApJS...71..245K.
- ↑ 4.0 4.1 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A. et al. (August 2019), "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18", Astronomy & Astrophysics 628: A94, doi:10.1051/0004-6361/201935765, ISSN 0004-6361, Bibcode: 2019A&A...628A..94A.
- ↑ Stassun, Keivan G. et al. (September 2018), "The TESS Input Catalog and Candidate Target List", The Astronomical Journal 156 (3): 102, doi:10.3847/1538-3881/aad050, ISSN 0004-6256, Bibcode: 2018AJ....156..102S.
- ↑ 7.0 7.1 7.2 Sprague, Dani et al. (8 March 2022), "APOGEE Net: An Expanded Spectral Model of Both Low-mass and High-mass Stars", The Astronomical Journal 163 (4): 152, doi:10.3847/1538-3881/ac4de7, ISSN 0004-6256, Bibcode: 2022AJ....163..152S.
- ↑ "1 Cnc". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=1+Cnc.
- ↑ Richichi, A. et al. (February 2005), "CHARM2: An updated Catalog of High Angular Resolution Measurements", Astronomy and Astrophysics 431 (2): 773–777, doi:10.1051/0004-6361:20042039, Bibcode: 2005A&A...431..773R
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