Astronomy:Omicron1 Cancri
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Cancer[1] |
| Right ascension | 08h 57m 14.950s[2] |
| Declination | +15° 19′ 21.96″[2] |
| Apparent magnitude (V) | +5.20[3] |
| Characteristics | |
| Evolutionary stage | main sequence[4][2] |
| Spectral type | A5 III[5] |
| B−V color index | +0.1540[3] |
| Astrometry | |
| Radial velocity (Rv) | −4.6±2.8[6] km/s |
| Proper motion (μ) | RA: +60.732[2] mas/yr Dec.: +20.396[2] mas/yr |
| Parallax (π) | 20.3294 ± 0.0891[2] mas |
| Distance | 160.4 ± 0.7 ly (49.2 ± 0.2 pc) |
| Absolute magnitude (MV) | +1.92[1] |
| Details | |
| Mass | 2.02[7] M☉ |
| Radius | 1.86[8] R☉ |
| Luminosity | 13.4[9] L☉ |
| Surface gravity (log g) | 3.982+0.008−0.005[10] cgs |
| Temperature | 8,145±3[10] K |
| Metallicity [Fe/H] | −0.85+0.09−0.04[10] dex |
| Rotational velocity (v sin i) | 90[7] km/s |
| Age | 598[7] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Omicron1 Cancri is a solitary,[12] white-hued star in the zodiac constellation of Cancer. Its name is a Bayer designation that is Latinized from ο1 Cancri, and abbreviated Omicron1 Cancri or ο1 Cnc. This star is faintly visible to the naked eye with an apparent visual magnitude of +5.20.[3] Based upon an annual parallax shift of 20.33 mas as seen from Earth,[2] it is located 160 light-years (49 pc) away from the Sun. It most likely forms a co-moving pair with Omicron2 Cancri.[13]
With a stellar classification of A5 III,[5] this presents as an evolved, A-type giant star. At the age of about 600 million years,[7] it has double[7] the mass of the Sun and 1.86 times the Sun's radius.[8] Omicron1 Cancri is radiating 13.4[9] times the solar luminosity from its photosphere at an effective temperature of about 8,145 K.[10] It has a high rate of spin, showing a projected rotational velocity of 90 km/s.[14]
Omicron1 Cancri has an infrared excess, indicating it surrounded by a circumstellar debris disk.[8] The signature matches a two-component disk with the spatially separated belts having temperatures of 146 K and 81 K.[9]
References
- ↑ 1.0 1.1 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A. XHIP record for this object at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 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.
- ↑ 3.0 3.1 3.2 Häggkvist, L.; Oja, T. (1966), "Photoelectric photometry of bright stars", Arkiv för Astronomi 4: 137–163, Bibcode: 1966ArA.....4..137H.
- ↑ Doyle, Lauren; Armstrong, David J.; Bayliss, Daniel; Rodel, Toby; Kunovac, Vedad (2024). "The TESS-SPOC FFI target sample explored with Gaia". Monthly Notices of the Royal Astronomical Society 529 (2): 1802. doi:10.1093/mnras/stae616. Bibcode: 2024MNRAS.529.1802D.
- ↑ 5.0 5.1 Cowley, A. et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal 74: 375–406, doi:10.1086/110819, Bibcode: 1969AJ.....74..375C.
- ↑ 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, doi:10.1051/0004-6361/201219219, A61, Bibcode: 2012A&A...546A..61D.
- ↑ 7.0 7.1 7.2 7.3 7.4 David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal 804 (2): 146, doi:10.1088/0004-637X/804/2/146, Bibcode: 2015ApJ...804..146D.
- ↑ 8.0 8.1 8.2 Rhee, Joseph H. et al. (May 2007), "Characterization of Dusty Debris Disks: The IRAS and Hipparcos Catalogs", The Astrophysical Journal 660 (2): 1556–1571, doi:10.1086/509912, Bibcode: 2007ApJ...660.1556R.
- ↑ 9.0 9.1 9.2 Vican, Laura et al. (December 2016), "Herschel Observations of Dusty Debris Disks", The Astrophysical Journal 833 (2): 19, doi:10.3847/1538-4357/833/2/263, 263, Bibcode: 2016ApJ...833..263V.
- ↑ 10.0 10.1 10.2 10.3 Royer, P. (January 2024), "MELCHIORS. The Mercator Library of High Resolution Stellar Spectroscopy", Astronomy & Astrophysics 681: id. A107, doi:10.1051/0004-6361/202346847, Bibcode: 2024A&A...681A.107R.
- ↑ "omi01 Cnc". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=omi01+Cnc.
- ↑ 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.
- ↑ Shaya, Ed J.; Olling, Rob P. (January 2011), "Very Wide Binaries and Other Comoving Stellar Companions: A Bayesian Analysis of the Hipparcos Catalogue", The Astrophysical Journal Supplement 192 (1): 17, doi:10.1088/0067-0049/192/1/2, 2, Bibcode: 2011ApJS..192....2S.
- ↑ van Belle, Gerard T. (March 2012), "Interferometric observations of rapidly rotating stars", The Astronomy and Astrophysics Review 20 (1): 51, doi:10.1007/s00159-012-0051-2, Bibcode: 2012A&ARv..20...51V.
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