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Omicron1 Cancri

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Star in the constellation Cancer For other stars with this Bayer designation, see ο Cancri.
Omicron Cancri
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Cancer
Right ascension 08 57 14.95026
Declination +15° 19′ 21.9512″
Apparent magnitude (V) +5.20
Characteristics
Spectral type A5 III
B−V color index +0.1540
Astrometry
Radial velocity (Rv)−4.6±2.8 km/s
Proper motion (μ) RA: +61.47 mas/yr
Dec.: +19.40 mas/yr
Parallax (π)21.87 ± 0.26 mas
Distance149 ± 2 ly
(45.7 ± 0.5 pc)
Absolute magnitude (MV)+1.92
Details
Mass2.02 M☉
Radius1.86 R☉
Luminosity13.4 L☉
Surface gravity (log g)4.16 cgs
Temperature8,636±294 K
Rotational velocity (v sin i)90 km/s
Age598 Myr
Other designations
ο Cnc, 62 Cancri, BD+15° 1945, HD 76543, HIP 43970, HR 3561, SAO 98247
Database references
SIMBADdata

Omicron Cancri, Latinised from ο Cancri, is a solitary, white-hued star in the zodiac constellation of Cancer. It is visible to the naked eye with an apparent visual magnitude of +5.20. Based upon an annual parallax shift of 21.87 mas as seen from Earth, this star is located around 149 light-years from the Sun. It most likely forms a co-moving pair with Omicron Cancri.

With a stellar classification of A5 III, this appears to be an evolved, A-type giant star. At the age of about 600 million years, it has double the mass of the Sun and 1.86 times the Sun's radius. Omicron Cancri is radiating 13.4 times the solar luminosity from its photosphere at an effective temperature of about 8,636 K.

Omicron Cancri has an infrared excess, indicating it surrounded by a circumstellar debris disk. The signature matches a two-component disk with the spatially separated belts having temperatures of 146 K and 81 K.

References

  1. ^ 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.
  2. ^ Häggkvist, L.; Oja, T. (1966), "Photoelectric photometry of bright stars", Arkiv för Astronomi, 4: 137–163, Bibcode:1966ArA.....4..137H.
  3. ^ Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal, 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819.
  4. 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, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID 59451347, A61.
  5. 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.
  6. ^ 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, arXiv:1501.03154, Bibcode:2015ApJ...804..146D, doi:10.1088/0004-637X/804/2/146, S2CID 33401607.
  7. ^ Rhee, Joseph H.; et al. (May 2007), "Characterization of Dusty Debris Disks: The IRAS and Hipparcos Catalogs", The Astrophysical Journal, 660 (2): 1556–1571, arXiv:astro-ph/0609555, Bibcode:2007ApJ...660.1556R, doi:10.1086/509912, S2CID 11879505.
  8. ^ Vican, Laura; et al. (December 2016), "Herschel Observations of Dusty Debris Disks", The Astrophysical Journal, 833 (2): 19, arXiv:1607.03754, Bibcode:2016ApJ...833..263V, doi:10.3847/1538-4357/833/2/263, S2CID 119271799, 263.
  9. "omi01 Cnc". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-06-15.{{cite web}}: CS1 maint: postscript (link)
  10. 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, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
  11. 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, arXiv:1007.0425, Bibcode:2011ApJS..192....2S, doi:10.1088/0067-0049/192/1/2, S2CID 119226823, 2.
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