Zeta Canis Minoris

Zeta Canis Minoris (ζ Canis Minoris) is a solitary,[9] blue-white hued star in the equatorial constellation of Canis Minor. It is a dim star but visible to the naked eye with an apparent visual magnitude of 5.13.[2] Based upon an annual parallax shift of 5.23 mas as seen from Earth,[1] this star is located around 410 light years from the Sun. It is moving away from the Sun with a radial velocity of +32.3 km/s.[4]

ζ Canis Minoris
Location of ζ Canis Minoris (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Canis Minor
Right ascension 07h 51m 41.98835s[1]
Declination +01° 46′ 00.7395″[1]
Apparent magnitude (V) 5.13[2]
Characteristics
Spectral type B8 II[3]
U−B color index −0.46[2]
B−V color index −0.13[2]
Astrometry
Radial velocity (Rv)+32.3±2.8[4] km/s
Proper motion (μ) RA: −14.43[1] mas/yr
Dec.: −2.40[1] mas/yr
Parallax (π)5.23 ± 0.36[1] mas
Distance620 ± 40 ly
(190 ± 10 pc)
Absolute magnitude (MV)−1.32[5]
Details
Mass3.98±0.10[6] M☉
Luminosity490[6] L☉
Surface gravity (log g)3.36[7] cgs
Temperature13,500[7] K
Rotational velocity (v sin i)28.0[7] km/s
Other designations
ζ CMi, 13 CMi, BD+02° 1808, GC 6, HD 63975, HIP 38373, HR 3059, SAO 116043[8]
Database references
SIMBADdata

This is a B-type bright giant star with a stellar classification of B8 II.[3] It is a Mercury-Manganese star, showing an overabundance of these elements in its spectrum. The mean longitudinal magnetic field strength is 8.28±11.55 G.[10] The star has about four times the mass of the Sun and is radiating 490[6] times the Sun's luminosity from its photosphere at an effective temperature of 13,500 K.[7]

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.
  2. Fernie, J. D. (May 1983), "New UBVRI photometry for 900 supergiants", Astrophysical Journal Supplement Series, 52: 7–22, Bibcode:1983ApJS...52....7F, doi:10.1086/190856.
  3. Houk, N.; Swift, C. (1999), "Michigan catalogue of two-dimensional spectral types for the HD Stars", Michigan Spectral Survey, Department of Astronomy, Univ. Michigan, 5, Bibcode:1999MSS...C05....0H.
  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, A61.
  5. Huang, W.; et al. (2012), "A catalogue of Paschen-line profiles in standard stars", Astronomy & Astrophysics, 547: A62, arXiv:1210.7893, Bibcode:2012A&A...547A..62H, doi:10.1051/0004-6361/201219804.
  6. Hohle, M. M.; et al. (April 2010), "Masses and luminosities of O- and B-type stars and red supergiants", Astronomische Nachrichten, 331 (4): 349, arXiv:1003.2335, Bibcode:2010AN....331..349H, doi:10.1002/asna.200911355.
  7. Ghazaryan, S.; Alecian, G. (August 2016), "Statistical analysis from recent abundance determinations in HgMn stars", Monthly Notices of the Royal Astronomical Society, 460 (2): 1912–1922, Bibcode:2016MNRAS.460.1912G, doi:10.1093/mnras/stw911
  8. "zet CMi". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-08-31.
  9. 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.
  10. Makaganiuk, V.; et al. (January 2011), "The search for magnetic fields in mercury-manganese stars", Astronomy and Astrophysics, 525: A97, arXiv:1010.3931, Bibcode:2011A&A...525A..97M, doi:10.1051/0004-6361/201015666.
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