Iota Canis Majoris References Navigation...


Bayer objectsBeta Cephei variablesB-type supergiantsCanis MajorHR objectsHenry Draper Catalogue objectsHipparcos objectsFlamsteed objectsDurchmusterung objects


variablesupergiantstarconstellationCanis MajorB-typeapparent magnitudeBeta Cephei typevariable starlight yearsEarth














































































































ι Canis Majoris





Canis Major constellation map.svg

Red circle.svg






Location of ι Canis Majoris (circled)
Observation data
Epoch J2000      Equinox J2000

Constellation

Canis Major

Right ascension
 06h 56m 08.22413s[1]

Declination
−17° 03′ 15.2675″[1]

Apparent magnitude (V)
4.40[2](4.36 - 4.40[3])
Characteristics

Spectral type
B3 Ib[4]
U−B color index
−0.74[5]
B−V color index
−0.07[5]

Variable type

Beta Cephei?[2]
Astrometry
Radial velocity (Rv) +41.20[6] km/s
Proper motion (μ) RA: −3.56 ± 0.17[1] mas/yr
Dec.: +2.42 ±0.20[1] mas/yr
Parallax (π) 1.04 ± 0.20[1] mas
Distance approx. 3,100 ly
(approx. 1,000 pc)
Absolute magnitude (MV) −5.51[7]
Details
Mass 12.5[8] M
Radius 25.9[7] R
Luminosity 47,000[7] L
Surface gravity (log g) 2.60[9] cgs
Temperature 17,000[9] K

Metallicity [Fe/H]
−0.17[10] dex
Rotational velocity (v sin i) 27 ± 4[9] km/s
Age 14.8[8] Myr
Other designations
20 Canis Majoris, HR 2596, HD 51309, BD−16°1661, FK5 2536, HIP 33347, SAO 152126, GC 9107
Database references
SIMBAD data

Iota Canis Majoris (ι Canis Majoris, ι CMa) is a variable supergiant star in the constellation Canis Major.


Iota Canis Majoris is a blue-white B-type supergiant with an apparent magnitude that varies between +4.36 and +4.40.[3] It has been classified as a Beta Cephei type variable star,[3] but the supergiant spectral type and a period of over a month mean it is no longer considered to be of that type.[2] It is approximately 3,100 light years from Earth. This star has 24.9 times the radius of the Sun.



References





  1. ^ abcde van Leeuwen, F. (November 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.mw-parser-output cite.citation{font-style:inherit}.mw-parser-output .citation q{quotes:"""""""'""'"}.mw-parser-output .citation .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-limited a,.mw-parser-output .citation .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/12px-Wikisource-logo.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-maint{display:none;color:#33aa33;margin-left:0.3em}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}


  2. ^ abc Stankov, Anamarija; Handler, Gerald (2005). "Catalog of Galactic β Cephei Stars". The Astrophysical Journal Supplement Series. 158 (2): 193–216. arXiv:astro-ph/0506495. Bibcode:2005ApJS..158..193S. doi:10.1086/429408. ISSN 0067-0049.


  3. ^ abc Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S. 1: 02025. Bibcode:2009yCat....102025S.


  4. ^ Prinja, R. K.; Massa, D. L. (2010). "Signature of wide-spread clumping in B supergiant winds". Astronomy and Astrophysics. 521: L55. arXiv:1007.2744. Bibcode:2010A&A...521L..55P. doi:10.1051/0004-6361/201015252. ISSN 0004-6361.


  5. ^ ab Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV data. Bibcode:1986EgUBV........0M.


  6. ^ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. ISSN 1063-7737.


  7. ^ abc Balona, L. A.; Engelbrecht, C. A. (1985). "Photometry and frequency analysis of line profile variables". Monthly Notices of the Royal Astronomical Society. 214 (4): 559. Bibcode:1985MNRAS.214..559B. doi:10.1093/mnras/214.4.559.


  8. ^ ab Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (2011). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society. 410: 190. arXiv:1007.4883. Bibcode:2011MNRAS.410..190T. doi:10.1111/j.1365-2966.2010.17434.x.


  9. ^ abc Lefever, K.; Puls, J.; Morel, T.; Aerts, C.; Decin, L.; Briquet, M. (2010). "Spectroscopic determination of the fundamental parameters of 66 B-type stars in the field-of-view of the CoRoT satellite". Astronomy and Astrophysics. 515: A74. arXiv:0910.2851. Bibcode:2010A&A...515A..74L. doi:10.1051/0004-6361/200911956.


  10. ^ Gies, Douglas R.; Lambert, David L. (1992). "Carbon, nitrogen, and oxygen abundances in early B-type stars". Astrophysical Journal. 387: 673. Bibcode:1992ApJ...387..673G. doi:10.1086/171116.










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