Astronomy:Delta1 Canis Minoris

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Short description: Star in the constellation Canis Minor


For other stars with this Bayer designation, see δ Canis Minoris.
δ1 Canis Minoris
Canis Minor constellation map.svg
Red circle.svg
Location of δ1 Canis Minoris (circled)
Observation data
Equinox J2000.0]] (ICRS)
Constellation Canis Minor
Right ascension  07h 32m 05.94912s[1]
Declination +01° 54′ 52.1263″[1]
Apparent magnitude (V) +5.25[2]
Characteristics
Spectral type F0 V[3] or F0 III[4]
U−B color index +0.20[2]
B−V color index +0.22[2]
Astrometry
Radial velocity (Rv)+29.1±2.8[5] km/s
Proper motion (μ) RA: −1.64[1] mas/yr
Dec.: −1.10[1] mas/yr
Parallax (π)4.29 ± 0.27[1] mas
Distance760 ± 50 ly
(230 ± 10 pc)
Absolute magnitude (MV)−1.59[6]
Details
Luminosity319[7] L☉
Surface gravity (log g)3.64±0.09[8] cgs
Temperature7,623±86[8] K
Metallicity [Fe/H]+0.15±0.05[8] dex
Rotational velocity (v sin i)50[9] km/s
Other designations
δ1 CMi, 7 CMi, BD+02°1691, FK5 2587, GC 10085, HD 59881, HIP 36641, HR 2880, SAO 115581[10]
Database references
SIMBADdata

Delta1 Canis Minoris, Latinized from δ1 Canis Minoris, is a solitary,[11] yellow-white hued star in the constellation Canis Minor. It is faintly visible to the naked eye with an apparent visual magnitude of +5.25.[2] Based upon an annual parallax shift of 4.29 mas as seen from Earth,[1] this star is located roughly 760 light years from the Sun.

Houk and Swift (1999) list a stellar classification of F0 V[3] for Delta1 Canis Minoris, indicating it is an F-type main-sequence star. However, Cowley et al. (1969) gave it a class of F0 III, which would suggest it is instead an evolved giant star.[4] The spectrum displays a higher than solar metallicity – a term indicating the abundance of elements other than hydrogen and helium compared to the Sun. The star is spinning with a projected rotational velocity of 50[9] km/s and is radiating 319[7] times the Sun's luminosity from its photosphere at an effective temperature of 7,623 K.[8]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V. 
  2. ↑ 2.0 2.1 2.2 2.3 Johnson, H. L. et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory 4 (99): 99, Bibcode: 1966CoLPL...4...99J. 
  3. ↑ 3.0 3.1 Houk, N.; Swift, C. (1999), "Michigan catalogue of two-dimensional spectral types for the HD Stars", Michigan Spectral Survey 5, Bibcode: 1999MSS...C05....0H. 
  4. ↑ 4.0 4.1 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. 
  5. ↑ 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. 
  6. ↑ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A. 
  7. ↑ 7.0 7.1 McDonald, I. et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society 427 (1): 343–57, doi:10.1111/j.1365-2966.2012.21873.x, Bibcode: 2012MNRAS.427..343M. 
  8. ↑ 8.0 8.1 8.2 8.3 Prugniel, Ph. et al. (2011), "The atmospheric parameters and spectral interpolator for the MILES stars", Astronomy & Astrophysics 531: 25, doi:10.1051/0004-6361/201116769, A165, Bibcode: 2011A&A...531A.165P. 
  9. ↑ 9.0 9.1 Jasniewicz, G. et al. (July 2006), "Lithium abundances for early F stars: new observational constraints for the Li dilution", Astronomy and Astrophysics 453 (2): 717–722, doi:10.1051/0004-6361:20054421, Bibcode: 2006A&A...453..717J. 
  10. ↑ "del01 CMi". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=del01+CMi. 
  11. ↑ 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. 

External links



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