Delta1 Canis Minoris

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.

For other stars with this Bayer designation, see δ Canis Minoris.
δ1 Canis Minoris
Location of δ1 Canis Minoris (circled)
Observation data
Epoch J2000.0      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

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. 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. Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99), Bibcode:1966CoLPL...4...99J.
  3. 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. 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.
  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, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, A61.
  6. 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.
  7. McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x.
  8. Prugniel, Ph.; et al. (2011), "The atmospheric parameters and spectral interpolator for the MILES stars", Astronomy & Astrophysics, 531: 25, arXiv:1104.4952, Bibcode:2011A&A...531A.165P, doi:10.1051/0004-6361/201116769, A165.
  9. 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, Bibcode:2006A&A...453..717J, doi:10.1051/0004-6361:20054421.
  10. "del01 CMi". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-09-03.
  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, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x.
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