Astronomy:Delta3 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.
δ3 Canis Minoris
Location of δ3 Canis Minoris (circled)
Observation data
Equinox J2000.0]] (ICRS)
Constellation Canis Minor
Right ascension  07h 34m 15.893s[1]
Declination +03° 22′ 18.21″[1]
Apparent magnitude (V) +5.81[2]
Characteristics
Evolutionary stage main sequence[3]
Spectral type B9 V[4]
U−B color index −0.09[2]
B−V color index −0.02[2]
Astrometry
Radial velocity (Rv)33.8±2.9[5] km/s
Proper motion (μ) RA: −2.534[1] mas/yr
Dec.: −5.305[1] mas/yr
Parallax (π)4.603 ± 0.0452[1] mas
Distance709 ± 7 ly
(217 ± 2 pc)
Absolute magnitude (MV)+0.77[6]
Details
Mass3.16±0.09[3] M☉
Radius5.3[7] R☉
Luminosity175[3] L☉
Surface gravity (log g)4.0[8] cgs
Temperature9,500[8] K
Rotational velocity (v sin i)259[3] km/s
Age108[8] Myr
Other designations
δ3 CMi, 9 CMi, BD+03°1719, GC 10128, HD 60357, HIP 36812, HR 2901, SAO 115644, CCDM 07343+0322, WDS J07343+0322A[9]
Database references
SIMBADdata

Delta3 Canis Minoris is a solitary,[10] white-hued star in the equatorial constellation of Canis Minor. Its name is a Bayer designation that is Latinized from δ3 Canis Minoris, and abbreviated Delta3 CMi or δ3 CMi. With an apparent visual magnitude of +5.81,[2] it is just bright enough to be faintly visible to the naked eye. Based upon a parallax of 4.60 mas as seen from Gaia spacecraft,[1] this star is about 730 light years away from the Solar System. At that distance, the visual magnitude of these stars is diminished by an extinction of more than 0.15 due to interstellar dust.[6] It is drifting further away with a line of sight velocity of 34 km/s.[5]

This is a B-type main-sequence star with a stellar classification of B9 V.[4] At the estimated age of 310 million years,[6] it is about 93.7%±2.9% of the way through its main sequence lifetime and is spinning rapidly with a projected rotational velocity of 259 km/s.[3] The star has an estimated 3.16[3] times the mass of the Sun and about five times the Sun's radius.[7] It is radiating 175 times the Sun's luminosity[3] from its photosphere at an effective temperature of 9,500 K.[8]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940.  Gaia DR3 record for this source at VizieR.
  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, Bibcode: 1966CoLPL...4...99J. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 Zorec, J.; Royer, F. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics 537: A120, doi:10.1051/0004-6361/201117691, Bibcode: 2012A&A...537A.120Z. 
  4. ↑ 4.0 4.1 Houk, N.; Swift, C. (1999), "Michigan catalogue of two-dimensional spectral types for the HD Stars", Michigan Spectral Survey 5, Bibcode: 1999MSS...C05....0H. 
  5. ↑ 5.0 5.1 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. ↑ 6.0 6.1 6.2 Gontcharov, G. A. (November 2012), "Spatial distribution and kinematics of OB stars", Astronomy Letters 38 (11): 694–706, doi:10.1134/S1063773712110035, Bibcode: 2012AstL...38..694G. 
  7. ↑ 7.0 7.1 Stassun, Keivan G. et al. (2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. Bibcode: 2019AJ....158..138S. 
  8. ↑ 8.0 8.1 8.2 8.3 Gullikson, Kevin; Kraus, Adam; Dodson-Robinson, Sarah (2016). "The Close Companion Mass-ratio Distribution of Intermediate-mass Stars". The Astronomical Journal 152 (2): 40. doi:10.3847/0004-6256/152/2/40. Bibcode: 2016AJ....152...40G. 
  9. ↑ "del03 CMi". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=del03+CMi. 
  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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E. 



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