HD 56577

HD 56577 or 145 Canis Majoris is a single[8] K giant or supergiant star in the southern constellation of Canis Major. Its apparent magnitude is 4.84. It has a visual companion. It is often referred to as The Winter Albireo as it is quite similar in appearance to the well-known double Albireo in Cygnus.

HD 56577
Observation data
Epoch J2000      Equinox J2000
Constellation Canis Major
Right ascension 07h 16m 36.83470s[1]
Declination −23° 18′ 56.1130″[1]
Apparent magnitude (V) 4.79[2]
Characteristics
Spectral type K3Ib-[3] or K4III[4]
B−V color index 1.710[2]
Astrometry
Radial velocity (Rv)+28.05±0.42[1] km/s
Proper motion (μ) RA: −3.942[1] mas/yr
Dec.: +2.248[1] mas/yr
Parallax (π)1.4349 ± 0.1614[1] mas
Distanceapprox. 2,300 ly
(approx. 700 pc)
Details
Mass1.90[2] or 7.8±0.5[5] M☉
Radius241[1] R☉
Luminosity5,248[2] L☉
Surface gravity (log g)0.70[2] cgs
Temperature3,937±141[2] K
Metallicity [Fe/H]0.03[2] dex
Rotational velocity (v sin i)7.4±1.0[6] km/s
Age1.05 Gyr[2] or 35.4±2.0[5] Myr
Other designations
145 G. CMa, NSV 3503, CD−23°5189, HD 56577, HIP 35210, HR 2764, SAO 173349, WDS J07166-2319A[7]
Database references
SIMBADdata

References
  1. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. Luck, R. Earle (2015), "Abundances in the Local Region. I. G and K Giants", The Astronomical Journal, 150 (3): 88, arXiv:1507.01466, Bibcode:2015AJ....150...88L, doi:10.1088/0004-6256/150/3/88.
  3. Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins catalog of revised MK types for the cooler stars", Astrophysical Journal Supplement Series, 71: 245, Bibcode:1989ApJS...71..245K, doi:10.1086/191373.
  4. Houk, Nancy; Smith-Moore, M. (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, 4, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1988mcts.book.....H.
  5. Tetzlaff, N.; et al. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun", Monthly Notices of the Royal Astronomical Society, 410 (1): 190–200, arXiv:1007.4883, Bibcode:2011MNRAS.410..190T, doi:10.1111/j.1365-2966.2010.17434.x
  6. De Medeiros, J. R.; et al. (2002), "A catalog of rotational and radial velocities for evolved stars. II. Ib supergiant stars", Astronomy and Astrophysics, 395: 97, arXiv:1312.3474, Bibcode:2002A&A...395...97D, doi:10.1051/0004-6361:20021214
  7. "HD 56577". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-01-06.
  8. 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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