56 Orionis

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56 Orionis
Orion constellation map.svg
Red circle.svg
Location of 56 Orionis (circled)
Observation data
Epoch J2000       Equinox J2000
Constellation Orion
Right ascension 05h 52m 26.43865s [1]
Declination +01° 51′ 18.5021″ [1]
Apparent magnitude  (V)4.76 [2] (4.73 to 4.78) [3]
Characteristics
Spectral type K2-IIb [4]
U−B color index +1.46 [5]
B−V color index +1.382±0.005 [2]
Astrometry
Radial velocity (Rv)+11.27±0.14 [1]  km/s
Proper motion (μ)RA: –6.942 [1]   mas/yr
Dec.: –8.355 [1]   mas/yr
Parallax (π)2.8794 ± 0.1854  mas [1]
Distance 1,130 ± 70  ly
(350 ± 20  pc)
Absolute magnitude  (MV)−3.14 [2]
Details
Mass 6.4±0.7 [6]   M☉
Radius 92.21+4.27
−6.72 [1]   R☉
Luminosity 2,547±187 [1]   L☉
Surface gravity (log g)0.91 [7]   cgs
Temperature 4,270+165
−96 [1]   K
Metallicity [Fe/H]−0.07 [7]   dex
Rotational velocity (v sin i)3.5 [8]  km/s
Age 60.7±18.4 [6]   Myr
Other designations
56 Ori, NSV  2690, BD+01°1151, FK5  2444, GC  7380, HD  39400, HIP  27750, HR  2037, SAO  113220, CCDM J05524+0151, WDS 05524+0151 [9]
Database references
SIMBAD data

56 Orionis is a single, [10] variable star in the equatorial constellation of Orion. It has an orange hue and is faintly visible to the naked eye with an apparent visual magnitude that fluctuates around 4.76. [2] The star is located at a distance of approximately 1,130 [1]   light years from the Sun based on parallax. [1] It is drifting further away with a radial velocity of +11 km/s. [1] The star has a peculiar velocity of 19.0+2.9
−3.1 km/s relative to its neighbors, and may be a runaway star. [6]

This object is a bright giant star with a stellar classification of K2-IIb. [4] It is a suspected variable star of unknown type with a brightness that has been measured varying from 4.73 down to 4.78. [3] The star is about 61 [6]  million years old with 6.4 [6] times the mass of the Sun and is spinning with a projected rotational velocity of 3.5. [8] Having exhausted the supply of hydrogen at its core, the star has expanded to 92 [1] times the radius of the Sun. It is radiating 2,547 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,270 K. [1]

It has one reported visual companion, designated component B, with magnitude 13.5 and angular separation 42.9″ . [11]

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<span class="mw-page-title-main">29 Persei</span> Star in the constellation Perseus

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<span class="mw-page-title-main">31 Persei</span> Star in the constellation Perseus

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References

  1. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 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. 1 2 3 4 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. S2CID   119257644. Vizier catalog entry
  3. 1 2 Samus, N. N.; Kazarovets, E. V.; et al. (2017). "General Catalogue of Variable Stars". Astronomy Reports. 61 (1) (5.1 ed.): 80–88. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085. S2CID   125853869 . Retrieved 2019-11-23.
  4. 1 2 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.
  5. ↑ Mallama, A. (2014). "Sloan Magnitudes for the Brightest Stars". The Journal of the American Association of Variable Star Observers. 42 (2): 443. Bibcode:2014JAVSO..42..443M. Vizier catalog entry
  6. 1 2 3 4 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 . S2CID   118629873.
  7. 1 2 Earle Luck, R. (2014). "Parameters and Abundances in Luminous Stars". The Astronomical Journal. 147 (6): 137. Bibcode:2014AJ....147..137L. doi: 10.1088/0004-6256/147/6/137 .
  8. 1 2 De Medeiros, J. R.; Mayor, M. (1999). "A catalog of rotational and radial velocities for evolved stars". Astronomy and Astrophysics Supplement Series. 139 (3): 433. arXiv: astro-ph/0608248 . Bibcode:1999A&AS..139..433D. doi:10.1051/aas:1999401. Vizier catalog entry
  9. ↑ "56 Ori". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2019-11-22.
  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. arXiv: 0806.2878 . Bibcode:2008MNRAS.389..869E. doi: 10.1111/j.1365-2966.2008.13596.x . S2CID   14878976.
  11. ↑ Mason, Brian D.; et al. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466. Bibcode:2001AJ....122.3466M. doi: 10.1086/323920 . Vizier catalog entry
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