Astronomy:HD 22676

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Short description: Star in the constellation Mensa
HD 22676
Observation data
Equinox J2000.0]] (ICRS)
Constellation Mensa
Right ascension  03h 29m 58.8930s[1]
Declination −78° 21′ 06.6634″[1]
Apparent magnitude (V) 5.67 ± 0.01[2]
Characteristics
Evolutionary stage Horizontal branch[3]
Spectral type G8 III[4]
U−B color index +0.65[5]
B−V color index +0.93[5]
Astrometry
Radial velocity (Rv)18.4 ± 0.1[6] km/s
Proper motion (μ) RA: −11.565[1] mas/yr
Dec.: −26.933[1] mas/yr
Parallax (π)9.8072 ± 0.0355[1] mas
Distance333 ± 1 ly
(102.0 ± 0.4 pc)
Absolute magnitude (MV)+0.72[7]
Details
Mass2.36[8] M☉
Radius9.33[9] R☉
Luminosity58.06[10] L☉
Surface gravity (log g)3.01 ± 0.09[11] cgs
Temperature5,109 ± 32[11] K
Metallicity [Fe/H]+0.06 ± 0.03[11] dex
Rotational velocity (v sin i)3.4 ± 1[12] km/s
Age750[8] Myr
Other designations
Database references
SIMBADdata

HD 22676 (HR 1109) is a solitary[13] star in the southern circumpolar constellation Mensa. It has an apparent magnitude of 5.67, making it faintly visible to the naked eye and is currently located at a distance of 333 light years. However, it is recceding from the sun with a radial velocity of 18.4 km/s.

HD 22676 has a stellar classification of G8 III,[4] which indicates that is an evolved late G-type giant star currently on the horizontal branch, specifically the red clump region.[3] At an age of 700 million years,[8] it has expanded to 9.33 times the radius of the Sun. It has 2.36[8] times the Sun's mass and radiates at approximately 58[10] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 5,109[11] K, which gives it a yellow glow. HD 22676 is slightly metal enriched with an iron abundance 115%[11] that of the Sun and spins lesuirely with a projected rotational velocity of 3.6 km/s.[12]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G.  Gaia EDR3 record for this source at VizieR.
  2. ↑ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P. et al. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27–L30. ISSN 0004-6361. Bibcode: 2000A&A...355L..27H. 
  3. ↑ 3.0 3.1 Gontcharov, G. A. (November 2008). "Red giant clump in the Tycho-2 catalogue". Astronomy Letters 34 (11): 785–796. doi:10.1134/S1063773708110078. ISSN 0004-6299. Bibcode: 2008AstL...34..785G. 
  4. ↑ 4.0 4.1 Houk, N.; Cowley, A. P. (1975). University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations -90_ to -53_ƒ0.. Bibcode: 1975mcts.book.....H. 
  5. ↑ 5.0 5.1 Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory 4: 99–110. Bibcode: 1966CoLPL...4...99J. 
  6. ↑ Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.  Gaia DR2 record for this source at VizieR.
  7. ↑ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331–346. doi:10.1134/S1063773712050015. ISSN 1063-7737. Bibcode: 2012AstL...38..331A. 
  8. ↑ 8.0 8.1 8.2 8.3 Demarque, Pierre; Woo, Jong‐Hak; Kim, Yong‐Cheol; Yi, Sukyoung K. (December 2004). "Y 2 Isochrones with an Improved Core Overshoot Treatment". The Astrophysical Journal Supplement Series 155 (2): 667–674. doi:10.1086/424966. ISSN 1538-4357. Bibcode: 2004ApJS..155..667D. 
  9. ↑ Allende Prieto, C.; Lambert, D. L. (December 1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: masses, radii and effective temperatures". Astronomy and Astrophysics 352: 555–562. ISSN 0004-6361. Bibcode: 1999A&A...352..555A. 
  10. ↑ 10.0 10.1 McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (21 November 2012). "Fundamental parameters and infrared excesses of Hipparcos stars: Parameters and IR excesses from Hipparcos". Monthly Notices of the Royal Astronomical Society 427 (1): 343–357. doi:10.1111/j.1365-2966.2012.21873.x. ISSN 0035-8711. Bibcode: 2012MNRAS.427..343M. 
  11. ↑ 11.0 11.1 11.2 11.3 11.4 Alves, S.; Benamati, L.; Santos, N. C.; Adibekyan, V. Zh.; Sousa, S. G.; Israelian, G.; De Medeiros, J. R.; Lovis, C. et al. (11 April 2015). "Determination of the spectroscopic stellar parameters for 257 field giant stars★". Monthly Notices of the Royal Astronomical Society 448 (3): 2749–2765. doi:10.1093/mnras/stv189. ISSN 0035-8711. Bibcode: 2015MNRAS.448.2749A. 
  12. ↑ 12.0 12.1 De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (January 2014). "A catalog of rotational and radial velocities for evolved stars: V. Southern stars⋆⋆⋆". Astronomy & Astrophysics 561: A126. doi:10.1051/0004-6361/201220762. ISSN 0004-6361. Bibcode: 2014A&A...561A.126D. 
  13. ↑ 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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