Astronomy:HD 192886

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Short description: High proper motion star; F-type dwarf
HD 192886
Telescopium constellation map.svg
Red circle.svg
Location of HD 192886 and HD 192827 (circled)
Observation data
Epoch J2000.0   Equinox (celestial coordinates)
Constellation Telescopium
Right ascension  20h 19m 17.85169s[1]
Declination −47° 34′ 49.0453″[1]
Apparent magnitude (V) 6.13[2]
Characteristics
Spectral type F5 V[3] or F6 IV-V[4]
U−B color index +0.01[2]
B−V color index +0.46[2]
Astrometry
Radial velocity (Rv)−29.6±0.6[5] km/s
Proper motion (μ) RA: +192.878[1] mas/yr
Dec.: −183.183[1] mas/yr
Parallax (π)31.657 ± 0.028[1] mas
Distance103.03 ± 0.09 ly
(31.59 ± 0.03 pc)
Absolute magnitude (MV)+3.69[6]
Details
Mass1.32+0.27−0.16[7] M☉
Radius1.39±0.07[8] R☉
Luminosity2.92±0.01[1] L☉
Surface gravity (log g)4.32[9] cgs
Temperature6,459±52[10] K
Metallicity [Fe/H]+0.02[11] dex
Rotational velocity (v sin i)11.6±1.1[12] km/s
Age2.23[13] Gyr
Other designations
CD−47°13340, CPD−47°9478, GC 28213, HD 192886, HIP 100184, HR 7749, SAO 230150, LTT 8083[14]
Database references
SIMBADdata

HD 192886, also known as HR 7749 or rarely 84 G. Telescopii, is a solitary, yellowish-white hued star located in the southern constellation Telescopium. It has an apparent magnitude of 6.13,[2] making it barely visible to the naked eye, even in ideal conditions. The object is located relatively close at a distance of only 103 light years[1] but is drifting closer with a heliocentric radial velocity of −29.6 km/s.[5] At its current distance, HD 192886's brightness is diminished by 0.13 magnitudes due to extinction from interstellar dust.[15] It has an absolute magnitude of +3.69.[6]

HD 192886 has a stellar classification of F5 V,[3] making it an ordinary F-type main-sequence star. However, Richard O. Gray and colleagues give it a class of F6 IV-V,[4] indicating that it is slightly cooler and more evolved. It has 1.32 times the mass of the Sun[7] and 1.39 times the Sun's radius.[8] It radiates 2.92 times the luminosity of the Sun[1] from its photosphere at an effective temperature of 6,459 K.[10] It has a solar metallicity ([Fe/H] = +0.02[11]) and is estimated to be 2.23 billion years old.[13] HD 192886 is more likely a main sequence star because it is only 0.24 magnitudes above the main sequence.[16] The star spins modestly with a projected rotational velocity of 11.6 km/s.[12]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 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.; 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. 
  3. ↑ 3.0 3.1 Houk, Nancy (1978). Michigan catalogue of two-dimensional spectral types for the HD stars: Declinations −53° to −40°. 2. Bibcode: 1978mcts.book.....H. 
  4. ↑ 4.0 4.1 Gray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. (2 June 2006). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc--The Southern Sample". The Astronomical Journal 132 (1): 161–170. doi:10.1086/504637. ISSN 0004-6256. Bibcode: 2006AJ....132..161G. 
  5. ↑ 5.0 5.1 Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35,495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. doi:10.1134/S1063773706110065. ISSN 1063-7737. Bibcode: 2006AstL...32..759G. 
  6. ↑ 6.0 6.1 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. 
  7. ↑ 7.0 7.1 Stassun, Keivan G. et al. (9 September 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 Kervella, P.; Thévenin, F.; Di Folco, E.; Ségransan, D. (October 2004). "The angular sizes of dwarf stars and subgiants". Astronomy & Astrophysics 426 (1): 297–307. doi:10.1051/0004-6361:20035930. ISSN 0004-6361. Bibcode: 2004A&A...426..297K. 
  9. ↑ Netopil, Martin (4 May 2017). "Metallicity calibrations for dwarf stars and giants in the Geneva photometric system". Monthly Notices of the Royal Astronomical Society 469 (3): 3042–3055. doi:10.1093/mnras/stx1077. ISSN 0035-8711. Bibcode: 2017MNRAS.469.3042N. 
  10. ↑ 10.0 10.1 Masana, E.; Jordi, C.; Ribas, I. (10 April 2006). "Effective temperature scale and bolometric corrections from 2MASS photometry". Astronomy & Astrophysics 450 (2): 735–746. doi:10.1051/0004-6361:20054021. ISSN 0004-6361. Bibcode: 2006A&A...450..735M. 
  11. ↑ 11.0 11.1 Casagrande, L.; Schönrich, R.; Asplund, M.; Cassisi, S.; Ramírez, I.; Meléndez, J.; Bensby, T.; Feltzing, S. (26 May 2011). "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s): Improved astrophysical parameters for the Geneva-Copenhagen Survey⋆". Astronomy & Astrophysics 530: A138. doi:10.1051/0004-6361/201016276. ISSN 0004-6361. Bibcode: 2011A&A...530A.138C. 
  12. ↑ 12.0 12.1 Groot, P. J.; Piters, A. J. M.; Paradijs, van (September 1996). "Rotational velocities of F dwarfs; application of the Fourier-Bessel transformation method.". Astronomy and Astrophysics Supplement Series 118 (3): 545–555. doi:10.1051/aas:1996214. ISSN 0365-0138. Bibcode: 1996A&AS..118..545G. 
  13. ↑ 13.0 13.1 Ibukiyama, A.; Arimoto, N. (21 October 2002). "HIPPARCOS age-metallicity relation of the solar neighbourhood disc stars". Astronomy & Astrophysics 394 (3): 927–941. doi:10.1051/0004-6361:20021157. ISSN 0004-6361. Bibcode: 2002A&A...394..927I. 
  14. ↑ "HD 192886". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+192886. 
  15. ↑ Gontcharov, George A.; Mosenkov, Aleksandr V. (28 September 2017). "Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars". Monthly Notices of the Royal Astronomical Society 472 (4): 3805–3820. doi:10.1093/mnras/stx2219. ISSN 0035-8711. Bibcode: 2017MNRAS.472.3805G. 
  16. ↑ Nordström, B.; Mayor, M.; Andersen, J.; Holmberg, J.; Pont, F.; Jørgensen, B. R.; Olsen, E. H.; Udry, S. et al. (16 April 2004). "The Geneva-Copenhagen survey of the Solar neighbourhood". Astronomy & Astrophysics 418 (3): 989–1019. doi:10.1051/0004-6361:20035959. ISSN 0004-6361. Bibcode: 2004A&A...418..989N. 
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