Astronomy:HD 192886

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Short description: High proper motion star; F-type dwarf
HD 192886
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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