HD 168871

HD 168871
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Telescopium
Right ascension 18h 24m 33.13773s[1]
Declination −49° 39′ 10.3588″[1]
Apparent magnitude (V) 6.45±0.01[2]
Characteristics
Spectral type G1/2 V[3] or G0- V[4]
U−B color index +0.05[5]
B−V color index +0.58[5]
Astrometry
Radial velocity (Rv)+35.10±0.69[6] km/s
Proper motion (μ) RA: +32.659 mas/yr[1]
Dec.: −149.822 mas/yr[1]
Parallax (π)36.5735 ± 0.0221 mas[1]
Distance89.18 ± 0.05 ly
(27.34 ± 0.02 pc)
Absolute magnitude (MV)+4.19[7]
Details
Mass1.03±0.03[8] M☉
Radius1.25±0.03[9] R☉
Luminosity1.659+0.005
−0.006[1] L☉
Surface gravity (log g)4.23±0.04[10] cgs
Temperature5994±29[11] K
Metallicity [Fe/H]−0.09±0.01[12] dex
Rotational velocity (v sin i)3.1[11] km/s
Age6.05±1.40[13] Gyr
Other designations
9 G. Telescopii[14], CD−49 12105, CPD−49 10555, GC 29505, HD 168871, HIP 90223, SAO 228983, TIC 160991902[15]
Database references
SIMBADdata

HD 168871 (HIP 90223; 9 G. Telescopii) is a star located in the southern constellation Telescopium. It has an apparent magnitude of 6.45,[2] placing it near the limit for naked eye visbility. The object is located relatively close at a distance of 89.2 light-years based on Gaia DR3 parallax measurements,[1] but it is drifting away with a heliocentric radial velocity of 35.1 km/s.[6] At its current distance, HD 168871’s brightness is diminished by an interstellar extinction of 0.14 magnitudes[16] and it has a visual absolute magnitude of +4.19.[7] It has a relatively high proper motion across the celestial sphere,[17] moving at a rate of 153.34 mas/yr.[1]

HD 168871 has a stellar classification of G1/2 V,[3] indicating that it is a G-type main-sequence star with the characteristics of a G1 and G2 main sequence star. Gray et al. (2006) gives a classification of G0- V,[4] indicating that it is a slightly hotter main sequence star. It has 1.03 times the mass of the Sun[8] and 1.25 times the radius of the Sun.[9] It radiates 1.66 times the luminosity of the Sun[1] from its photosphere at an effective temperature of 5,994 K,[11] giving it a whitish-yellow hue when viewed in the night sky. HD 168871 is slightly metal deficient with an iron abundance 81.3%of the Sun's.[12] It is older than the Sun at the age of 6.05 billion years[13] and it spins slowly with a projected rotational velocity of 3.1 km/s,[11] which is slightly faster than the Sun's rotational velocity of 2 km/s.

References

  1. ^ a b c d e f g h Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  2. ^ a b Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN 0004-6361. S2CID 17128864.
  3. ^ a b Houk, Nancy (1978). Michigan catalogue of two-dimensional spectral types for the HD stars: Declinations −53° to −40°. Vol. 2. Bibcode:1978mcts.book.....H.
  4. ^ a b 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. arXiv:astro-ph/0603770. Bibcode:2006AJ....132..161G. doi:10.1086/504637. eISSN 1538-3881. ISSN 0004-6256. S2CID 250741593.
  5. ^ a b Cousins, A. W. J. (January 1973). "UBV Photometry of Some Southern Stars (Second List)". Monthly Notes of the Astronomical Society of South Africa. 32: 11. Bibcode:1973MNSSA..32...11C. ISSN 0024-8266.
  6. ^ a b Valenti, Jeff A.; Fischer, Debra A. (July 2005). "Spectroscopic Properties of Cool Stars (SPOCS). I. 1040 F, G, and K Dwarfs from Keck, Lick, and AAT Planet Search Programs". The Astrophysical Journal Supplement Series. 159 (1): 141–166. Bibcode:2005ApJS..159..141V. doi:10.1086/430500. eISSN 1538-4365. ISSN 0067-0049. S2CID 121398064.
  7. ^ a b Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. eISSN 1562-6873. ISSN 1063-7737. S2CID 119257644.
  8. ^ a b Delgado Mena, E.; Moya, A.; Adibekyan, V.; Tsantaki, M.; González Hernández, J. I.; Israelian, G.; Davies, G. R.; Chaplin, W. J.; Sousa, S. G.; Ferreira, A. C. S.; Santos, N. C. (2019). "Abundance to age ratios in the HARPS-GTO sample with Gaia DR2: Chemical clocks for a range of [Fe/H]". Astronomy & Astrophysics. 624: A78. arXiv:1902.02127. Bibcode:2019A&A...624A..78D. doi:10.1051/0004-6361/201834783. ISSN 0004-6361. S2CID 90259810.
  9. ^ a b Masana, E.; Jordi, C.; Ribas, I. (10 April 2006). "Effective temperature scale and bolometric corrections from 2MASS photometry". Astronomy & Astrophysics. 450 (2): 735–746. arXiv:astro-ph/0601049. Bibcode:2006A&A...450..735M. doi:10.1051/0004-6361:20054021. eISSN 1432-0746. ISSN 0004-6361. S2CID 15278668.
  10. ^ Ramírez, I.; Fish, J. R.; Lambert, D. L.; Allende Prieto, C. (13 August 2012). "Lithium Abundances in nearby FGK Dwarf and Subgiant Stars: Internal Destruction, Galactic Chemical Evolution, and Exoplanets". The Astrophysical Journal. 756 (1): 46. arXiv:1207.0499. Bibcode:2012ApJ...756...46R. doi:10.1088/0004-637X/756/1/46. eISSN 1538-4357. ISSN 0004-637X. S2CID 119199829.
  11. ^ a b c d Luck, R. Earle (13 February 2018). "Abundances in the Local Region. III. Southern F, G, and K Dwarfs". The Astronomical Journal. 155 (3): 111. Bibcode:2018AJ....155..111L. doi:10.3847/1538-3881/aaa9b5. eISSN 1538-3881. S2CID 125765376.
  12. ^ a b Gomes da Silva, J.; Santos, N. C.; Boisse, I.; Dumusque, X.; Lovis, C. (June 2014). "On the long-term correlation between the flux in the Ca ii H & K and H α lines for FGK stars". Astronomy & Astrophysics. 566: A66. arXiv:1311.6642. Bibcode:2014A&A...566A..66G. doi:10.1051/0004-6361/201322697. ISSN 0004-6361. S2CID 54744936.
  13. ^ a b Gomes da Silva, J.; Santos, N. C.; Adibekyan, V.; Sousa, S. G.; Campante, T. L.; Figueira, P.; Bossini, D.; Delgado-Mena, E.; Monteiro, M. J. P. F. G.; de Laverny, P.; Recio-Blanco, A.; Lovis, C. (February 2021). "Stellar chromospheric activity of 1674 FGK stars from the AMBRE-HARPS sample. I. A catalogue of homogeneous chromospheric activity". Astronomy & Astrophysics. 646: A77. arXiv:2012.10199. Bibcode:2021A&A...646A..77G. doi:10.1051/0004-6361/202039765. eISSN 1432-0746. ISSN 0004-6361. S2CID 229331727.
  14. ^ Gould, Benjamin Apthorp (1878). "Uranometria Argentina : brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral : con atlas". Resultados del Observatorio Nacional Argentino. 1. Bibcode:1879RNAO....1.....G.
  15. ^ "HD 168871". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved September 6, 2024.
  16. ^ 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. arXiv:1709.01160. Bibcode:2017MNRAS.472.3805G. doi:10.1093/mnras/stx2219. eISSN 1365-2966. ISSN 0035-8711. S2CID 118879856.
  17. ^ Knapp, Wilfried; Nanson, John (January 2019). "A Catalog of High Proper Motion Stars in the Southern Sky (HPMS3 Catalog)". Journal of Double Star Observations. 15 (1): 21–41. Bibcode:2019JDSO...15...21K.