HD 168871

HD 168871
Observation data
Epoch J2000.0      Equinox ICRS
Constellation Telescopium
Right ascension 18h 24m 33.13773s
Declination −49° 39′ 10.3588″
Apparent magnitude (V) 6.45±0.01
Characteristics
Evolutionary stage main sequence
Spectral type G1/2 V or G0- V
U−B color index +0.05
B−V color index +0.58
Astrometry
Radial velocity (Rv)+35.10±0.69 km/s
Proper motion (μ) RA: +32.659 mas/yr
Dec.: −149.822 mas/yr
Parallax (π)36.5735±0.0221 mas
Distance89.18 ± 0.05 ly
(27.34 ± 0.02 pc)
Absolute magnitude (MV)+4.19
Details
Mass1.03±0.03 M☉
Radius1.25±0.03 R☉
Luminosity1.659+0.005
−0.006 L☉
Surface gravity (log g)4.23±0.04 cgs
Temperature5994±29 K
Metallicity [Fe/H]−0.09±0.01 dex
Rotational velocity (v sin i)3.1 km/s
Age6.05±1.40 Gyr
Other designations
9 G. Telescopii, CD−49 12105, CPD−49 10555, GC 29505, HD 168871, HIP 90223, SAO 228983, TIC 160991902
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, placing it near the limit for naked eye visibility. The object is located relatively close at a distance of 89.2 light-years based on Gaia DR3 parallax measurements, but it is drifting away with a heliocentric radial velocity of 35.1 km/s. At its current distance, HD 168871’s brightness is diminished by an interstellar extinction of 0.14 magnitudes and it has a visual absolute magnitude of +4.19. It has a relatively high proper motion across the celestial sphere, moving at a rate of 153.34 mas/yr.

HD 168871 has a stellar classification of G1/2 V, 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, indicating that it is a slightly hotter main sequence star. It has 1.03 times the mass of the Sun and 1.25 times the radius of the Sun. It radiates 1.66 times the luminosity of the Sun from its photosphere at an effective temperature of 5,994 K, 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. It is older than the Sun at the age of 6.05 billion years and it spins slowly with a projected rotational velocity of 3.1 km/s, which is slightly faster than the Sun's rotational velocity of 2 km/s.

References

  1. 1 2 3 4 5 6 7 8 9 10 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. 1 2 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. 1 2 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. 1 2 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. 1 2 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. 1 2 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. 1 2 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. 1 2 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. 1 2 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. 1 2 3 4 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. 1 2 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. 1 2 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.