HD 201647

Last updated
HD 201647
Microscopium constellation map.svg
Red circle.svg
Location of HD 201647 on the map (circled)
Observation data
Epoch J2000       Equinox J2000
Constellation Microscopium [1]
Right ascension 21h 12m 13.71281s [2]
Declination −40° 16′ 09.7010″ [2]
Apparent magnitude  (V)5.83 [3] (5.83 - 5.86) [4]
Characteristics
Evolutionary stage main sequence [2]
Spectral type F5 V [5] [6]
B−V color index +0.45 [3]
Variable type suspected [4]
Astrometry
Radial velocity (Rv)4.5±0.9 [7] km/s
Proper motion (μ)RA: +58.359 mas/yr [2]
Dec.: −218.773 mas/yr [2]
Parallax (π)31.4586±0.0401  mas [2]
Distance 103.7 ± 0.1  ly
(31.79 ± 0.04  pc)
Absolute magnitude  (MV)+3.33 [1]
Details
Mass 1.28 [8]   M☉
Radius 1.47+0.07
−0.04 [9]   R☉
Luminosity 3.79±0.01 [2]   L☉
Surface gravity (log g)4.21±0.01 [10]   cgs
Temperature 6,637±80 [11]   K
Metallicity [Fe/H]+0.06±0.01 [12]   dex
Rotational velocity (v sin i)25.1±2.5 [13]  km/s
Age 916 [8]   Myr
Other designations
55 G. Microscopii [14] , NSV 25506, CD−40°14216, CPD−40°9488, GC 29614, GJ 9726, HD 201647, HIP 104680, HR 8100, SAO 230575, LTT 8410, TIC 159670453 [15]
Database references
SIMBAD data

HD 201647 (HR 8100; Gliese 9726; LTT 8410) is a solitary star [16] located in the southern constellation of Microscopium. It is faintly visible to the naked eye as a yellowish-white-hued star with an apparent magnitude of 5.83. [3] The object is located relatively close at a distance of light-years based on Gaia DR3 parallax measurements, but it is receding with a heliocentric radial velocity of 4.5  km/s . [7] At its current distance, HD 201647's brightness is diminished by 0.11 magnitudes due to interstellar extinction [17] and it has an absolute magnitude of +3.33. [1] It has a relatively high proper motion across the celestial sphere, moving at a rate of 226.331 mas/yr. [18]

HD 201647 has a stellar classification of F5 V, [6] [5] indicating that it is an ordinary F-type main-sequence star that is generating energy via hydrogen fusion at its core. It has 1.28 times the mass of the Sun [8] and 1.47 times the radius of the Sun. [9] It radiates 3.79 times the luminosity of the Sun [2] from its photosphere at an effective temperature of 6,637  K . [11] HD 201647 is slightly metal enriched with an iron abundance of [Fe/H] = +0.06 or 115% of the Sun's. [12] It is estimated to be 916 million years old [8] and it spins modestly with a projected rotational velocity of 25.1  km/s . [13]

In the discovery paper for Lacaille 8760, HD 201647 was reported to be a variable star that varied between 5.83 and 5.86 in the visual passband. [4] As of 2004 however, it has not been confirmed to be variable. [19]

References

  1. 1 2 3 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters . 38 (5): 331. arXiv: 1108.4971 . Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. XHIP record for this object at VizieR.
  2. 1 2 3 4 5 6 7 8 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.
  3. 1 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.
  4. 1 2 3 Byrne, Patrick B. (June 1981). "Gliese 825 – a new flare star". Monthly Notices of the Royal Astronomical Society. 195 (2). Oxford University Press (OUP): 143–147. Bibcode:1981MNRAS.195..143B. doi: 10.1093/mnras/195.2.143 . ISSN   0035-8711. S2CID   123025779.
  5. 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.
  6. 1 2 Adams, Walter S.; Joy, Alfred H.; Humason, Milton L.; Brayton, Ada Margaret (April 1935). "The Spectroscopic Absolute Magnitudes and Parallaxes of 4179 Stars". The Astrophysical Journal. 81: 187. Bibcode:1935ApJ....81..187A. doi: 10.1086/143628 . eISSN   1538-4357. ISSN   0004-637X. S2CID   121056016.
  7. 1 2 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. arXiv: 1606.08053 . Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. eISSN   1562-6873. ISSN   1063-7737. S2CID   119231169.
  8. 1 2 3 4 David, Trevor J.; Hillenbrand, Lynne A. (12 May 2015). "The Ages of Early-type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets". The Astrophysical Journal. 804 (2): 146. arXiv: 1501.03154 . Bibcode:2015ApJ...804..146D. doi: 10.1088/0004-637X/804/2/146 . eISSN   1538-4357. S2CID   33401607.
  9. 1 2 Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv: 1905.10694 . Bibcode:2019AJ....158..138S. doi: 10.3847/1538-3881/ab3467 . eISSN   1538-3881. hdl: 1721.1/124721 . S2CID   166227927.
  10. ↑ 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. arXiv: astro-ph/9911002 . Bibcode:1999A&A...352..555A. ISSN   0004-6361. S2CID   13365201.
  11. 1 2 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. arXiv: 1103.4651 . Bibcode:2011A&A...530A.138C. doi: 10.1051/0004-6361/201016276 . eISSN   1432-0746. ISSN   0004-6361. S2CID   56118016.
  12. 1 2 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. arXiv: 1705.00883 . Bibcode:2017MNRAS.469.3042N. doi: 10.1093/mnras/stx1077 . eISSN   1365-2966. ISSN   0035-8711. S2CID   119034918.
  13. 1 2 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. arXiv: 1312.3474 . Bibcode:2014A&A...561A.126D. doi: 10.1051/0004-6361/201220762 . eISSN   1432-0746. ISSN   0004-6361. S2CID   54046583.
  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 201647". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved October 14, 2023.
  16. ↑ Eggleton, P. P.; Tokovinin, A. A. (11 September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv: 0806.2878 . Bibcode:2008MNRAS.389..869E. doi: 10.1111/j.1365-2966.2008.13596.x . eISSN   1365-2966. ISSN   0035-8711. S2CID   14878976.
  17. ↑ 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.
  18. ↑ 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.
  19. ↑ Samus, N. N.; Durlevich, O. V. (November 2004). "VizieR Online Data Catalog: Combined General Catalogue of Variable Stars (Samus+ 2004)". VizieR Online Data Catalog: II/250. Bibcode:2004yCat.2250....0S.
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