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14 Sagittae

14 Sagittae
Observationsdata
Epok: J2000.0
StjärnbildÖrnen
Rektascension20t 03m 30,01519s[1]
Deklination+16° 01′ 52,5065″[1]
Skenbar magnitud ()5,89,[2] 5,658 ± 0,009(V)[3]
Stjärntyp
SpektraltypB9p HgMn[4]
U–B-0,44[2]
B–V-0,095 ± 0,007[5]
Astrometri
Radialhastighet ()-21,7[6] km/s
Egenrörelse (µ)RA: +5,28 ± 0,26[7] mas/år
Dek.: -8,99 ± 0,25[7] mas/år
Parallax ()4,9142 ± 0,0849[1]
Avstånd660 ± 10  (203 ± 4 pc)
Absolut magnitud ()-0,72[8]
Detaljer
Radie2,43[9] R
Luminositet291,53[8] L
Temperatur13 200[4] K
Metallicitet0,55 ± 9,99 (Fe/H)[9] dex
Vinkelhastighet7,0 ± 0,5[10] km/s
Andra beteckningar
HD 190229[11], HIP 98754[11], HR 7664[11], SAO 105615[11], 2MASS J20033001+1601527[11], GSC 01617-00764[11], BD+15 4033[11], GC 27812[11], GCRV 12409[11], HIC 98754[11], PLX 4753[11], PLX 4753.00[11], PPM 137524[11], ROT 2902[11], TD1 25952[11], TYC 1617-764-1[11], UBV 17141[11], uvby98 100190229[11], YZ 15 7888[11], SBC9 1196[11], WEB 17493[11], Gaia DR2 1808075236135604736[11], 14 Sge, Gaia DR3 1808075236135604736[11], TIC 275128909[11], AG+15 2133[11], UBV M 24444[11], ALS 17430[11] och Renson 52840[11][3][12]

14 Sagittae, som är stjärnans Flamsteed-beteckning, är en dubbelstjärna[13] belägen i den norra delen av stjärnbilden Örnen.[14] Trots dess Flamsteed-beteckning tillhör den inte Pilens stjärnbild.[3] Den ligger på gränsen mellan stjärnbilderna och fick byta tillhörighet vid översynen av gränser mellan stjärnbilderna år 1930 och benämns efter bytet av stjärnbild ofta med sin HD-beteckning, HD 190229. Den har en skenbar magnitud på ca 5,89[2] och är mycket svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallax enligt Gaia Data Release 2 på ca 4,9[1] mas, beräknas den befinna sig på ett avstånd på ca 660 ljusår (ca 203 parsek) från solen. Den rör sig närmare solen med en heliocentrisk radialhastighet av ca -22 km/s.[6]

Egenskaper

Primärstjärnan 14 Sagittae A är en blå till vit stjärna i huvudserien av spektralklass B9p HgMn,[4] som är en kemiskt speciell kvicksilver-mangan-stjärna.[15] Den har en radie som är ca 2,4[9] solradier och utsänder ca 292[8] gånger mera energi än solen från dess fotosfär vid en effektiv temperatur av ca 13 200 K.[4]

14 Sagittae är en enkelsidig spektroskopisk dubbelstjärna med en omloppsperiod av 61,5 dygn och en excentricitet av 0,49. [13]

Referenser

Den här artikeln är helt eller delvis baserad på material från engelskspråkiga Wikipedia, 70 Aquilae, 20 februari 2021.

Noter

  1. ^ [a b c d] Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051.
  2. ^ [a b c] Fernie, J. D. (May 1983), "New UBVRI photometry for 900 supergiants", Astrophysical Journal Supplement Series, 52: 7–22, Bibcode:1983ApJS...52....7F, doi:10.1086/190856.
  3. ^ [a b c] ”Basic data: V* 14 Sge – Spectroscopic binary” (på engelska). Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=14+Sge&submit=SIMBAD+search. Läst 28 juli 2019. 
  4. ^ [a b c d] Smith, K. C.; Dworetsky, M. M. (July 1993), "Elemental Abundances in Normal Late B-Stars and Hgmn-Stars from Co-Added IUE Spectra - Part One - Iron Peak Elements", Astronomy and Astrophysics, 274 (2): 335, Bibcode:1993A&A...274..335S.
  5. ^ van Leeuwen (2007). ”Hipparcos, the New Reduction” (på engelska). http://vizier.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&HIP=98754. Läst 28 juli 2019. 
  6. ^ [a b] Wilson, Ralph Elmer (1953), General Catalogue of Stellar Radial Velocities, Washington: Carnegie Institution of Washington, Bibcode:1953GCRV..C......0W.
  7. ^ [a b] van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
  8. ^ [a b c] 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.
  9. ^ [a b c] ”14 Sagittae” (på engelska). Universe Guide. https://www.universeguide.com/star/14sagittae. Läst 28 juli 2019. 
  10. ^ Adelman, S. J.; et al. (June 2017), "Elemental abundance analyses with DAO spectrograms: XL", Astronomische Nachrichten, 338 (5): 584–597, Bibcode:2017AN....338..584A, doi:10.1002/asna.201613214.
  11. ^ [a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab] SIMBAD Astronomical Database.[källa från Wikidata]
  12. ^ "4 Aql". SIMBAD. Centre de données astronomiques de Strasbourg. Hämtad 27 oktober 2018.
  13. ^ [a b] Pourbaix, D.; et al. (2004), "SB9: The Ninth Catalogue of Spectroscopic Binary Orbits", Astronomy & Astrophysics, 424: 727–732, arXiv:astro-ph/0406573, Bibcode:2004A&A...424..727P, doi:10.1051/0004-6361:20041213.
  14. ^ Hoffleit, D.; Warren Jr., W. H. (1991), The Bright Star Catalogue (5th Revised [Preliminary Version] ed.), Astronomical Data Center, NSSDC/ADC, Bibcode:1964BS....C......0H.
  15. ^ Adelman, S. J. (December 1988), "Elemental Abundance Analyses with Coadded DAO Spectrograms - Part Five - the Mercury-Manganese Stars Phi-Herculis 28-HERCULIS and HR:7664", Monthly Notices of the Royal Astronomical Society, 235 (3): 763, Bibcode:1988MNRAS.235..763A, doi:10.1093/mnras/235.3.763.

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