Iota Aquarii

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Iota Aquarii
Emoji u2b55.svg
Ligging van ι Aquarii (in die rooi sirkel).
Ligging van ι Aquarii (in die rooi sirkel).
Sterrebeeld Waterdraer
Spektraaltipe B8V[1]
Waarnemingsdata (Epog J2000)
Regte klimming 22h 06m 26.22742s[2]
Deklinasie –13° 52′ 10.8615″[2]
Skynmagnitude (m) 4,279[3]
Absolute magnitude (M) +0,64[4]
B-V-kleurindeks  -0,062[3]
U-B-kleurindeks  -0,288[3]
Besonderhede
Radius (R) 2,7[5]
Ligsterkte (L) 74[4]
Ouderdom (jaar) 30-60 miljoen[6]
Temperatuur (K) 11 284 ± 284[5]
Rotasiespoed (km/s) 135[7]
Metaalinhoud [Fe/H] -0,08 ± 0,12[8]
Ander name
ι Aqr, 33 Aquarii, BD-14 6209, FK5 828, HD 209819, HIP 109139, HR 8418, SAO 164861[9]
Portaal  Portaalicoon   Sterrekunde

Iota Aquarii of ι Aquarii is die Bayer-naam van ’n ster in die sterrebeeld Waterdraer. Met ’n skynbare magnitude van 4,279 is dit met die blote oog sigbaar.[3] Volgens parallaksmetings deur die Hipparcos-sending is dit sowat 175 ligjare van die Son af.[3]

Die ster se spektrum stem ooreen met ’n sterreklassifikasie van B8V,[1] wat beteken dit moet ’n B-tipe hoofreeksster wees. Sy radius is 2,7 keer dié van die Son[5] en dit roteer vinnig, met ’n spoed van sowat 135 km/s.[7] ’n Infrarooisoektog in 2010 na metgeselle om die ster was onsuksesvol.[6]

Verwysings[wysig | wysig bron]

  1. 1,0 1,1 Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, 4, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode1988mcts.book.....H. 
  2. 2,0 2,1 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode2007A&A...474..653V. 
  3. 3,0 3,1 3,2 3,3 3,4 Kozok, J. R. (September 1985), "Photometric observations of emission B-stars in the southern Milky Way", Astronomy and Astrophysics Supplement Series 61: 387–405, Bibcode1985A&AS...61..387K. 
  4. 4,0 4,1 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode2012AstL...38..331A. 
  5. 5,0 5,1 5,2 Underhill, A. B. et al. (November 1979), "Effective temperatures, angular diameters, distances and linear radii for 160 O and B stars", Monthly Notices of the Royal Astronomical Society 189: 601–605, doi:10.1093/mnras/189.3.601, Bibcode1979MNRAS.189..601U. 
  6. 6,0 6,1 Ehrenreich, D. et al. (November 2010), "Deep infrared imaging of close companions to austral A- and F-type stars", Astronomy and Astrophysics 523: A73, doi:10.1051/0004-6361/201014763, Bibcode2010A&A...523A..73E. 
  7. 7,0 7,1 Abt, Helmut A.; Levato, Hugo; Grosso, Monica (July 2002), "Rotational Velocities of B Stars", The Astrophysical Journal 573 (1): 359–365, doi:10.1086/340590, Bibcode2002ApJ...573..359A. 
  8. Wu, Yue et al. (Januarie 2011), "Coudé-feed stellar spectral library - atmospheric parameters", Astronomy and Astrophysics 525: A71, doi:10.1051/0004-6361/201015014, Bibcode2011A&A...525A..71W. 
  9. Iota Aquarii by Simbad, besoek op 6 September 2020


Skakels[wysig | wysig bron]