Nu Aquarii

Nu Aquarii
	Die ligging van Nu Aquarii (in die rooi sirkel).
Sterrebeeld	Waterdraer
Spektraaltipe	G8 III
Soort	Reusester
	Waarnemingsdata (Epog J2000)
Regte klimming	21h 09m 35.64888s
Deklinasie	-11° 22′ 18.0851″
Skynmagnitude (m)	4,52
Absolute magnitude (M)	+0,93
B-V-kleurindeks	+0,94
U-B-kleurindeks	+0,66
	Besonderhede
Massa (M☉)	2,35
Radius (R☉)	8
Ligsterkte (L☉)	37
Ouderdom (jaar)	708 miljoen
Temperatuur (K)	4 920
	Ander name
	Albulaan, 13 Aquarii, BD–11 5538, HD 201381, HIP 104459, HR 8093, SAO 164182
Portaal	Sterrekunde

Nu Aquarii (afgekort as ν Aqr) is ’n ster in die sterrebeeld Waterdraer (Aquarius). Dit deel die tradisionele naam Albulaan met Mu Aquarii. Dit kom van die Arabiese term al-bula^cān (ألبولعان), "die twee slukkers". Die ster was saam met ε Aqr (Albali) en μ Aqr (Albulaan) bekend as al Bulaʽ (البلع), die Slukker.^[7]

Eienskappe

Die ster is sowat 159 ligjare van die Son af geleë en met ’n skynbare magnitude van 4,52^[3] is dit met die blote oog sigbaar.

Teen ’n geraamde ouderdom van 708 miljoen jaar^[4] het dit ontwikkel tot ’n reusester met ’n sterreklassifikasie van G8 III.^[1] Sy massa is twee keer dié van die Son^[4] en sy radius agt keer die Son s'n.^[5] Die ligsterkte vanaf sy buitenste atmosfeer is 37 keer dié van die Son,^[5] met ’n effektiewe temperatuur van 4 920 K.^[5] Dit gee die ster die geel skynsel van ’n G-tipe ster.

Verwysings

↑ ^1,0 ^1,1 Buscombe, W. (1962), "Spectral classification of Southern fundamental stars", Mount Stromlo Observatory Mimeogram 4, Bibcode: 1962MtSOM...4....1B.
↑ ^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, Bibcode: 2007A&A...474..653V.
↑ ^3,0 ^3,1 ^3,2 ^3,3 Johnson, H. L. et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory 4 (99), Bibcode: 1966CoLPL...4...99J.
↑ ^4,0 ^4,1 ^4,2 ^4,3 ^4,4 Takeda, Yoichi; Sato, Bun'ei; Murata, Daisuke (Augustus 2008), "Stellar parameters and elemental abundances of late-G giants", Publications of the Astronomical Society of Japan 60 (4): 781–802, doi:10.1093/pasj/60.4.781, Bibcode: 2008PASJ...60..781T.
↑ ^5,0 ^5,1 ^5,2 ^5,3 ^5,4 ^5,5 Massarotti, Alessandro et al. (Januarie 2008), "Rotational and Radial Velocities for a Sample of 761 HIPPARCOS Giants and the Role of Binarity", The Astronomical Journal 135 (1): 209–231, doi:10.1088/0004-6256/135/1/209, Bibcode: 2008AJ....135..209M.
↑ "13 Aqr -- Star", SIMBAD Astronomical Object Database (Centre de Données astronomiques de Strasbourg), http://simbad.u-strasbg.fr/simbad/sim-id?Ident=13+Aquarii, besoek op 2012-07-02.
↑ Davis Jr., G. A. (Oktober 1944), "The Pronunciations, Derivations, and Meanings of a Selected List of Star Names", Popular Astronomy 52 (3): 12, Bibcode: 1944PA.....52....8D.

Eksterne skakels

Foto van Nu Aquarii
Nu Aquarii op WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Artikels en foto's
Hierdie artikel is vertaal uit die Engelse Wikipedia

[msom1962-1] 1,0 ^1,1 Buscombe, W. (1962), "Spectral classification of Southern fundamental stars", Mount Stromlo Observatory Mimeogram 4, Bibcode: 1962MtSOM...4....1B.

[aaa474_2_653-2] 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, Bibcode: 2007A&A...474..653V.

[clpl4_99-3] 3,0 ^3,1 ^3,2 ^3,3 Johnson, H. L. et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory 4 (99), Bibcode: 1966CoLPL...4...99J.

[pasj60_4_781-4] 4,0 ^4,1 ^4,2 ^4,3 ^4,4 Takeda, Yoichi; Sato, Bun'ei; Murata, Daisuke (Augustus 2008), "Stellar parameters and elemental abundances of late-G giants", Publications of the Astronomical Society of Japan 60 (4): 781–802, doi:10.1093/pasj/60.4.781, Bibcode: 2008PASJ...60..781T.

[aj135_1_209-5] 5,0 ^5,1 ^5,2 ^5,3 ^5,4 ^5,5 Massarotti, Alessandro et al. (Januarie 2008), "Rotational and Radial Velocities for a Sample of 761 HIPPARCOS Giants and the Role of Binarity", The Astronomical Journal 135 (1): 209–231, doi:10.1088/0004-6256/135/1/209, Bibcode: 2008AJ....135..209M.

[SIMBAD-6] "13 Aqr -- Star", SIMBAD Astronomical Object Database (Centre de Données astronomiques de Strasbourg), http://simbad.u-strasbg.fr/simbad/sim-id?Ident=13+Aquarii, besoek op 2012-07-02.

[davis_jr1944-7] Davis Jr., G. A. (Oktober 1944), "The Pronunciations, Derivations, and Meanings of a Selected List of Star Names", Popular Astronomy 52 (3): 12, Bibcode: 1944PA.....52....8D.

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