44 Aquarii

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44 Aquarii
Observation data
Epoch J2000      Equinox J2000
Constellation Andromeda
Right ascension 22h 17m 06.49866s[1]
Declination –05° 23′ 13.7972″[1]
Apparent magnitude (V) 5.75[2]
Spectral type G6 III[3]
U−B color index +0.51[2]
B−V color index +0.88[2]
Radial velocity (Rv) +7.4[4] km/s
Proper motion (μ) RA: –6.05[1] mas/yr
Dec.: +18.67[1] mas/yr
Parallax (π) 10.55 ± 0.41[1] mas
Distance 310 ± 10 ly
(95 ± 4 pc)
Absolute magnitude (MV) +0.51[3]
Mass 2.53[3] M
Luminosity 62[3] L
Surface gravity (log g) 2.70[5] cgs
Temperature 5,025[5] K
Metallicity [Fe/H] –0.31[5] dex
Age 537[3] Myr
Other designations
BD–06 5960, FK5 3782, HD 211434, HIP 110023, HR 8504, SAO 145993.[6]

44 Aquarii (abbreviated 44 Aqr) is a star in the equatorial constellation of Aquarius. 44 Aquarii is its Flamsteed designation. It has an apparent visual magnitude of 5.75[2] and is around 310 light-years (95 parsecs) from Earth.[1] A stellar classification of G6 III[3] indicates this is an evolved giant star. It has about 2.53 times the mass of the Sun and is radiation 62[3] times the Sun's luminosity from its outer atmosphere at an effective temperature of 5,025 K.[5] At this heat, the star has the golden-hued glow of a G-type star.


  1. ^ a b c d e f van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752free to read, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357. 
  2. ^ a b c d 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. 
  3. ^ a b c d e f g Takeda, Yoichi; Sato, Bun'ei; Murata, Daisuke (August 2008), "Stellar Parameters and Elemental Abundances of Late-G Giants", Publications of the Astronomical Society of Japan, 60 (4): 781–802, arXiv:0805.2434free to read, Bibcode:2008PASJ...60..781T, doi:10.1093/pasj/60.4.781. 
  4. ^ Wielen, R.; et al. (1999), Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions (35), Astronomisches Rechen-Institut Heidelberg, Bibcode:1999VeARI..35....1W. 
  5. ^ a b c d Soubiran, C.; et al. (June 2010), "The PASTEL catalogue of stellar parameters", Astronomy and Astrophysics, 515: A111, arXiv:1004.1069free to read, Bibcode:2010A&A...515A.111S, doi:10.1051/0004-6361/201014247. 
  6. ^ "44 Aqr -- Variable Star", SIMBAD Astronomical Object Database, Centre de Données astronomiques de Strasbourg, retrieved 2012-07-16 

External links[edit]