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] |
| Characteristics | |
| Spectral type | G6 III[3] |
| U−B color index | +0.51[2] |
| B−V color index | +0.88[2] |
| Astrometry | |
| 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 mas[1] |
| Distance | 310 ± 10 ly (95 ± 4 pc) |
| Absolute magnitude (MV) | +0.51[3] |
| Details | |
| 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 | |
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.
References
- ^ 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:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
- ^ 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.
- ^ 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:0805.2434, Bibcode:2008PASJ...60..781T, doi:10.1093/pasj/60.4.781.
- ^ Wielen, R.; et al. (1999), Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions, Astronomisches Rechen-Institut Heidelberg, Bibcode:1999VeARI..35....1W.
- ^ a b c d Soubiran, C.; et al. (June 2010), "The PASTEL catalogue of stellar parameters", Astronomy and Astrophysics, 515: A111, arXiv:1004.1069, Bibcode:2010A&A...515A.111S, doi:10.1051/0004-6361/201014247.
- ^ "44 Aqr -- Variable Star", SIMBAD Astronomical Object Database, Centre de Données astronomiques de Strasbourg, retrieved 2012-07-16
