Open Access Articles- Top Results for 38 Aquarii

38 Aquarii

<tr><th style="background-color: #FFFFC0; text-align: center;" colspan="2">Astrometry</th></tr></th></tr><tr><th colspan="2" style="text-align: center"></tr><tr style="vertical-align:top;"><td>Radial velocity (Rv)</td><td>+1.5[2] km/s</td></tr><tr style="vertical-align:top;"><td>Proper motion (μ)</td><td> RA: +29.29[1] mas/yr
Dec.: +8.76[1] mas/yr </td></tr><tr style="vertical-align:top;"><td>Parallax (π)</td><td>7.25 ± 0.33[1]mas</td></tr><tr style="vertical-align:top;"><td>Distance</td><td>450 ± 20 ly
(138 ± 6 pc)</td></tr><tr><th colspan="2" style="text-align: center"></th></tr> <tr><th style="background-color: #FFFFC0; text-align: center;" colspan="2">Details</th></tr></th></tr><tr><th colspan="2" style="text-align: center"></th></tr><tr style="vertical-align:baseline;"><td>Radius</td><td>5.6[5] R</td></tr><tr style="vertical-align:baseline;"><td>Surface gravity (log g)</td><td>4.00[3] cgs</td></tr><tr style="vertical-align:baseline;"><td>Temperature</td><td>13,860[3] K</td></tr><tr style="vertical-align:baseline;"><td>Metallicity [Fe/H]</td><td>–0.26[3] dex</td></tr><tr style="vertical-align:baseline;"><td>Rotational velocity (v sin i)</td><td>20[6] km/s</td></tr><tr><th colspan="2" style="text-align: center"></th></tr> <tr><th style="background-color: #FFFFC0; text-align: center;" colspan="2">Other designations</th></tr><tr><td colspan="2">
38 Aqr, e Aqr, BD–12 6196, FK5 3771, HD 210424, HIP 109472, HR 8452, SAO 164910.[7]
38 Aquarii <tr><td colspan="2" style="text-align:center;">

Location of 38 Aquarii (circled)

Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Aquarius
Right ascension 22h 10m 37.48206s[1]
Declination –11° 33′ 53.7754″[1]
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This page is a soft redirect. Apparent magnitude (V)

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This page is a soft redirect. B5 III[3]

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38 Aquarii (e Aquarii, e Aqr, 38 Aqr) is the Flamsteed designation for a star in the equatorial constellation of Aquarius. It is a faint star but visible to the naked eye, with an apparent visual magnitude of +5.43.[2] The distance to this star, based upon parallax measurements, is around Script error: No such module "convert"..[1]

The spectrum of 38 Aquarii matches a stellar classification of B5 III.[3] A luminosity class of III indicates that this is an evolved giant star. It has 5.6[5] times the radius of the Sun and is spinning with a projected rotational velocity of 20 km/s.[6] The outer atmosphere of the star has a blue-white glow from an effective temperature of 13,860 K.[3]


  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, Bibcode:2007A&A...474..653V, arXiv:0708.1752, doi:10.1051/0004-6361:20078357. 
  2. ^ a b c 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. 
  3. ^ a b c d e f Cenarro, A. J. et al. (January 2007), "Medium-resolution Isaac Newton Telescope library of empirical spectra - II. The stellar atmospheric parameters", Monthly Notices of the Royal Astronomical Society 374 (2): 664–690, Bibcode:2007MNRAS.374..664C, arXiv:astro-ph/0611618, doi:10.1111/j.1365-2966.2006.11196.x. 
  4. ^ Corben, P. M.; Stoy, R. H. (1968), "Photoelectric Magnitudes and Colours for Bright Southern Stars", Monthly Notes of the Astronomical Society of Southern Africa 27: 11, Bibcode:1968MNSSA..27...11C. 
  5. ^ a b Pasinetti Fracassini, L. E. et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics", Astronomy and Astrophysics 367 (2): 521–524, Bibcode:2001A&A...367..521P, arXiv:astro-ph/0012289, doi:10.1051/0004-6361:20000451. 
  6. ^ a b Abt, Helmut A.; Levato, Hugo; Grosso, Monica (July 2002), "Rotational Velocities of B Stars", The Astrophysical Journal 573 (1): 359–365, Bibcode:2002ApJ...573..359A, doi:10.1086/340590. 
  7. ^ "e Aqr -- Star", SIMBAD Astronomical Object Database (Centre de Données astronomiques de Strasbourg), 6 April 2013, retrieved 2013-05-06