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Open Access Articles- Top Results for Tau2 Aquarii

Tau2 Aquarii

For other star systems with this Bayer designation, see Tau 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>+1.0[4] km/s</td></tr><tr style="vertical-align:top;"><td>Proper motion (μ)</td><td> RA: –13.71[1] mas/yr
Dec.: –39.03[1] mas/yr </td></tr><tr style="vertical-align:top;"><td>Parallax (π)</td><td>10.27 ± 0.29[1]mas</td></tr><tr style="vertical-align:top;"><td>Distance</td><td>318 ± 9 ly
(97 ± 3 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>53[5] R</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">
Tau Aquarii, 71 Aquarii, BD–14 6354, FK5 861, HD 216032, HIP 112716, HR 8679, NSV 14329, SAO 165321.[6]
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τ2 Aquarii <tr><td colspan="2" style="text-align:center;">

Location of τ1 Aquarii (circled)
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Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 22h 49m 35.50157s[1]
Declination –13° 35′ 33.4767″[1]
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This page is a soft redirect. Apparent magnitude (V)

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Characteristics
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This page is a soft redirect. K5 III[3]

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This page is a soft redirect. +1.566[2]

Tau2 Aquarii2 Aqr, τ2 Aquarii) is the Bayer designation for a star in the equatorial constellation of Aquarius. It is visible to the naked eye with an apparent visual magnitude of +4.0.[2] This is an orange-hued[7] giant star with a stellar classification of K5 III.[3] The measured angular diameter, after correction for limb darkening, is 5.12 ± 0.05 mas.[8] At an estimated distance of Script error: No such module "convert". based on parallax measurements,[1] this yields a physical size of about 53 times the radius of the Sun.[5]

References

  1. 1.0 1.1 1.2 1.3 1.4 1.5 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. 2.0 2.1 2.2 2.3 Gutierrez-Moreno, Adelina et al. (1966), A System of photometric standards 1, Publicaciones Universidad de Chile, Department de Astronomy, pp. 1–17, Bibcode:1966PDAUC...1....1G. 
  3. 3.0 3.1 Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars 4, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1988mcts.book.....H. 
  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. 5.0 5.1 Lang, Kenneth R. (2006), Astrophysical formulae, Astronomy and astrophysics library 1 (3rd ed.), Birkhäuser, ISBN 3-540-29692-1 . The radius (R*) is given by:
    <math>\begin{align} 2\cdot R_*
    & = \frac{(97\cdot 5.12\cdot 10^{-3})\ \text{AU}}{0.0046491\ \text{AU}/R_{\bigodot}} \\ & \approx 107\cdot R_{\bigodot} \end{align}</math>
  6. "tau Aqr -- Star in double system", SIMBAD (Centre de Données astronomiques de Strasbourg), retrieved 2012-02-08 
  7. "The Colour of Stars", Australia Telescope, Outreach and Education (Commonwealth Scientific and Industrial Research Organisation), December 21, 2004, retrieved 2012-01-16 
  8. Richichi, A.; Percheron, I.; Khristoforova, M. (February 2005), "CHARM2: An updated Catalog of High Angular Resolution Measurements", Astronomy and Astrophysics 431: 773–777, Bibcode:2005A&A...431..773R, doi:10.1051/0004-6361:20042039 

External links