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Open Access Articles- Top Results for 66 Aquarii

66 Aquarii

66 Aquarii <tr><td colspan="2" style="text-align:center;">

Location of 66 Aquarii (circled)
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Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 22h 43m 35.23307s[1]
Declination –18° 49′ 49.3557″[1]
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This page is a soft redirect. Apparent magnitude (V)

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This page is a soft redirect. 4.673[2]

Characteristics
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This page is a soft redirect. Spectral type

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This page is a soft redirect. K3 III[3]

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This page is a soft redirect. U−B color index

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This page is a soft redirect. +1.549[2]

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This page is a soft redirect. B−V color index

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This page is a soft redirect. +1.376[2]

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This page is a soft redirect. suspected[4] <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>+21.6[5] km/s</td></tr><tr style="vertical-align:top;"><td>Proper motion (μ)</td><td> RA: –31.73[1] mas/yr
Dec.: –28.54[1] mas/yr </td></tr><tr style="vertical-align:top;"><td>Parallax (π)</td><td>7.53 ± 0.26[1] mas</td></tr><tr style="vertical-align:top;"><td>Distance</td><td>430 ± 10 ly
(133 ± 5 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>37[6] R</td></tr><tr style="vertical-align:baseline;"><td>Surface gravity (log g)</td><td>2.06[7] cgs</td></tr><tr style="vertical-align:baseline;"><td>Temperature</td><td>4,170[7] K</td></tr><tr style="vertical-align:baseline;"><td>Metallicity [Fe/H]</td><td>–0.23[7] dex</td></tr><tr style="vertical-align:baseline;"><td>Rotational velocity (v sin i)</td><td>10[8] 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">
g1 Aquarii, BD–19 6324, HD 215167, HIP 112211, HR 8649, SAO 165252.[9]
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66 Aquarii (g1 Aquarii[10]) is the Flamsteed designation for a star in the equatorial constellation of Aquarius. It is visible to the naked eye with an apparent visual magnitude of 4.673.[2] Based upon an annual parallax shift of 7.53 milliarcseconds,[1] the distance to this star is about Script error: No such module "convert"..

This is an evolved giant star with a stellar classification of K3 III.[3] It has expanded to 37 times the radius of the Sun[6] and is radiating energy from its outer envelope at an effective temperature of 4,170 K.[7] This gives it the orange-hued glow of a K-type star.[11] It is a suspected variable star that ranges in magnitude between 4.66 and 4.71.[4]

References

  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 d Jennens, P. A.; Helfer, H. L. (September 1975), "A new photometric metal abundance and luminosity calibration for field G and K giants.", Monthly Notices of the Royal Astronomical Society 172: 667–679, Bibcode:1975MNRAS.172..667J. 
  3. ^ a b 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. ^ a b Kazarovets, E. V.; Samus, N. N.; Durlevich, O. V. (December 1998), New Catalogue of Suspected Variable Stars. Supplement, 1.0 4655, Information Bulletin on Variable Stars, p. 1, Bibcode:1998IBVS.4655....1K 
  5. ^ Wilson, Ralph Elmer (1953), General catalogue of stellar radial velocities, Carnegie Institution of Washington, Bibcode:1953QB901.W495...... 
  6. ^ 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. 
  7. ^ a b c d McWilliam, Andrew (December 1990), "High-resolution spectroscopic survey of 671 GK giants. I - Stellar atmosphere parameters and abundances", Astrophysical Journal Supplement Series 74: 1075–1128, Bibcode:1990ApJS...74.1075M, doi:10.1086/191527. 
  8. ^ Bernacca, P. L.; Perinotto, M. (1970), "A catalogue of stellar rotational velocities", Contributi Osservatorio Astronomico di Padova in Asiago 239 (1), Bibcode:1970CoAsi.239....1B. 
  9. ^ "g Aqr -- Variable Star", SIMBAD Astronomical Object Database (Centre de Données astronomiques de Strasbourg), retrieved 2012-07-14 
  10. ^ HD 215167, database record, HD-DM-GC-HR-HIP-Bayer-Flamsteed Cross Index, N. D. Kostjuk, Institute of Astronomy of Russian Academy of Sciences, 2002; CDS ID IV/27A.
  11. ^ "The Colour of Stars", Australia Telescope, Outreach and Education (Commonwealth Scientific and Industrial Research Organisation), December 21, 2004, retrieved 2012-01-16 

External links