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Open Access Articles- Top Results for Iota Aquarii

Iota 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>–10.0[4] km/s</td></tr><tr style="vertical-align:top;"><td>Proper motion (μ)</td><td> RA: +36.89[1] mas/yr
Dec.: –58.99[1] mas/yr </td></tr><tr style="vertical-align:top;"><td>Parallax (π)</td><td>18.62 ± 0.22[1]mas</td></tr><tr style="vertical-align:top;"><td>Distance</td><td>175 ± 2 ly
(Lua error in Module:Math at line 495: attempt to index field 'ParserFunctions' (a nil value). ± Lua error in Module:Math at line 495: attempt to index field 'ParserFunctions' (a nil value).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>2.7[5] R</td></tr><tr style="vertical-align:baseline;"><td>Surface gravity (log g)</td><td>4.09 ± 0.08[6] cgs</td></tr><tr style="vertical-align:baseline;"><td>Temperature</td><td>11,284 ± 284[5] K</td></tr><tr style="vertical-align:baseline;"><td>Metallicity [Fe/H]</td><td>–0.08 ± 0.12[6] dex</td></tr><tr style="vertical-align:baseline;"><td>Rotational velocity (v sin i)</td><td>135[7] km/s</td></tr><tr style="vertical-align:baseline;"><td>Age</td><td>30–60[8] Myr</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">
33 Aquarii, BD–14 6209, FK5 828, HD 209819, HIP 109139, HR 8418, SAO 164861.[9]
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Iota Aquarii <tr><td colspan="2" style="text-align:center;">

Location of ι Aquarii (circled)
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Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 22h 06m 26.22742s[1]
Declination –13° 52′ 10.8615″[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. B8 V[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. –0.288[2]

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Iota Aquarii (ι Aqr, ι Aquarii) is the Bayer designation for a star in the equatorial constellation of Aquarius. It is visible to the naked eye with an apparent magnitude of +4.279.[2] based upon parallax measurements made during the Hipparcos mission, the distance to this star is around Script error: No such module "convert"..[2]

The spectrum of this star fits a stellar classification of B8 V,[3] showing that this is a B-type main sequence star. It has 2.7[5] times the radius of the Sun and is spinning rapidly with a projected rotational velocity of 135 km/s.[7] A 2010 infrared search for companions around this star was unsuccessful.[8]

References

  1. 1.0 1.1 1.2 1.3 1.4 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 2.4 Kozok, J. R. (September 1985), "Photometric observations of emission B-stars in the southern Milky Way", Astronomy and Astrophysics Supplement Series 61: 387–405, Bibcode:1985A&AS...61..387K. 
  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 5.2 Underhill, A. B. et al. (November 1979), "Effective temperatures, angular diameters, distances and linear radii for 160 O and B stars", Monthly Notices of the Royal Astronomical Society 189: 601–605, Bibcode:1979MNRAS.189..601U, doi:10.1093/mnras/189.3.601. 
  6. 6.0 6.1 Wu, Yue et al. (January 2011), "Coudé-feed stellar spectral library - atmospheric parameters", Astronomy and Astrophysics 525: A71, Bibcode:2011A&A...525A..71W, arXiv:1009.1491, doi:10.1051/0004-6361/201015014. 
  7. 7.0 7.1 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. 
  8. 8.0 8.1 Ehrenreich, D. et al. (November 2010), "Deep infrared imaging of close companions to austral A- and F-type stars", Astronomy and Astrophysics 523: A73, Bibcode:2010A&A...523A..73E, arXiv:1007.0002, doi:10.1051/0004-6361/201014763. 
  9. "iot Aqr -- Star", SIMBAD Astronomical Object Database (Centre de Données astronomiques de Strasbourg), retrieved 2012-06-30. 

External links