Omega1 Aquarii

For other star systems with this Bayer designation, see Omega Aquarii.
Omega1 Aquarii
Diagram showing star positions and boundaries of the Aquarius constellation and its surroundings


Location of ω1 Aquarii (circled)

Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 23h 39m 47.06778s[1]
Declination –14° 13′ 19.8376″[1]
Apparent magnitude (V) 4.96[2]
Characteristics
Spectral type A7 IV[3]
B−V color index +0.25[2]
Astrometry
Radial velocity (Rv)–2[4] km/s
Proper motion (μ) RA: +51.25[1] mas/yr
Dec.: –55.35[1] mas/yr
Parallax (π)22.94 ± 1.05[1] mas
Distance142 ± 7 ly
(44 ± 2 pc)
Details
Rotational velocity (v sin i)105[5] km/s
Age0.6[6] Gyr
Other designations
102 Aquarii, BD–15 6471, HD 222345, HIP 116758, HR 8968, SAO 165818.[7]
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)

Omega1 Aquarii (ω1 Aqr, ω1 Aquarii) is the Bayer designation for a star in the equatorial constellation of Aquarius. With an apparent visual magnitude of 4.96,[2] this star is visible to the naked eye from the suburbs. The distance to this star can be estimated from the parallax as roughly 142 light-years (44 parsecs), with a 5% margin of error.[1]

This is a subgiant star, having a stellar classification of A7 IV.[3] It is spinning rapidly with a projected rotational velocity of 105 km/s.[5]

References

  1. 1 2 3 4 5 6 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752Freely accessible, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
  2. 1 2 3 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.
  3. 1 2 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. ↑ Wilson, Ralph Elmer (1953), General Catalogue of Stellar Radial Velocities, Washington: Carnegie Institution of Washington, Bibcode:1953GCRV..C......0W.
  5. 1 2 Royer, F.; Zorec, J.; Gómez, A. E. (February 2007), "Rotational velocities of A-type stars. III. Velocity distributions", Astronomy and Astrophysics, 463 (2): 671–682, arXiv:astro-ph/0610785Freely accessible, Bibcode:2007A&A...463..671R, doi:10.1051/0004-6361:20065224.
  6. ↑ Vican, Laura (June 2012), "Age Determination for 346 Nearby Stars in the Herschel DEBRIS Survey", The Astronomical Journal, 143 (6): 135, arXiv:1203.1966Freely accessible, Bibcode:2012AJ....143..135V, doi:10.1088/0004-6256/143/6/135.
  7. ↑ "102 Aqr -- Star", SIMBAD Astronomical Object Database, Centre de Données astronomiques de Strasbourg, retrieved 2012-06-24.
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