Omega1 Aquarii

Omega1 Aquarii, Latinized from 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]

For other star systems with this Bayer designation, see Omega Aquarii.
Omega1 Aquarii
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)
Absolute magnitude (MV)+1.78[5]
Details
Luminosity16[5] L☉
Rotational velocity (v sin i)105[6] km/s
Age0.6[7] Gyr
Other designations
ω1 Aqr, 102 Aquarii, BD–15 6471, HD 222345, HIP 116758, HR 8968, SAO 165818.[8]
Database references
SIMBADdata

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.[6] The star is about 600[7] million years old and is radiating 16[5] times the Sun's luminosity.

References
  1. van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
  2. 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. 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. Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015.
  6. 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/0610785, Bibcode:2007A&A...463..671R, doi:10.1051/0004-6361:20065224.
  7. Vican, Laura (June 2012), "Age Determination for 346 Nearby Stars in the Herschel DEBRIS Survey", The Astronomical Journal, 143 (6): 135, arXiv:1203.1966, Bibcode:2012AJ....143..135V, doi:10.1088/0004-6256/143/6/135.
  8. "* ome01 Aqr". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2012-06-24.
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