9 Aquarii

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9 Aquarii
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension  21h 01m 08.33321s[1]
Declination −13° 31′ 47.9702″[1]
Apparent magnitude (V) 6.55[2]
Characteristics
Spectral type G6/8III[3]
Astrometry
Radial velocity (Rv)22.8 ± 2[4] km/s
Proper motion (μ) RA: -0.22[1] mas/yr
Dec.: 5.41[1] mas/yr
Parallax (π)4.69 ± 0.60[1] mas
Distanceapprox. 700 ly
(approx. 210 pc)
Other designations
BD−14° 5908, HD 200004, HIP 103728, SAO 164064[5]
Database references
SIMBADdata

9 Aquarii (abbreviated 9 Aqr) is a yellow giant with a spectral type of G8III[3] and an apparent magnitude of 6.55[2] in the constellation Aquarius. 9 Aquarii is the Flamsteed designation.

References[edit]

  1. ^ a b c d e van Leeuwen, F. (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. ^ a b Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H.
  3. ^ a b Houk, N.; Smith-Moore, M. (1988). "Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars. Volume 4, Declinations -26°.0 to -12°.0". Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars. 4. Bibcode:1988mcts.book.....H.
  4. ^ Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities". Bibcode:1953GCRV..C......0W.
  5. ^ "* 9 Aqr". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 28 January 2018.