14 Aquarii

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HD 202466
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 21h 16m 17.77598s[1]
Declination −09° 12′ 52.7669″[1]
Apparent magnitude (V) 6.46[2]
Characteristics
Spectral type M4III:[3]
B−V color index 1.57[2]
Variable type Semiregular[3]
Astrometry
Radial velocity (Rv) 8.00[4] km/s
Proper motion (μ) RA: -6.56[1] mas/yr
Dec.: +2.87[1] mas/yr
Parallax (π) 1.97 ± 0.42[1] mas
Distance approx. 1,700 ly
(approx. 500 pc)
Absolute magnitude (MV) -2.3[3]
Details
Mass 2.9[3] M
Radius 179[3] R
Temperature 3,700[3] K
Other designations
IW Aquarii, 14 Aquarii, BD-09 5700, HD 202466, HIP 105019,SAO 145251.
Database references
SIMBAD data

14 Aquarii (IW Aquarii or HD 202466) is red giant star. It is a semiregular variable with an amplitude of less than a tenth of a magnitude, and shows variations on a timescale of just one day.[3]

References[edit]

  1. ^ a b c d e 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. ^ a b Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27. Bibcode:2000A&A...355L..27H. 
  3. ^ a b c d e f g Koen, Chris; Laney, Dave (2000). "Rapidly oscillating M giant stars?". Monthly Notices of the Royal Astronomical Society 311 (3): 636. Bibcode:2000MNRAS.311..636K. doi:10.1046/j.1365-8711.2000.03127.x. 
  4. ^ Kharchenko, N. V.; Scholz, R.-D.; Piskunov, A. E.; Röser, S.; Schilbach, E. (2007). "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ˜55000 stars and mean radial velocities of 516 Galactic open clusters and associations". Astronomische Nachrichten 328 (9): 889. Bibcode:2007AN....328..889K. doi:10.1002/asna.200710776. 

External links[edit]