HD 208177

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HD 208177
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension  21h 54m 35.91630s[1]
Declination −03° 18′ 04.5532″[1]
Apparent magnitude (V) 6.20[2]
Spectral type F5IV[3]
U−B color index 0.07[2]
B−V color index 0.48[2]
Radial velocity (Rv)-20[4] km/s
Proper motion (μ) RA: +29.06[1] mas/yr
Dec.: −29.87[1] mas/yr
Parallax (π)16.89 ± 1.32[1] mas
Distance190 ± 20 ly
(59 ± 5 pc)
Mass1.63[5] M
Surface gravity (log g)3.94[6] cgs
Temperature6,577[6] K
Metallicity [Fe/H]0.30[6] dex
Age1.70[6] Gyr
Mass0.32[5] M
Other designations
BD-03° 5329, HD 208177, HIP 108144, HR 8363, SAO 145735.
Database references
Database references
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)

HD 208177 is a double star system in the equatorial constellation of Aquarius.[5] They are faintly visible to the naked eye with an apparent magnitude of 6.20.[2] The pair have an angular separation of 19.113.[7] The primary component is an evolved subgiant star with a stellar classification of F5IV,[3] it has an estimated 163%[5] of the Sun's mass and is about 1.7 billion years old[6]


  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 c d Nicolet, B. (1978), "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System", Astronomy and Astrophysics Supplement Series, 34: 1–49, Bibcode:1978A&AS...34....1N
  3. ^ a b Malaroda, S. (August 1975), "Study of the F-type stars. I. MK spectral types", Astronomical Journal, 80: 637–641, Bibcode:1975AJ.....80..637M, doi:10.1086/111786
  4. ^ Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
  5. ^ a b c d Tokovinin, Andrei (April 2014), "From Binaries to Multiples. II. Hierarchical Multiplicity of F and G Dwarfs", The Astronomical Journal, 147 (4): 14, arXiv:1401.6827, Bibcode:2014AJ....147...87T, doi:10.1088/0004-6256/147/4/87, 87
  6. ^ a b c d e Casagrande, L.; et al. (2011). "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey". Astronomy & Astrophysics. 530 (A138): 21. arXiv:1103.4651. Bibcode:2011A&A...530A.138C. doi:10.1051/0004-6361/201016276.
  7. ^ Kiyaeva, O. V.; et al. (June 2008), "Dynamical study of wide pairs of stars based on data from the WDS catalog", Astronomy Letters, 34 (6): 405–412, Bibcode:2008AstL...34..405K, doi:10.1134/S1063773708060054

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