Astronomy:HD 208177

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Short description: Double star system in the constellation Aquarius
HD 208177
Observation data
Equinox J2000.0]] (ICRS)
Constellation Aquarius[1]
Right ascension  21h 54m 35.91630s[2]
Declination −03° 18′ 04.5532″[2]
Apparent magnitude (V) 6.20[3]
Characteristics
Spectral type F5IV[4]
U−B color index 0.07[3]
B−V color index 0.48[3]
Astrometry
Radial velocity (Rv)−20[5] km/s
Proper motion (μ) RA: +29.06[2] mas/yr
Dec.: −29.87[2] mas/yr
Parallax (π)16.89 ± 1.32[2] mas
Distance190 ± 20 ly
(59 ± 5 pc)
Absolute magnitude (MV)+2.05[1]
Details
Mass1.63[6] M☉
Surface gravity (log g)3.94[7] cgs
Temperature6,577[7] K
Metallicity [Fe/H]0.30[7] dex
Age1.70[7] Gyr
Mass0.32[6] M☉
Other designations
BD−03°5329, HD 208177, HIP 108144, HR 8363, SAO 145735
Database references
SIMBADdata
B
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.[6] They are faintly visible to the naked eye with an apparent magnitude of 6.20.[3] The pair have an angular separation of 19.113″.[8] The primary component is an evolved subgiant star with a stellar classification of F5IV.[4] It has an estimated 163%[6] of the Sun's mass and is about 1.7 billion years old[7]

References

  1. ↑ 1.0 1.1 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A. 
  2. ↑ 2.0 2.1 2.2 2.3 2.4 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V. 
  3. ↑ 3.0 3.1 3.2 3.3 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. 
  4. ↑ 4.0 4.1 Malaroda, S. (August 1975). "Study of the F-type stars. I. MK spectral types". Astronomical Journal 80: 637–641. doi:10.1086/111786. Bibcode: 1975AJ.....80..637M. 
  5. ↑ 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. doi:10.1134/S1063773706110065. Bibcode: 2006AstL...32..759G. 
  6. ↑ 6.0 6.1 6.2 6.3 Tokovinin, Andrei (April 2014). "From Binaries to Multiples. II. Hierarchical Multiplicity of F and G Dwarfs". The Astronomical Journal 147 (4): 14. doi:10.1088/0004-6256/147/4/87. 87. Bibcode: 2014AJ....147...87T. 
  7. ↑ 7.0 7.1 7.2 7.3 7.4 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. doi:10.1051/0004-6361/201016276. Bibcode: 2011A&A...530A.138C. 
  8. ↑ 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. doi:10.1134/S1063773708060054. Bibcode: 2008AstL...34..405K. 

External links



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