HD 208177
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| 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 mas[2] |
| Distance | 190 ± 20 ly (59 ± 5 pc) |
| Absolute magnitude (MV) | +2.05[1] |
| Details | |
| Mass | 1.63[6] M☉ |
| Surface gravity (log g) | 3.94[7] cgs |
| Temperature | 6,577[7] K |
| Metallicity [Fe/H] | 0.30[7] dex |
| Age | 1.70[7] Gyr |
| Mass | 0.32[6] M☉ |
| Other designations | |
| BD−03°5329, HD 208177, HIP 108144, HR 8363, SAO 145735 | |
| Database references | |
| SIMBAD | data |
| 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
[edit]- ^ a b 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.
- ^ 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. S2CID 18759600.
- ^ 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.
- ^ 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.
- ^ 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. S2CID 119231169.
- ^ 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. S2CID 56066740. 87.
- ^ 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. S2CID 56118016.
- ^ 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. S2CID 120588520.
External links
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