Astronomy:HD 208177

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Short description: Double star system in the constellation Aquarius
HD 208177
Observation data
{{#ifeq:J2000|J2000.0 (ICRS)|Epoch J2000.0      Equinox J2000.0 (ICRS)| Epoch J2000      [[Astronomy:Equinox (celestial coordinates)|Equinox J2000}}
Constellation Aquarius[1]
HD 208177
Right ascension  21h 54m 35.915s[2]
Declination −03° 18′ 04.58″[2]
Apparent magnitude (V) 6.20[3]
companion
Right ascension  21h 54m 45.312s[4]
Declination −03° 18′ 34.35″[4]
Apparent magnitude (V) 15.16[5]
Characteristics
HD 208177
Evolutionary stage main sequence[2]
Spectral type F6/7V[6]
U−B color index 0.07[3]
B−V color index 0.48[3]
companion
Evolutionary stage main sequence[7]
Spectral type M3.5V[7]
Astrometry
HD 208177
Radial velocity (Rv)−20[8] km/s
Proper motion (μ) RA: +26.272[2] mas/yr
Dec.: −33.683[2] mas/yr
Parallax (π)13.7652 ± 0.0717[2] mas
Distance237 ± 1 ly
(72.6 ± 0.4 pc)
Absolute magnitude (MV)+2.05[1]
companion
Radial velocity (Rv)−14.33±2.85[4] km/s
Proper motion (μ) RA: +27.675[4] mas/yr
Dec.: −33.708[4] mas/yr
Parallax (π)13.7048 ± 0.0269[4] mas
Distance238.0 ± 0.5 ly
(73.0 ± 0.1 pc)
Details
HD 208177
Mass1.63[9] M☉
Radius2.87[10] R☉
Luminosity14[10] L☉
Surface gravity (log g)3.66[10] cgs
Temperature6,577[10] K
Metallicity [Fe/H]0.30[11] dex
Rotational velocity (v sin i)80[12] km/s
Age1.70[11] Gyr
companion
Mass0.32[9] M☉
Radius0.40[10] R☉
Luminosity0.018[10] L☉
Surface gravity (log g)4.83[10] cgs
Temperature3,341[10] K
Other designations
BD−03°5329, HD 208177, HIP 108144, HR 8363, SAO 145735
companion:
Database references
SIMBADdata
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)

HD 208177 is a binary star system in the equatorial constellation of Aquarius. They are faintly visible to the naked eye with an apparent magnitude of 6.20.[3] The pair have an angular separation of 144″ and the companion is of 15th magnitude.[9]

The primary component is a main-sequence star with a stellar classification of F6/7V.[6] It has an estimated 163%[9] of the Sun's mass and is about 1.7 billion years old[11] The companion is only 0.32 M☉.[9]

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  XHIP record for this object at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  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 4.2 4.3 4.4 4.5 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  5. ↑ Suissa, Gabrielle; Mandell, Avi M.; Wolf, Eric T.; Villanueva, Geronimo L.; Fauchez, Thomas; Kopparapu, Ravi Kumar (2020). "Dim Prospects for Transmission Spectra of Ocean Earths around M Stars". The Astrophysical Journal 891 (1): 58. doi:10.3847/1538-4357/ab72f9. Bibcode: 2020ApJ...891...58S. 
  6. ↑ 6.0 6.1 Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars, Vol. 5". Michigan Spectral Survey 5. Bibcode: 1999MSS...C05....0H. 
  7. ↑ 7.0 7.1 Montes, D.; González-Peinado, R.; Tabernero, H. M.; Caballero, J. A.; Marfil, E.; Alonso-Floriano, F. J.; Cortés-Contreras, M.; González Hernández, J. I. et al. (2018). "Calibrating the metallicity of M dwarfs in wide physical binaries with F-, G-, and K-primaries - I: High-resolution spectroscopy with HERMES: Stellar parameters, abundances, and kinematics". Monthly Notices of the Royal Astronomical Society 479 (1): 1332. doi:10.1093/mnras/sty1295. Bibcode: 2018MNRAS.479.1332M. 
  8. ↑ 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. 
  9. ↑ 9.0 9.1 9.2 9.3 9.4 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. 
  10. ↑ 10.0 10.1 10.2 10.3 10.4 10.5 10.6 10.7 Stassun, Keivan G. et al. (2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. Bibcode: 2019AJ....158..138S. 
  11. ↑ 11.0 11.1 11.2 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. 
  12. ↑ Głȩbocki, R.; Gnaciński, P. (2005). "Systematic errors in the determination of stellar rotational velocities". 13th Cambridge Workshop on Cool Stars 560: 571. Bibcode: 2005ESASP.560..571G. 



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