10 Aquilae

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10 Aquilae
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Aquila
Right ascension 18h 58m 46.92419s[1]
Declination +13° 54′ 23.9354″[1]
Apparent magnitude (V) 5.893[2]
Characteristics
Spectral type F0 p Sr Eu[3]
U−B color index +0.100[2]
B−V color index +0.257[2]
Variable type α2 CVn
Astrometry
Radial velocity (Rv) +14.5[4] km/s
Proper motion (μ) RA: +1.01[1] mas/yr
Dec.: -51.11[1] mas/yr
Parallax (π) 13.45 ± 0.67[1] mas
Distance 240 ± 10 ly
(74 ± 4 pc)
Absolute magnitude (MV) 5.9[5]
Details
Surface gravity (log g) 4.47 ± 0.33[6] cgs
Temperature 8,659 ± 308[6] K
Metallicity [Fe/H] +0.55 ± 0.17[6] dex
Rotational velocity (v sin i) +18[7] km/s
Other designations
BD+13 3838, HD 176232, HIP 93179, HR 7167, SAO 104303.[8]

10 Aquilae is the Bayer designation for star in the equatorial constellation of Aquila. It has an apparent visual magnitude of 5.9[2] and thus is a faint star that is just visible to the naked eye in dark skies. The brightness of this star is diminished by 0.17 in visual magnitude from extinction caused by interstellar gas and dust.[6] Based on an annual parallax shift of 13.45 mas, the distance to this star is around 240 light-years (74 parsecs).

The outer envelope of this star has an effective temperature of 8,659 K,[6] giving it the yellow-white hued glow of an F-type star.[9] It is a type of chemically peculiar star known as an Ap star, as indicated by the 'p' in the stellar classification. Because it is a pulsating variable star, it belongs to a sub-group known as rapidly oscillating Ap stars.[5]

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 c d Stepien, K. (December 1968), "Photometric behavior of magnetic stars", Astrophysical Journal 154: 945, Bibcode:1968ApJ...154..945S, doi:10.1086/149815. 
  3. ^ Cowley, A. et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819. 
  4. ^ Wilson, Ralph Elmer (1953), General catalogue of stellar radial velocities, Carnegie Institution of Washington, Bibcode:1953QB901.W495...... 
  5. ^ a b Weiss, W. W.; Kochukhov, O. (April 2008), "Element stratification in roAp stars. 10 Aquilae (HD176232)", Contributions of the Astronomical Observatory Skalnaté Pleso 38 (2): 329–334, Bibcode:2008CoSka..38..329N. 
  6. ^ a b c d e Koleva, M.; Vazdekis, A. (February 2012), "Stellar population models in the UV. I. Characterisation of the New Generation Stellar Library", Astronomy & Astrophysics 538: A143, arXiv:1111.5449, Bibcode:2012A&A...538A.143K, doi:10.1051/0004-6361/201118065. 
  7. ^ Royer, F. et al. (October 2002), "Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i", Astronomy and Astrophysics 393: 897–911, arXiv:astro-ph/0205255, Bibcode:2002A&A...393..897R, doi:10.1051/0004-6361:20020943. 
  8. ^ "V1286 Aql -- Variable Star of alpha2 CVn type", SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), retrieved 2012-07-25. 
  9. ^ "The Colour of Stars", Australia Telescope, Outreach and Education (Commonwealth Scientific and Industrial Research Organisation), December 21, 2004, retrieved 2012-01-16. 

External links[edit]