7 Aquilae

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7 Aquilae
Observation data
Epoch J2000      Equinox J2000
Constellation Aquila
Right ascension 18h 51m 05.41169s[1]
Declination –03° 15′ 40.01079″[1]
Apparent magnitude (V) 6.894[2]
Spectral type F0V[2]
B−V color index +0.285[3]
Variable type δ Sct[3]
Radial velocity (Rv) –29[4] km/s
Proper motion (μ) RA: –47.13[1] mas/yr
Dec.: –59.85[1] mas/yr
Parallax (π) 8.87 ± 0.45[1] mas
Distance 136[2] pc
Absolute magnitude (MV) 1.22[2]
Mass 2.05[2][3] M
Luminosity 24[3] L
Surface gravity (log g) 3.62[2] cgs
Temperature 7,257[2] K
Metallicity [Fe/H] 0.01[2] dex
Rotational velocity (v sin i) 32[3] km/s
Other designations
BD–03°4390, HD 174532, HIP 92501, SAO 142696
Database references

7 Aquilae (abbreviated 7 Aql) is a star in the equatorial constellation of Aquila. 7 Aquilae is the Flamsteed designation. Its apparent magnitude is 6.9 and it is at a distance of about 136 parsecs (440 light-years) from Earth. This is a pulsating variable star of the Delta Scuti type.


  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:0708.1752free to read, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357. 
  2. ^ a b c d e f g h Fox Machado, L.; Alvarez, M.; Michel, R.; Moya, A.; Peña, J. H.; Parrao, L.; Castro, A. (2010). "Strömgren photometry and spectroscopy of the δ Scuti stars 7 Aql and 8 Aql". New Astronomy. 15 (5): 397. arXiv:0912.2808free to read. Bibcode:2010NewA...15..397F. doi:10.1016/j.newast.2009.11.006. 
  3. ^ a b c d e Fox Machado, L.; et al. (August 2007), "Multisite Observations of δ Scuti Stars 7 Aql and 8 Aql (a New δ Scuti Variable): The Twelfth STEPHI Campaign in 2003", The Astronomical Journal, 134 (2): 860–866, arXiv:0706.0576free to read, Bibcode:2007AJ....134..860F, doi:10.1086/520062. 
  4. ^ Wilson, Ralph Elmer (1953), "General Catalogue of Stellar Radial Velocities", Washington, Washington: Carnegie Institution of Washington, Bibcode:1953GCRV..C......0W.