7 Aquilae

From Wikipedia, the free encyclopedia
Jump to: navigation, search
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) 6.88[2]
Characteristics
Spectral type A2[2]
Variable type δ Sct[3]
Astrometry
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 370 ± 20 ly
(113 ± 6 pc)
Details
Mass 2[3] M
Luminosity 24[3] L
Temperature 7,400[3] K
Other designations
BD–03 4390, HD 174532, HIP 92501, SAO 142696.[2]

7 Aquilae (7 Aql) is the Flamsteed designation for a star in the equatorial constellation of Aquila. Its apparent magnitude is 6.8[2] and it is at a distance of about 370 light-years (110 parsecs) from Earth.[1] This is a pulsating variable star of the Delta Scuti type.[3]

References[edit]

  1. ^ a b c d e f 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 "7 Aql -- Variable Star of delta Sct type", SIMBAD (Centre de Données astronomiques de Strasbourg), retrieved 2012-07-25. 
  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:0706.0576, Bibcode:2007AJ....134..860F, doi:10.1086/520062. 
  4. ^ Wilson, Ralph Elmer (1953), General Catalogue of Stellar Radial Velocities, Washington: Carnegie Institution of Washington, Bibcode:1953QB901.W495......