TT Aquilae

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TT Aquilae
Observation data
Epoch J2000      Equinox J2000
Constellation Aquila
Right ascension 19h 08m 13.75s[1]
Declination +01° 17′ 55.15″[1]
Apparent magnitude (V) 6.46-7.7[2]
Spectral type F6-G5[2]
B−V color index 1.27 ± 0.02
Variable type Cepheid variable[1]
Radial velocity (Rv) 0 km/s
Proper motion (μ) RA: -0.35 mas/yr
Dec.: -4.47 mas/yr
Parallax (π) 0.41 ± 0.96 mas
Temperature 6,000–7,500 K
Other designations
HD 178359, BD+01° 3899, SAO 124305.
Database references
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)

TT Aquilae is a star in the constellation Aquila. A Cepheid variable, its apparent magnitude ranges from 6.46 to 7.7 over 13.7546 days.[2] It is a yellow-white supergiant that pulsates between spectral types F6 and G5.[2]


  1. ^ a b c "TT Aquilae - Classical Cepheid (delta Cep type)". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 29 June 2014. 
  2. ^ a b c d Watson, Christopher (4 January 2010). "TT Aquilae". AAVSO Website. American Association of Variable Star Observers. Retrieved 12 March 2014.