title: 45 Aquilae
text: # 45 Aquilae
  
  45 Aquilae, abbreviated 45 Aql, is a triple star system in the equatorial constellation of Aquila. 45 Aquilae is its Flamsteed designation. It is located 350 light-years (110 parsecs) away from Earth, give or take a 6 light-year margin of error, and has a combined apparent visual magnitude of 5.7. The system is moving closer to the Earth with a heliocentric radial velocity of -46 km/s.
  
  Based upon a stellar classification of A3 IV, the primary component of this system is a subgiant star that is in the process of evolving away from the main sequence. The star has 2.6 times the mass of the Sun and is spinning with a projected rotational velocity of 75 km/s. It has an orbiting companion with a period of 20.31 years and an eccentricity of 0.054. At an angular separation of 42.2 arcseconds from this pair is a 12.7 magnitude tertiary companion.
  
  