Alpha Aquilae (AFI: /al-tair/ α Aql, α Aquilae) is a white main sequence star with magnitude +0.77, located about 17 light-years from Earth, in the constellation Aquila. It is the brightest star in the constellation and the twelfth brightest star in the night sky. it is also one of the closest to Earth. It is also one of the vertices of the Summer Triangle, being the other two Vega and Deneb. Its proximity to the celestial equator makes it observable from all populated regions of the Earth.
Altair is notable for its very rapid rotation on itself: by measuring the width of its spectral lines, it has been found that it performs a complete rotation on itself in just 8 and a half hours. By comparison, the Sun takes about 25 days to rotate on itself. This speed of rotation crushes the star to the poles, making it an oblate spheroid. Altair is also a Delta Scuti variable.
Shooting data:Camera canon eos 1100d fullspectrum,yashika lens 50mm f 1/4 - iso 1600 - 31x60s - optolong l-pro eos clip filter - use of lx2 minitrack astroinseguitor - apt capture - sum with sequator and photoshop processing