The star, as seen from Earth, has an apparent magnitude of 13.8.
The light from the four stars in the system give a combined apparent magnitude of +3.80.
Being so far from the Sun, it only has an apparent magnitude of 23.
It also has an apparent magnitude of 5.66 and is about 3,600 light years away.
The star system has a combined apparent magnitude of 2.9.
It comes to opposition in late May at an apparent magnitude of 20.4.
Because of its low apparent magnitude, Kepler-40 cannot be seen with the naked eye.
It had an apparent magnitude of 13.5 from its center.
Its apparent magnitude is 4.98, and approximately 839 light years away from Earth.
Kepler-11 has an apparent magnitude of 14.2, and thus cannot be seen with the naked eye.