V604 Aquilae or Nova Aquilae 1905 is a nova which was first observed in the constellation Aquila in 1905 with a maximum brightness of

magnitude Magnitude may refer to: Mathematics *Euclidean vector, a quantity defined by both its magnitude and its direction *Magnitude (mathematics), the relative size of an object *Norm (mathematics), a term for the size or length of a vector *Order of ...

7.6. It was never bright enough to be seen with the naked eye. It was discovered by Williamina Fleming on a

Harvard College Observatory The Harvard College Observatory (HCO) is an institution managing a complex of buildings and multiple instruments used for astronomical research by the Harvard University Department of Astronomy. It is located in Cambridge, Massachusetts, United St ...

photographic plate taken on August 31, 1905. Examination of plates taken earlier indicates that peak brightness occurred in mid-August 1905. The star's quiescent visual band brightness is 19.6. V604 Aquilae faded by 3 magnitudes in just 25 days, making it a "fast nova". Detection of a faint nebula surrounding the star, with a radius of 0.4 arc minutes, was reported early in 1906. In 1994, a photometric study detected brightness variations of up to ~0.45 magnitudes on timescales of about one hour. An attempt to detect cool molecular gas surrounding the nova in 2015 was unsuccessful.

References

External links

http://www.tsm.toyama.toyama.jp/

Image V604 Aquilae

GCVS V0604 Aql
176779 Novae Aquila (constellation) 1905 in science Aquilae, V604 {{Var-star-stub