V604 Aquilae or Nova Aquilae 1905 is a nova which was first observed in the constellationAquila in 1905 with a maximum brightness of magnitude 7.6.[3] It was never bright enough to be seen with the naked eye. It was discovered by Williamina Fleming on a Harvard College Observatoryphotographic plate taken on August 31, 1905.[6] Examination of plates taken earlier indicates that peak brightness occurred in mid-August 1905.[7] The star's quiescent visual band brightness is 19.6.[5]
V604 Aquilae faded by 3 magnitudes in just 25 days, making it a "fast nova".[6] Detection of a faint nebula surrounding the star, with a radius of 0.4 arc minutes, was reported early in 1906.[8] In 1994, a photometric study detected brightness variations of up to ~0.45 magnitudes on timescales of about one hour.[9] An attempt to detect cool molecular gas surrounding the nova in 2015 was unsuccessful.[10]
12Downes, Ronald A.; Webbink, Ronald F.; Shara, Michael M.; Ritter, Hans; Kolb, Ulrich; Duerbeck, Hilmar W. (June 2001). "A Catalog and Atlas of Cataclysmic Variables: The Living Edition". The Publications of the Astronomical Society of the Pacific. 113 (784): 764–768. arXiv:astro-ph/0102302. Bibcode:2001PASP..113..764D. doi:10.1086/320802. S2CID16285959.
1234"V0604 Aql". The International Variable Star Index. AAVSO. Retrieved 27 October 2022.
↑Harrison, T. E. (February 1991). "IRAS Observations of Classical Novae. II. Modeling the Detections". Astronomical Journal. 101: 587. Bibcode:1991AJ....101..587H. doi:10.1086/115708.
↑Haefner, R. (August 2004). "CCD Photometry of Five Faint Cataclysmic Variables". Information Bulletin on Variable Stars. 5550: 1. Bibcode:2004IBVS.5550....1H.
