V1315 Aquilae

V1315 Aquilae is a cataclysmic variable star located in the constellation of Aquila.  It is a type of cataclysmic variable known as a nova-like variable (NL), specifically a SW Sextantis star.  Nova-like variables such as these SW Sextantis stars are characterized as having non-magnetic white dwarfs and do not undergo dwarf-nova eruptions.  There is some evidence that SW Sextantis stars may contain a magnetic white dwarf.  Being a SW Sextantis star, V1315 Aquilae has a high rate of mass transfer, so it is in steady-state accretion and in a constant state of outburst.  It emits the majority of its light in the visible range, which is emitted from the accretion disk.  The eclipse depth is 1.8 mag.  No description of the donating star has been mentioned. 

Nova shell 
V1315 Aquilae has a roughly spherical shell of material around it with a maximum mass of  solar masses, which is too small to be related to a planetary nebula or supernova remnant.  It is predicted that this shell is the remnant of a nova eruption.  This nova eruption is estimated to be roughly 500 to 1200 years old.  V1315 Aquilae is the first nova-like star to have been discovered with a nova shell. 

References 

Category:White dwarfs
Category:Aquila (constellation)
Category:Cataclysmic variable stars
Category:Eclipsing binaries
Aquilae, V1215