Low- and medium resolution spectra of the fast nova , Nova ( V1494 ) Aql 1999 No.2 obtained approximately 6 , 7 , 19 and 28 days after the maximum brightness are presented and discussed .
The spectrum covering the whole optical range at day 6 shows the principal plus diffuse-enhanced spectrum .
The presence of strong Fe II multiplets with P-Cyg profiles suggest that V1494 Aql belongs to the “ Fe II ” class defined by Williams ( 1992 ) .
The medium-resolution profiles ( \lambda / \Delta \lambda \approx 7000 ) of the H \gamma and H \delta lines shows well-defined sharp absorption features with the same radial velocities , while the H \alpha split into two distinct emission peaks in the last two spectra ( \Delta t =19 and 28 days ) .
The observed behaviour suggests an expanding equatorial ring with possible small-scale clumpiness in the nova shell .
The visual lightcurve is used to deduce M _ { V } by the maximum magnitude versus rate of decline relationship .
The resulting parameters are : t _ { 2 } = 6.6 \pm 0.5 days , t _ { 3 } =16 \pm 0.5 days , M _ { V } = -8.8 \pm 0.2 mag .
Adopting this value , a distance d=3.6 \pm 0.3 kpc is determined .