We present optical and infrared photometry of the classical nova V906 Car , also known as Nova Car 2018 and ASASSN-18fv , discovered by ASASS-SN survey on 16.32 March 2018 UT ( MJD 58193.0 ) .
The nova reached its maximum on MJD 58222.56 at V _ { max } = 5.84 \pm 0.09 mag and had decline times of t _ { 2 ,V } = 26.2 d and t _ { 3 ,V } = 33.0 d. The data from Evryscope shows that the nova had already brightened to g ^ { \prime } \simeq 13 mag five days before discovery , as compared to its quiescent magnitude of g = 20.13 \pm 0.03 .
The extinction towards the nova , as derived from high resolution spectroscopy , shows an estimate consistent with foreground extinction to the Carina Nebula of A _ { V } = 1.11 _ { -0.39 } ^ { +0.54 } .
The light curve resembles a rare C ( cusp ) class nova with a steep decline slope of \alpha = -3.94 post cusp flare .
From the lightcurve decline rate , we estimate the mass of white dwarf to be M _ { WD } = < 0.8 M \textsubscript \odot , consistent with M _ { WD } = 0.71 ^ { +0.23 } _ { -0.19 } derived from modelling the accretion disk of the system in quiescence .
The donor star is likely a K-M dwarf of 0.23-0.43 M _ { \odot } , which is being heated by its companion .