Investigating the Observational Properties of Type Ib Supernova SN 2017iro

We report results of optical imaging and low-resolution spectroscopic monitoring of supernova (SN) 2017iro that occurred in the nearby (similar to 31 Mpc) galaxy NGC 5480. The He i lambda 5876 feature present in the earliest spectrum (-7 days) classified it as a Type Ib SN. The follow-up observations span from -7 to +266 days with respect to the B-band maximum. With a peak absolute magnitude in V band M ( V ) = -17.76 +/- 0.15 mag and bolometric luminosity log(10) L = 42.39 +/- 0.09 erg s(-1), SN 2017iro is a moderately luminous Type Ib SN. The overall light-curve evolution of SN 2017iro is similar to that of SN 2012au and SN 2009jf during the early (up to similar to 100 days) and late phases (>150 days), respectively. The line velocities of both Fe ii lambda 5169 and He i lambda 5876 are similar to 9000 km s(-1) near the peak. The analysis of the nebular phase spectrum (similar to+209 days) indicates an oxygen mass of similar to 0.35 M (circle dot). The smaller [O i]/[Ca ii] flux ratio of similar to 1 favors a progenitor with a zero-age main-sequence mass in the range similar to 13-15 M (circle dot), most likely in a binary system, similar to the case of iPTF13bvn. The explosion parameters are estimated by applying different analytical models to the quasi-bolometric light curve of SN 2017iro. Ni-56 mass synthesized in the explosion has a range of similar to 0.05-0.10 M (circle dot), ejecta mass similar to 1.4-4.3 M (circle dot), and kinetic energy similar to(0.8-1.9) x 10(51) erg.