[3] The luminosity class of UGC 9684 is I-II[4][3] and it is classified as an active star-forming galaxy according to a study published in 2022,[5] in which produces one solar mass of stars every few years, with levels of stellar formation.

[5] As for the star formation, they employed a decreasing function of (SFR ∝ e−t ) and also a delayed function (SFR ∝ t × e−t ) as well as the stellar population libraries written from Bruzual & Charlot[10] and Convoy et al.[11] Several metallicity estimates, published by Prieto et al. 2008,[12] Kelly & Kirshner from 2012,[13] whom the majority agreed, it is slightly above solar oxygen abundance 12+ log(O/H) ≈ 9.0 which corresponds to ~2 Z⊙.

[25] The supernova was Type II[26] in which its progenitor, a massive star,[27] was enriched in helium and nitrogen in relative abundances in mass fractions of 0.30–0.40 and 8.2 × 10−3, respectively.

[5] A first study shows 1 day after the discovery, there is a significant He II emission which has strong flash features.

[28] Another study shows during the 4 days after, there was an increase in velocity of hydrogen lines (from ~250 to ~1000 km/s) suggesting complex circumstellar medium (CSM).

[5] A presence of dense and confined CSM as well as its inhomogeneous structure, indicates a phrase of enhanced mass loss of the SN 2020pni progenitor a year before the explosion.