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Studying small near-Earth asteroids is important to understand theirdynamical histories and origins as well as to mitigate the damage of theasteroid impact to the Earth. We report the results of multicolor photometry ofthe tiny near-Earth asteroid 2015 RN$_{35}$ using the 3.8 m Seimei telescope inJapan and the TRAPPIST-South telescope in Chile over 17 nights in 2022 Decemberand 2023 January. We observed 2015 RN$_{35}$ across a wide range of phaseangles from 2$^{\circ}$ to 30$^{\circ}$ in the $g$, $r$, $i$, and $z$ bands inthe Pan-STARRS system. These lightcurves show that 2015 RN$_{35}$ is in anon-principal axis spin state with two characteristic periods of $1149.7\pm0.3$s and $896.01\pm0.01$ s. We found that a slope of a visible spectrum of 2015RN$_{35}$ is as red as asteroid (269) Justitia, one of the very red objects inthe main belt, which indicates that 2015 RN$_{35}$ can be classified as an A-or Z-type asteroid. In conjunction with the shallow slope of the phase curve,we suppose that 2015 RN$_{35}$ is a high-albedo A-type asteroid. Wedemonstrated that surface properties of tiny asteroids could be wellconstrained by intensive observations across a wide range of phase angles. 2015RN$_{35}$ is a possible mission accessible A-type near-Earth asteroid with asmall $\Delta v$ of 11.801 km s$^{-1}$ in the launch window between 2030 and2035.

Multicolor Photometry of Tiny Near-Earth Asteroid 2015 RN$_{35}$ Across a Wide Range of Phase Angles: Possible Mission Accessible A-type Asteroid