Spectrum of TCP J17242302+3258109 We reported optical spectrum of TCP J17242302+3258109 to ATel: https://www.astronomerstelegram.org/?read=15035 Our spectrum confirms that this object is a dwarf nova, as expected. -- ________________________________________________________________  田口 健太　(TAGUCHI, Kenta)  京都大学大学院理学研究科宇宙物理学教室  (Department of Astronomy, Graduate School of Science, Kyoto University) kentagch@kusastro.kyoto-u.ac.jp  09090536980