You can find standalone Russian subtitle files created by independent translators on dedicated platforms:
Russian subtitles ( русские субтитры ) for the movie (1999) are available through specialized subtitle databases and social media video platforms. Subtitle Files (.srt) You can find standalone Russian subtitle files created
October Sky (1999) - Октябрьское небо - Русские субтитры You can find standalone Russian subtitle files created
Several Russian social media and video hosting sites host the movie with embedded or selectable Russian subtitles: You can find standalone Russian subtitle files created