<page_title> Rapidly oscillating Ap star </page_title> <section_title> List of identified roAp stars </section_title> <table> <cell> HD 177765 <col_header> Star name </col_header> </cell> <cell> 23.6 <col_header> Period (minutes) </col_header> </cell> </table>
The roAp star, HD 177765 has the longest period at 23.6 minutes.