KIC 8263801: A clump star in the Kepler open cluster NGC 6866 field?

• We study solar-like oscillations in red giant stars in the field of open cluster NGC 6866 using data from Kepler space mission.
• Search for red clump stars amongst red giants stars are made.
• Convincing echelle diagram constructed for KIC 8263801.
• Gravity-mode period spacings calculated for KIC 8263801.
• KIC 8263801 is a secondary red clump burning helium in a non degenerate core.

In this paper we study the field of Kepler open cluster NGC 6866 using the data obtained from Kepler mission collected for a period of 4 years. We search for the red clump (RC) stars amongst the red giant (RG) stars showing solar-like oscillations using median gravity-mode period spacings (ΔP). We find a RG star KIC 8263801 having median gravity-mode period spacing 173.7 ± 6.4 s. We claim based on the median gravity-mode period spacing that KIC 8263801 is a secondary red clump (SRC) star which is massive enough to have ignited Helium burning in a non degenerate core. In the literature, no classification for KIC 8263801 has been provided. This is the first time that a star located in the field of NGC 6866 is classified in this manner.