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.