We have computed a grid of theoretical models to fit the twelve oscillation modes of HIP 80088 observed by K2 .
HIP 80088 is determined to be a pre-main sequence star , in which CN cycle has not arrived at the equilibrium state .
Mass fractions of C12 and N14 in metal composition are 0.1277 ^ { +0.0064 } _ { -0.0049 } and 0.1092 ^ { +0.0057 } _ { -0.0074 } respectively , indicating that twenty-eight percent of C12 have turned into N14 .
Meanwhile , our fitting results show that physical parameters of HIP 80088 converge to a small range : M = 1.68 - 1.78 M _ { \odot } , Z = 0.015 - 0.018 , \upsilon _ { e } = 120 - 136 km s ^ { -1 } , \log g = 4.114 - 4.125 , R = 1.882 - 1.914 R _ { \odot } , \tau _ { 0 } = 7636 - 7723 s , and age = 9.03 - 10.21 Myr .
Based on our model fittings , f _ { 3 } is suggested to be one radial mode , f _ { 2 } , f _ { 4 } , f _ { 8 } , and f _ { 11 } to be four \ell = 1 modes , and f _ { 1 } , f _ { 5 } , f _ { 6 } , f _ { 7 } , f _ { 9 } , f _ { 10 } , and f _ { 12 } to be seven \ell = 2 modes .
In particularly , we find that ( f _ { 2 } , f _ { 4 } , f _ { 8 } ) form one complete triplet with the averaged frequency spacing of 16.045 \mu Hz , and ( f _ { 5 } , f _ { 7 } , f _ { 9 } , f _ { 10 } ) form four components of one quintuplet with the averaged frequency spacing of 13.388 \mu Hz .
The two averaged frequency spacings are not equal .
Based on the best-fitting model , those \ell = 2 modes of HIP 80088 are found to be mixed modes , which are p-dominated modes with pronounced g-mode features , while oscillation modes with \ell = 1 are p modes .