The ZZ Ceti star GD 1212 was detected to have 19 independent modes from the two-wheel-controlled Kepler Spacecraft in 2014 .
By asymptotic analysis , we identify most of pulsation modes .
We find out two set of complete triplets , and four sets of doublet which are interpreted as rotation modes with l = 1 .
For the other five modes , the four modes f _ { 13 } , f _ { 15 } , f _ { 16 } and f _ { 4 } are identified as ones with l = 2 ; and the mode f _ { 7 } is identified to be the one with l = 1 .
Meanwhile we derive a mean rotation period of 6.65 \pm 0.21 h for GD 1212 according to the rotation splitting .
Using the method of matching the observed periods to theoretical ones , we obtain the best-fitting model with the four parameters as M _ { * } / M _ { \odot } = 0.775 , T _ { eff } = 11400 K , \log ( M _ { H } / M _ { * } ) = -5.0 , \log ( M _ { He } / M _ { * } ) = -2.5 for GD 1212 .
We find that due to the gradient of C/O abundance in the interior of white dwarf , some modes can not propagate to the stellar interior , which leads to the period spacing of the adjacent modes to become large .
This feature is just proven by the observational data from GD 1212 .
All of these imply that GD 1212 may be evolved from an intermediate mass star .