Abundance ratios of different elements. Black points represent two APOGEE measurements without flags and our optical spectra measurement of HD 69962 (with 1σ uncertainties as errorbars), contrasted against other stars in APOGEE (light blue). Most of our measurements are consistent with the bulk of the Galaxy. The white dwarf WD J0820 abundances are depicted, considering potential phases of build-up (BU), steady state (SS) or declining phase after two sinking timescales of Mg (DP2τ). A red arrow illustrates the potential effect of incomplete condensation and how it modifies the abundance ratios of the primordial stellar nebula, although heating in the post-nebular phase would produce a similar effect to these elements. The size of the red arrows reflects the predicted effect on elemental abundances when the material is heated to 1340 K. Considering fractionation, the abundances of star and accreted planetary material are consistent within uncertainties.