Researchers suggest that the presence of alkali metals indicates the accretion of crust material.

WD 2317+1830 likely was a star with sub-solar metallicity, which is evident from its old age, as well as from its thick disk or halo kinematics.

This low metallicity means that the planetesimals that formed around this old white dwarf had a composition more similar to BBN abundances.

[3] A more recent work found a higher temperature and younger cooling age of about 6.4 Gyrs.

The researchers also detected infrared excess, indicative of a debris disk, around this white dwarf.