WD J1330+6435

Cool white dwarf in Draco about 280 light-years away. Strong sodium and calcium absorption make its light appear green, matching the simulated surface colour from its spectrum. It is the first star found with this hue.

Wikipedia

ID
1666074615061406336
Distance
86.35 pc · 281.6 ly
Parallax
11.58 mas
Magnitude (G)
20.64
Color (BP-RP)
-
Radius
0.01 R☉
RA · Dec
202.50° · 64.59°