No aberration correction is applied in Starry Night.

At one point, the atmospheric refraction correction was applied to the Ra/Dec but we realized that didn't make sense. So, now, it's only applied to the Alt/Az; meaning that the RA/Dec that you see in the Info Pane (for something like 6.2.3 and later) is the exact value that we've gotten from whatever Database that object is taken from, and hence the error bars in Ra/Dec are whatever those Databases have. But, we DO correct the Alt/Az for atmospheric refraction because those measurements are relative to the earth, where the atmosphere has an effect.