Find the Moonlight artifact

 is an optional side-mission featured in S.T.A.L.K.E.R.: Lost Alpha. "Quite an expensive artefact and almost perfectly round, I must have one. You will be well rewarded."

- Sakharov

Overview

 * The side missions in Lost Alpha are largely symbolic, reward the player far more frugally than in the base game, and detract from the game generally. Why would a player hunt down and recover a prime artifact and off load it for a pittance?
 * This is the fourth such mission, and the third of this type given by Sakharov and completion is required for progression to the other (poorly rewarding) missions.

Trivia

 * The actual artefact could be lying around near the various anomaly clusters on the Yantar level (depending upon the time of day), but these spawns are fixed at the beginning of the game and may not be reliable. They may also be confused with Green Parasite and Blue Parasite artifacts under poor lighting conditions.
 * The best easy location for finding this artifact with a reasonable probability is around the Electro Oasis at the proper time. These spawns are also fixed at game initiation, and do not respawn.
 * Another source might be the garbage heap on the Outskirts level, however this may be problematic to access early in the game.