Golden Eggsteroid #16 (Dawn Spacecraft) is located on level 8-11 of Angry Birds Space Beak Impact. The Dawn is hiding in plain sight right above the slingshot. Once you hit the egg you’ll immediately be transported via a wormhole to the Eggsteroid level (E-16).
If you need help, the video below shows the location of the Golden Eggsteroid a strategy for passing the level with 3 stars.