There's the coma, and then there is the nucleus, which here is too small to see, and you have to remember that in the case of Rosetta, the spacecraft is in that center pixel.
Tu je koma, zatim jezgra, koja se ovdje ne vidi jer je premalena. Imajte na umu da se, kad je u pitanju Rosetta, ta svemirska letjelica nalazi u tom središnjem pikselu.