File:S-2002 N 5 VLT-FORS1 2002-09-03 annotated.gif

English: Animation of Neptune's irregular moon S/2002 N 5 (formerly c02N4), imaged as a slow-moving 25th magnitude object by Brett J. Gladman et al. with the ESO's VLT-FORS1 imager on 3 September 2002. Each frame is a median stack of four 420-second exposures taken in the R-band filter; the individual exposures are shifted slightly to follow the moon's movement so that it appears as a point source in the median stack. The dates indicated at the bottom left corner indicate the midpoint time (from 1st exposure start to 4th exposure end time) of each stack. The moving dark spots and curves are image artifacts due to dust on the camera. These images were taken as part of follow-up observations of Neptune's five irregular moons discovered by Gladman et al. in the month before (August 2002), although S/2002 N 5 was lost after these observations and was never seen again until September 2021.