Composite image showing the positions of Remus and Romulus around 87 Sylvia on 9 different nights as seen on NACO images. It clearly reveals the orbits of the two moonlets. The inset shows the potato shape of 87 Sylvia. The field of view is 2 arcsec. North is up and East is left.
ESO
CC BY 4.0
<a rel="nofollow" class="external text" href="http://www.eso.org/gallery/v/ESOPIA/SolarSystem/phot-25a-05-normal.jpg.html">Orbits of Twin Moonlets around 87 Sylvia</a>