Discovered by southern hemisphere observers, this comet's closest approach to the Sun occurred in December last year as it passed just outside planet Earth's orbit.
(this comet's closest approach to the Sun; occurred; T:in December; T:last year; T:as it passed just outside planet Earth's orbit) (it; passed; L:just outside planet Earth's orbit)
this comet's closest approach to the Sun it
occurred passed
T:in December T:last year T:as it passed just outside planet Earth's orbit
L:just outside planet Earth's orbit