An Enterprise-D shuttlecraft flown by William Riker and the J'naii pilot Soren in 2368 to chart a pocket of null space and rescue the crew of the missing shuttle Taris Murn.
The Magellan appears in the Next Generation episode The Outcast. The J'naii ask the Enterprise for help in finding their shuttle Taris Murn, which has vanished into a pocket of null space, a region that drains energy and cannot be seen from outside.
Riker and Soren spend several days together in the Magellan mapping the edges of the pocket, and it is during these flights that Soren admits to identifying as female, something forbidden in J'naii society. The two then take the shuttle inside the pocket.
They find the Taris Murn and its two crew alive, but the Magellan loses power so quickly that it has to be abandoned, and all four are beamed back to the Enterprise at the last moment.