Older ship in low orbit begins to decay rapidly, tumbling down to the planet while surviving much of the fall (lack of atmo to cause burn off).
Or, the hydra could dock with it. Automated procedures has the derelict holding the hydra in place while its docked. Cue the orbital decay, dragging both ships down at once? Gravity could rip the hydra away during the descent, leaving two distinct crash sites. Damages are up to the GM.
Edit: landing site for the hydra, treacherous terrain between them. Maybe some crew didn't get off the derelict in time and have to survive and meet up with the hydra at its landing site. Bonus points for no radio, suit leaks, equipment malfunction, manticore run in, and 'ghosts' in the ship (malfunctioning repair drones, AI trying to establish connection, etc)