Photonic torpedoes are missile weapons used on Earth starships in the 22nd century. They are essentially low-performance photon torpedoes. Like their descendants, they have variable explosive yield. According to Malcolm Reed, a maximum-yield photonic torpedo can "put a 3-kilometer crater into an asteroid," suggesting a high yield anywhere between 1 megaton and over 100 megatons, depending on asteroid composition.
- Star Trek: Enterprise
- ENT "The Expanse"