jegan
A fictional manned military robot from the Gundam mechaverse. It first appeared in Char's Counterattack from 1988.
RGM-89 Jegan
The Federation's successor to the versatile but terribly underperforming GM mobile suit series. Tougher armor and much more power ensured the Jegan was a much greater machine than the countlessly refitted GMs it was replacing.
The RGM-89D Jegan D Type is a minor update of the type, with more flexible loadouts and minute improved sensors and thruster packs. That not much was changed showed a degree of refinement in the original design that enabled it to remain at the cutting edge of mass produced MS even at the rapidly evolving environment of the Universal Century. The Jegan was later developed into the Jesta and the ReZEL mobile suit designs.
The Jegan is also strikingly similar to another of Izubuchi Yutaka's mechs - the iconic AV-98 Ingram, from Kidou Keisatsu Patlabor.