Aldebaran is a mid to high-ranked gun that requires the Guns 4 license to equip, and provides 30 Attack, 10 Evade, 51 CT, and 5% Combo Rate. It can be bought for 10,000 gil at Phon Coast and Archades, found at Phon Coast (Pora-Pora Sands or The Hakawea Shore), dropped from Bangaa Pirate (1% chance), or from the Bazaar from the "Mudslinger" category.
In the Zodiac versions, it now provides 33 Attack, 10 Evade, 50 CT, 5% critical rate, and requires the Guns 4 license for 70 LP. It can now be bought for 7,700 gil at Phon Coast and Archades, dropped from the Bangaa Pirate (1% chance), and found at Phon Coast (The Hakawea Shore), Tchita Uplands (The Lost Way) and in Trial Mode Stage 74 (with Diamond Armlet equipped).
The stronger version, Mithuna provides 66 Attack, 25 Evade, 50 CT, 10% critical rate, and requires the Mithuna license for 190 LP. It can be bought from the bazaar for 120,000 gil after selling Emperor Scale x2, Silver Liquid x3, and Earth Crystal x8. Both weapons can be equipped by the Machinist.
Aldebaran appears not as a firearm but rather a star globe for Astrologians, a possible reward for delivering the ritual items from completing "The Bowl of Embers (Extreme)", "The Navel (Extreme)", and "The Howling Eye (Extreme)". It requires level 50 or higher to equip with an item level of 90, and provides Vitality +32, Mind +31, Piety +28, and Determination +18.
Aldebaran is a level 60 gun that provides -228 HP, +54 Bravery, +45 Attack, -1 Defense, and Assist Gauge Duration +20%. It can be obtained from the shop by trading 73,640 gil, Capella, Scorpion Shell, and Gunner's Desire x5.
Aldebaran is an orange giant star that is located about 65 light years from the zodiac constellation of Taurus.