Anakin Skywalker, aka Darth Vader, was about 46 years old when he met his demise. If you track the Star Wars timeline, Anakin was born 41 years before the Battle of Yavin, which is a sort of "year zero" in the Star Wars chronology.

During his Padawan training, Obi-Wan and Qui-Gon Jinn were assigned to be bodyguards to Duchess Satine Kryze of Mandalore. They spent nearly a year together, often unsure of what fate the next day would bring. Eventually, the two fell in love, and during their private moments, Satine affectionately called him “Ben”.

🎬 [ANH] Why did Obi-Wan age so fast on Tatooine? Well, because it's TATOOINE, it is a desert planet with 2 suns so people age faster there. Which is why Obi-Wan looks like he's in his 60s in ANH when he's only 57. It would also explain why Luke looks like he's 25 in ANH when he's only 19 and Leia actually looks 19.