I've just been working out some interesting facts and suppositions.
I did some math based on both speculation, in the case of Dooku, and factual data gathered from the Jedi Apprentice Books.
900 when he dies and Luke Skywalker is knighted
899 when he apprentices Luke Skywalker
878 when he goes into exile on Dagobah
874 when he becomes a general in the Clone Wars
864 when Dooku betrays him and leaves the Jedi Order
840 when he first meets Obi-Wan
817 when Dooku takes Qui-Gon Jinn as his apprentice
817 when Yoda apprentices Ki-Adi Mundi as his next padawan
813 when he knights Dooku
802 when he apprentices Dooku
COUNT DOOKU is 15 years older than Qui-Gon
89 (approximately) for Episode III
85 in AOTC
75 when he left the Jedi Order
66 when Anakin Skywalker was conceived
39 when Qui-Gon Jinn was first knighted
28 when he became Qui-Gon's master
13 when he became Yoda's apprentice
QUI-GON JINN is 36 years older than Obi-Wan
60 when killed in TPM
49 when he became Obi-Wan's master
39 when Qui-Gon was betrayed by Xanatos
28 when he became Xanatos' master
24 when he became knighted
13 when he became Dooku's apprentice
XANATOS is 15 years older than Xanatos
34 when he was killed in TDOR
24 when he betrayed Qui-Gon
13 when he became Qui-Gon's apprentice
Obi-Wan Kenobi is 15 years older than Anakin Skywalker
56 when killed by Darth Vader in ANH
56 when he apprentices Luke Skywalker
38 when he goes into exile on Tatooine
34 when he was a general during the Clone Wars (AOTC)
24 during TPM when he's knighted and becomes Anakin's master
15 when Anakin Skywalker is born
13 when he is apprenticed to Qui-Gon Jinn
45 when he is killed in his battle with Darth Sidious
44 when he sets a trap on Cloud City in attempt to capture Luke Skywalker
41 when he vanquishes his old Jedi Master, Obi-Wan Kenobi on the Death Star
23 when he is presumed dead and becomes Darth Vader
22 when he fathers Luke Skywalker and Princess Leia
19 when he marries Padme Naberrie-Amidala
9 when he becomes the apprentice of Obi-Wan Kenobi
Some interesting patterns develop here - some of which are disturbingly coincidental:
Jedi being 15 years older than their padawans cannot be the norm. One thing is clear: Obi-Wan started training Anakin when both of them were at too young of an age, not to mention Anakin not being raised in the Jedi Temple.
But can 4 more years as a full knight make a Jedi ready to teach a padawan by age 28? To get a 13 year old at that age, it would still be like becoming a father or mother at age 15 yourself.
I thought this was to be shown as part of what went wrong with Obi-Wan and Anakin, but Dooku and Qui-Gon each took their first apprentice at a young age.
Perhaps Qui-Gon took Xanatos so young, because he wanted to be like Dooku. The match ultimately failed.
Obi-Wan was not intended to be Anakin's master at so young of age, but we all know how that happened.
But Dooku had in fact trained Qui-Gon correctly, even if this wasn't normal for the age gap, proving it could be done.
What do you guys think?
And how old was Shmi Skywalker in TPM? If she was 40, then she was 31 when Anakin was conceived, but in my theory that Dooku was the father, a 66 year old with a 31 year old is possible (check out Harrison Ford with Ally McBeal) but sort of unlikely, unless she fell in love with her Jedi rescuer (who then gets her pregnant and leaves her in slavery).