Marvel Chronology Project

Thor makes a one-panel cameo in A 22 : we see him on Bifrost, the text says "while Thor is returning to Asgard for his greatest battle !" and a footnote sends back to "Thor #122"

The 2010 Index #2 agrees that Thor, in JIM 122, is also in A 22-FB. The MCP even gives the panels :
THOR
JIM 121
JIM 122 (1 - 9:1)
A 22-FB
JIM 122 (9:2 - 16:7)
JIM 123

And it's true there's a gap in between JIM 122 (9:1) and (9:2) : Loki brought the Absorbing Man to Asgard ; then "a short time later", they go together into Odin's palace.

But Thor departs to Asgard to battle the Absorbing Man, along with reporter Harris Hobbs, only at the beginning of JIM 123. A 22-FB (11:5) fits well with JIM 123 (3:2). At the time of JIM 122 (9:1-9:2), Don Blake has brought Jane Foster in a hospital room and tends her. So why this placement for A 22-FB ?

Michael, good job picking up on this. The first Avengers Index identified the panel with Thor in A 22 as a flashback, but it failed to correct the mistake in the editorial note (JIM 123 anot 122). I imagine the second Avengers Index just picked up on this and it was perpetuated through the MCP (which noticed a seemingly logical break in JIM 122) and the new Thor and Avengers Indexes.

Thor's chronology should read:
JIM 122
JIM 123 (1-2)
A 22-FB
JIM 123 (3-16)

Thanks Paul. Now, if I understand it well :

Iron Man, Thor and Giant-Man each make a one-panel cameo appearance in A 22, theoretically at the same moment the Avengers are wanted by the police. It works for Iron Man and Giant-Man, but not for Thor, because A 22 is after FF@ 3 (which is is between A 18 and A 19) ; Thor has met the Avengers in JIM 120, in between A 17 and A 18, and there's no gap for Thor to appear in FF@ 3 in between JIM 120 and JIM 123 ! So Thor's appearance in A 22 has been retconned as a FB so it can take place before FF@ 3, that's why we have A 22-FB in Thor's chronology, and A 22 in Iron Man's and Giant-Man's chronologies. Correct ?

Exactly.